In my Java code I am trying to read a .csv file into a .arff file and I am making use of CSVLoader for this purpose. Below is my code :
package processingPackage;
import java.io.File;
import java.io.IOException;
import weka.core.Instances;
import weka.core.converters.CSVLoader;
public class GenerateArffDetails {
/*filePath in the following line*/
/*"/Users/SubrataMohanty/Desktop/customer_loan_details.csv"*/
public String getTrainFilePath (String filePath) throws IOException {
System.out.println(filePath);
CSVLoader loader = new CSVLoader();
loader.setSource(new File(filePath));
System.out.println(filePath);
Instances dataStructure = loader.getStructure();
Instances data = loader.getDataSet();
weka.core.converters.ArffSaver saver = new weka.core.converters.ArffSaver();
saver.setInstances(data);
saver.setFile(new File("/Users/SubrataMohanty/Desktop/customer_loan_details.arff"));
saver.writeBatch();
String path = "/Users/SubrataMohanty/Desktop/customer_loan_details.arff";
return (path);
}
}
Upon executing the above code, I keep getting the following error trace.
java.io.IOException: No source has been specified
at weka.core.converters.CSVLoader.getStructure(CSVLoader.java:962)
at processingPackage.GenerateArffDetails.getTrainFilePath(GenerateArffDetails.java:19)
at processingPackage.LoanClassifier.classifyLoanApplicant(LoanClassifier.java:23)
at processingPackage.Driver.classifyApplicants(Driver.java:15)
at processingPackage.RunClassifier.doGet(RunClassifier.java:38)
at processingPackage.RunClassifier.doPost(RunClassifier.java:48)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1457)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
I pass the filePath variable in the following String variable format :
"/Users/SubrataMohanty/Desktop/customer_loan_details.csv"
Upon doing a further reading on the CSVLoader class I stumbled up the m_sourceReader variable which is initialized like this :
m_sourceReader = new BufferedReader(new InputStreamReader(input));
and returns the exception above if it has null which I do not understand as I am clearly passing a filePath which is correct. So what is my error?
May I know how to resolve this?
NOTE : I am working on MacOSX Sierra for my project.
Related
I can't see the error of my code, I hope you can find it!
Language: Java
IDE: Eclipse
I've created an object.
This object contains this data:
public class ObjectTypeBean {
private Map<String, String> connectedOperators = new HashMap<String, String>();
public Map<String, String> getConnectedOperators() {
return connectedOperators;
}
public void setConnectedOperators(String operatorId, String label) {
this.connectedOperators.put(operatorId, label);
}
}
Then I've created a list of this object-class
List<ObjectTypeBean> name= new ArrayList<ObjectTypeBean>();
And I'm trying to add new Data to the map.
I'm trying it like this:
for(ObjectTypeBean n:name){
n.setConnectedOperators("one", "two");
}
But as soon as I tun this I get a
java.lang.UnsupportedOperationException
at java.base/java.util.AbstractMap.put(AbstractMap.java:209)
at ObjectTypeBean.setConnectedOperators(ObjectTypeBean.java:356)
at MyServlet.doPost(MyServlet.java:372)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at CharsetFilter.doFilter(CharsetFilter.java:31)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:836)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1839)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:834).
Thanks to your suggestions I found the answer!
The problem was, that I'm using a builder in my ObjectTypeBean-Object.
As the builder creates an Collections.emptyMap() so that the map can be empty.
I've removed the connectedOperators-Map from the builder and there is no error anymore.
Thankyou!
I am currently working on a spring project.
I'm currently testing files using Postman to upload them to the server. The problem is an error stating that the path to the file is not But I'm running a command to create a file if the file is not in the path. Why can't I find the file?
POSTMAN
Controller
#RequestMapping(value="/v1/point/action/user/update_user_profile_image", method = RequestMethod.POST)
public #ResponseBody Map<String, Object> update_user_profile_image(HttpServletRequest webRequest
, #RequestParam(value="image", required=false) MultipartFile image
) {
Map<String, String> param = new HashMap<String, String>();
Map<String, Object> result = new HashMap<String, Object>();
String seq_no = (webRequest.getParameter("seq_no") != null) ? webRequest.getParameter("seq_no") : "";
Log.w("\r\n\r\n" +
"***** API Calling - [ /v1/point/action/notice/update_user_profile_image ]********\r\n" +
"-------------------------------------------------------------------------------\r\n" +
" - seq_no : [ " + seq_no + " ] \r\n" +
" - image : [ " + image + " ] \r\n" +
"*******************************************************************************\r\n");
try {
// The image has been updated.
String imagePath = "";
if (image != null) {
String Extension = Config.USER_PROFILE_IMAGE_EXT;
String fileName = "user_profile_" + Utils.getCurrentTime("yyyyMMddHHmmssSSS");
imagePath = Define.CONTENTS_FILE_PATH_4 + fileName + Extension ;
File saveDir = new File(Define.CONTENTS_SAVE_PATH + Define.CONTENTS_FILE_PATH_4);
if (!saveDir.isFile()) saveDir.mkdirs();
image.transferTo(new File(Define.CONTENTS_SAVE_PATH + imagePath));
String fileName_thumbnail = fileName + "_thumb" + Extension;
File thumbnail = new File(Define.CONTENTS_SAVE_PATH + Define.CONTENTS_FILE_PATH_4 + fileName_thumbnail);
thumbnail.getParentFile().mkdirs();
Thumbnails.of(saveDir + "/" + fileName + Extension).size(Config.USER_PROFILE_IMAGE_WIDTH, Config.USER_PROFILE_IMAGE_HEIGHT).outputFormat("jpg").toFile(thumbnail);
}
param.put("imagepath", (!imagePath.equals("")) ? Define.PLATFORM_SERVER_HOST_NAME + imagePath : "");
param.put("seq_no", seq_no);
if (backOfficeDaoSecond.update_user_profile_image(param) < 1) {
result.put("resultCode", Define.ERROR_CODE_002);
result.put("resultMsg", "Databases update fail..");
} else {
result.put("resultCode", Define.SUCCESS_CODE_000);
result.put("resultMsg", "Shop successful in modifying product information.");
}
} catch (Exception e) {
e.printStackTrace();
result.put("resultCode", Define.ERROR_CODE_001);
result.put("resultMsg", "[ERROR] Server error");
}
return result;
}
ERROR:
java.io.IOException: java.io.FileNotFoundException: /mnt/platform/contents/member_profile_img/user_profile_20190820104359375.jpg (No such file or directory)
at org.apache.catalina.core.ApplicationPart.write(ApplicationPart.java:122)
at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile.transferTo(StandardMultipartHttpServletRequest.java:255)
at net.point.service.game.admin.backoffice.controller.BackOfficeDaoSecondController.update_user_profile_image(BackOfficeDaoSecondController.java:1441)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:215)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:142)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:800)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:998)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:901)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:875)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:770)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.io.FileNotFoundException: /mnt/platform/contents/member_profile_img/user_profile_20190820104359375.jpg (No such file or directory)
at java.io.FileOutputStream.open0(Native Method)
at java.io.FileOutputStream.open(FileOutputStream.java:270)
at java.io.FileOutputStream.<init>(FileOutputStream.java:213)
at java.io.FileOutputStream.<init>(FileOutputStream.java:162)
at org.apache.tomcat.util.http.fileupload.disk.DiskFileItem.write(DiskFileItem.java:400)
at org.apache.catalina.core.ApplicationPart.write(ApplicationPart.java:120)
First of all, the problem happens here.
image.transferTo(new File(Define.CONTENTS_SAVE_PATH + imagePath));
Thanks in advance
I created a file directly on that path to solve this problem. And the error is gone. I don't know why the command to create the file didn't work, but the problem has been fixed.
Hi when i encountered this issue, my first action is to check if I have an access to that server I am thinking this is a firewall issue.
second, is to check if the path is correct.
I want to build a simple microservice with "Spring Boot" with IntelliJ IDE.
One method of this microservice should to accept in input a List and a Double Value.
So I'm building this code:
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RestController;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
#RestController
public class ECGController {
private double v1 = 0.01;
private double v2 = 0.01;
private int il = 0;
private static final double step = 0.0025;
#PostMapping("/clearF3A")
public List<Double> clearF3A(ArrayList<Integer> RRin, Double CR){
try{
}catch(Exception e){
}
}
In postman I'm try to execute this:
{
"RRin":[
834,
490,
878,
807,
517,
849,
816,
520,
632,
488,
701,
536,
675
],
"CR":2.0
}
but if I try to execute this request, I can display this message error:
java.lang.NullPointerException
at com.eresult.cleanECG.com.cleanECG.controller.ECGController.clearF3A(ECGController.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
java.lang.NullPointerException
Your request is bad.
Instead of providing ArrayList<Integer> RRin, Double CR to clearF3A function, you should have one object that represents whole post body (whole JSON document). That is the rule. In your case, your passed object should have two parameters, one is rrin array, and second one should be cr. Also, that parameter should be annotated with #RequestBody
Roughly, this is what you need to have:
#PostMapping("/clearF3A")
public List<Double> clearF3A(#RequestBody ClearF3ARequest){
...
}
class ClearF3ARequest {
private ArrayList<Integer> RRin;
private Double CR;
}
Hope this helps.
Create a new object to represent your JSON structure. For example:
public class EcgInput {
#JsonProperty("RRin")
private List<Integer> rrIn;
#JsonProperty("CR")
private Double cr;
//todo: add the getters and setters and methods like toString()
}
public class EcgOutput {
#JsonProperty("output")
private List<Double> output;
//todo: add the getters and setters and methods like toString()
}
Then in your controller change your method to something like:
#PostMapping("/clearF3A")
public ResponseEntity<EcgOutput> clearF3A(#RequestBody EcgInput ecgInput) {
//todo: your logic
EcgOutput output = new EcgOutput();
//todo: put your result inside it
return new ResponseEntity<>(output, HttpStatus.OK);
}
Jackson will translate JSON to those objects, and vice-versa for you.
I'm trying to get the data from "https://swapi.co/api/people/?format=json" and put it into a POJO using the RestTemplate.getForObject() method. I followed the following tutorial for consuming a RESTful webservice and adapted this for my own project: https://spring.io/guides/gs/consuming-rest/.
Upon following the tutorial somehow I got the code to work.. once.. I copied the exact code from the tutorial and I changed the source URL and the object to fit the data into. But when I try to create my own maven project, include all the needed dependencies I get a 403 forbidden Exception.
My code:
#RestController
public class CharacterListController {
#RequestMapping("/")
public SWData swData() {
RestTemplate restTemplate = new RestTemplate();
SWData swData = restTemplate.getForObject("https://swapi.co/api/people/?format=json", SWData.class);
return swData;
}
#JsonIgnoreProperties(ignoreUnknown = true)
public class SWData {
String next;
String results;
public String getNext() {
return next;
}
public void setNext(String next) {
this.next = next;
}
public String getResults() {
return results;
}
public void setResults(String results) {
this.results = results;
}
#Override
public String toString() {
return "SWData{" +
"next='" + next + '\'' +
", results='" + results + '\'' +
'}';
}
}
Stacktrace:
2019-05-28 15:00:28.800 ERROR 3643 --- [nio-8080-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.web.client.HttpClientErrorException$Forbidden: 403 Forbidden] with root cause
org.springframework.web.client.HttpClientErrorException$Forbidden: 403 Forbidden
at org.springframework.web.client.HttpClientErrorException.create(HttpClientErrorException.java:83) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:122) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.DefaultResponseErrorHandler.handleError(DefaultResponseErrorHandler.java:102) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.ResponseErrorHandler.handleError(ResponseErrorHandler.java:63) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.RestTemplate.handleResponse(RestTemplate.java:778) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:736) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:670) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.client.RestTemplate.getForObject(RestTemplate.java:311) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at io.github.BasPeter.SWAPI.rest.CharacterListController.swData(CharacterListController.java:16) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_211]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_211]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_211]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_211]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:189) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882) ~[spring-webmvc-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar:5.1.6.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200) ~[tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415) [tomcat-embed-core-9.0.17.jar:9.0.17]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.17.jar:9.0.17]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_211]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_211]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.17.jar:9.0.17]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_211]
The most frustrating part is that the code functioned at some point. It looked like it worked using the gradle stuff provided by the tutorial, but wont work when using my own maven pom.
Somehow my request is rejected by the server (?), but i don't know why. I think my code is practically the same as the code in the tutorial..
-BP
You have some extra work to do :)
1- Change your SWData class so that it will mach the JSON document you recieve when you type the targeted url on your browser. So your class should look like the following:
#JsonIgnoreProperties(ignoreUnknown = true)
public class People {
private long count;
private String next;
private String previous;
private Infos results[];
// Constructors, getters and setters
// Extra: You can add the Lombock project to automatically generates, constructors // getters and setters
}
And here is the Infos class:
public class Infos {
private String name;
private long height;
private long mass;
private String hair_color;
private String skin_color;
private String eye_color;
private String birth_year;
private String gender;
private String homeworld;
private String films[];
private String species[];
private String vehicles[];
private String starships[];
private String created;
private String edited;
private String url;
// Constructors, getters and setters
}
2- Now, if you didn't notice, you're trying to access to an https url. So You have first to configure your RestTemplate in order to use SSL certificate for request. To do that, you should first add the Apache HttpClient dependancy to your pom.xml. Use the latest version for example:
<!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpclient -->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.8</version>
</dependency>
3- Once you have Apache HttpClient libraries in you project, you can now configure your RestTemplate. Here is how you do that:
// Imports
#RestController
public class CharacterListController {
#RequestMapping("/")
public SWData swData() {
CloseableHttpClient httpClient = HttpClients.custom()
.setSSLHostnameVerifier(new NoopHostnameVerifier())
.build();
HttpComponentsClientHttpRequestFactory requestFactory = new HttpComponentsClientHttpRequestFactory();
requestFactory.setHttpClient(httpClient);
RestTemplate restTemplate = new RestTemplate(requestFactory);
SWData swData = restTemplate.getForObject("https://swapi.co/api/people/?format=json", SWData.class);
return swData;
}
}
4- That's all, you have only to run your Spring-Boot application now. Hope that will be helpful. Keep me updated with :)
I need to handle file from client using http. Server side is writen on Spring boot. This reqest controller side
#RequestMapping(value = "/upload", method = RequestMethod.POST)
#ResponseBody
public void uploadFile(#RequestParam("file") MultipartFile uploadfile) {
System.out.println("filename: " + uploadfile.getName());
}
And client side to path file is;
public static void main(String[] args) throws IOException {
URL url = new URL(UPLOAD_URL);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "multipart/form-data");
File file = new File("test.txt");
//init array with file length
byte[] bytesArray = new byte[(int) file.length()];
FileInputStream fis = new FileInputStream(file);
fis.read(bytesArray); //read file into bytes[]
fis.close();
OutputStream os = conn.getOutputStream();
os.write(bytesArray);
os.flush();
conn.disconnect();
}
But i have the following error
org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found
at org.apache.tomcat.util.http.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:840) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.tomcat.util.http.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:256) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.tomcat.util.http.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:280) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.catalina.connector.Request.parseParts(Request.java:2843) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.catalina.connector.Request.parseParameters(Request.java:3219) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.catalina.connector.Request.getParameter(Request.java:1119) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.catalina.connector.RequestFacade.getParameter(RequestFacade.java:381) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:75) ~[spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~[tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) [tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) [tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861) [tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455) [tomcat-embed-core-8.5.14.jar:8.5.14]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.14.jar:8.5.14]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_71]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_71]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.14.jar:8.5.14]
at java.lang.Thread.run(Thread.java:745) [na:1.8.0_71]
Pleas help me, i can't find the reason
I was also facing the same issue.
Dont put any value in "Header"tab of Postman. (Note: It is next to Body Tab)
This solved my problem
You are not writing your data to the connection in a multi-part structure.
You can use the answer to this question as a guide:
As the exception says your request is missing some information: Boundaries.
a multipart/form-data should be like this:
POST /upload HTTP/1.1
Host: myhost
User-Agent: uploader/1.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Content-Type: multipart/form-data; boundary=----------287032381131322
Content-Length: {sizeofcontent}
------------287032381131322
Content-Disposition: form-data; name="file"; filename="myfile.txt"
Content-Type: text/plain
My file content;
------------287032381131322--
See the boundary parameter in the content-type is used as a delimiter for each data (it can be any string).
Notice extra "--" at the end to notify data end. You need to write these to successfully upload a file.