How do I get the images I stored in my web pages folder out so I can read them into a buffered image?
I found many explanations online on how it works but it's so confusing!
Maybe someone could help me by explaining it to me in a scenario familiar to me?
This is my server folder tree:
I want to read PNG pictures from images in Web Pages from within my ItemStorage class.
Here's what that class looks like:
import java.util.ArrayList;
import java.util.List;
import be.pxl.minecraft.model.Item;
import com.sun.jersey.spi.resource.Singleton;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.imageio.ImageIO;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Response;
#Singleton
public class ItemStorage {
private ImageStorage test;
private HashMap<String, Image> categories;
private HashMap<String, BufferedImage> images;
private List<Item> recipesList;
public ItemStorage() {
File directory = new File("/images");
if (directory.isDirectory()) { //FILE PATH NOT A DIRECTORY
BufferedImage img = null;
for (File f : directory.listFiles()) {
try {
img = ImageIO.read(f);
images.put(f.getName(), img);
} catch (IOException ex) {
Logger.getLogger(ItemStorage.class.getName()).log(Level.SEVERE, "Error loading image", ex);
}
}
}
recipesList = new ArrayList<Item>();
//BufferedImage air = getImage("air"); //TRIED DIFFERENT APPROACH, SEE getImage()
//Armor
recipesList.add(new Item(7, 2, getImage("diamond_boots"), "Boots (Diamond)",
"0,0,0,1,0,1,1,0,1", String.format("%d,%d", getImage("air"), R.drawable.diamond_ingot )));
}
public void setItems(List<Item> list) {
recipesList = list;
}
public List<Item> getItems() {
return recipesList;
}
#Path("/images")
#Produces("image/png")
public Response getImage(String imageName) { //TRYING TO HTTP TO THE IMAGE
BufferedImage img = null;
try {
File imageFile = new File(imageName + ".png");
img = ImageIO.read(imageFile);
return Response.ok(img).build();
} catch (IOException ex) {
Logger.getLogger(ItemStorage.class.getName()).log(Level.SEVERE, "Error loading image", ex);
} finally {
return Response.ok(img).build();
}
}
}
As you can see, I tried to call the images both through HTTP and a simple IO directory.
This is a restful server running under tomcat 7.0.41.0
Please collaborate.
what puzzles me with your approach is, that you access a file from within your service, that is supposed to be located at the "root" ("/") directory. This is not inside your application.
In the rest service, there is no "context", as you have it in the servlet world. You need to identify the images folder somehow using a config option. You can also check the documentation of your REST server to see how to access the MessageContext and HTTPRequest. Then you can use them to access your web-application's runtime folder and access the images.
Related
I am developing a simple application where I would like to read the files from a remote URL and add them to the #ExampleObject. I am able to achieve this using CustomClass SchemaFileReader implements OASFilter but the only problem is that I need to manually specify the name of the file in the ref such as #ExampleObject(name = "Example1", ref = "Example1.json").
Since I am reading the URL there can be many files and I do not know the name of all the files so I need an approach where I can add the #ExampleObject dynamically directly without specifying ref. Rather it should read all the data from the examples. Can someone please specify some logic on how to achieve this?
I have posted my complete code on GitHub: https://github.com/Aravinda93/code-with-quarkus.
As of now, I have added manually 2 files to my #ExampleObject by specifying the ref but I need a dynamic approach to add all the 3 files present in the resourses/jsonfiles without providing the ref for all the files individually.
To run the application, please follow the following steps:
Open the terminal for the project and run mvn compile quarkus:dev
Press d in the command line this should open the Swagger-UI.
Select swagger-ui from SmallRye OpenAPI
Expand api/generate and there we will see only 2 files under examples. I need an approach to get all 3 field without specifying the ref for all of them.
After trying some things, finally, this worked for me. Posting here as it can be useful to someone in the future:
Following is my RestControllerResponse:
import org.eclipse.microprofile.openapi.annotations.media.Content;
import org.eclipse.microprofile.openapi.annotations.parameters.RequestBody;
import javax.ws.rs.Consumes;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import java.util.Map;
#Path("/api")
public class RestControllerResponse {
#Path("/generate")
#POST
#Consumes({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
#Produces({MediaType.APPLICATION_JSON, MediaType.APPLICATION_XML})
#RequestBody(description = "Testing Example without ref",
content = #Content())
public String generator(final Map<String, Object> input) throws Exception {
return "Hello From Generator Method";
}
}
Following is my SchemaFileReader which has the capability to read all files and respective subfolder with files and get the file contents and add to examples, pass the required URL to the getFolderData method:
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.entity.ContentType;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
import org.eclipse.microprofile.openapi.OASFactory;
import org.eclipse.microprofile.openapi.OASFilter;
import org.eclipse.microprofile.openapi.models.Components;
import org.eclipse.microprofile.openapi.models.OpenAPI;
import org.eclipse.microprofile.openapi.models.examples.Example;
import org.json.JSONArray;
import org.json.JSONObject;
import javax.ws.rs.core.MediaType;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
public class SchemaFileReader implements OASFilter {
private final ObjectMapper objectMapper = new ObjectMapper();
private final CloseableHttpClient httpClient = HttpClients.createDefault();
#Override
public void filterOpenAPI(OpenAPI openAPI) {
Components defaultComponents = OASFactory.createComponents();
if (openAPI.getComponents() == null) {
openAPI.setComponents(defaultComponents);
}
try {
//generateExamples().forEach(openAPI.getComponents()::addExample);
generateExamples().entrySet().forEach(ex -> openAPI.getPaths().getPathItem("/api/generate").getPOST().getRequestBody().getContent().getMediaType(MediaType.APPLICATION_JSON).addExample(ex.getKey(), ex.getValue()));
} catch (Exception e) {
e.printStackTrace();
}
}
Map<String, Example> generateExamples() throws Exception {
final Map<String, Example> examples = new LinkedHashMap<>();
getFolderData(examples, "PLACE YOUR URL HERE");
//getExamples(examples);
return examples;
}
//If user has provided the folder then recursively loop over it to get the files and their contents
private void getFolderData(final Map<String, Example> examples, final String inputURL) throws IOException {
//Make the request to provided folder path and get the folder/files from it.
final CloseableHttpResponse folderResponse = httpClient.execute(new HttpGet(inputURL));
final String responseBody = EntityUtils.toString(folderResponse.getEntity(), StandardCharsets.UTF_8);
//If the folder API request provides valid response and contains the list of files or folders then loop over it else its plain/text with direct contents
if (folderResponse.getStatusLine().getStatusCode() == 200 && ContentType.get(folderResponse.getEntity()).toString().equalsIgnoreCase("application/json; charset=utf-8")) {
final JSONArray jsonArray = new JSONArray(responseBody);
jsonArray.forEach(item -> {
final JSONObject obj = (JSONObject) item;
if (obj.getString("type").equalsIgnoreCase("file")) {
//Make request to each file in the GitHub folder and obtain its contents
try {
final CloseableHttpResponse fileResponse = httpClient.execute(new HttpGet(obj.getString("download_url")));
//If the response code is 200 then add the contents to Example
if (fileResponse.getStatusLine().getStatusCode() == 200) {
final String fileResponseBody = EntityUtils.toString(fileResponse.getEntity(), StandardCharsets.UTF_8);
if (obj.getString("download_url").contains(".json")) {
examples.put(obj.getString("name"), OASFactory.createExample().value(objectMapper.readValue(fileResponseBody, ObjectNode.class)));
} else if (obj.getString("download_url").contains(".xml")) {
examples.put(obj.getString("name"), OASFactory.createExample().value(fileResponseBody));
}
}
} catch (IOException e) {
e.printStackTrace();
}
} else {
try {
getFolderData(examples, obj.getString("url"));
} catch (IOException e) {
e.printStackTrace();
}
}
});
} else if (folderResponse.getStatusLine().getStatusCode() == 200 && ContentType.get(folderResponse.getEntity()).toString().equalsIgnoreCase("text/plain; charset=utf-8")) {
//if direct file provided then add its content
examples.put(inputURL.substring(inputURL.lastIndexOf("/")), OASFactory.createExample().value(objectMapper.readValue(responseBody, ObjectNode.class)));
}
}
}
I want to create a Java class that I use to export images. This class will be exported in .JAR file which will allow me to integrate it directly into another project by passing as input parameter the name of the file and in return I would have this image in PNG format.
That's what I tried:
package militarySymbolsLibrary;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
public class MainEntry {
public static void main(String agrs[]) {
}
public static BufferedImage generateImage(String symbolCode) {
File imageFile = new File("/pictures/SSGPU-------.png");
BufferedImage image;
try {
image = ImageIO.read(imageFile);
} catch (IOException e) {
image = null;
e.printStackTrace();
}
return image;
}
}
Pictures are stocked in folder pictures like this treeview below:
src
MainEntry.java
pictures
SSGPU-------.png
Then I export this class in .JAR file, I add it to my other program, I pass a parameter (picture's name except for this test) and normally my class return PNG file. But I have an error telling me that the file path is not the rigth one.
How can I solve this problem?
Thank you
I want to load a URL in the user's default browser. And once the webpage gets loaded completely I want to take its screenshot.
Currently I am doing it like this:
import java.awt.Desktop;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.File;
import java.net.URI;
import javax.imageio.ImageIO;
public class Example {
public static void main(String x[]) throws Exception
{
Desktop desktop = java.awt.Desktop.getDesktop();
URI oURL = new URI("http://192.168.1.125:8001/html/en/default/process/ProcessDesigner.jsp?wftId=81454277&wftVersion=1");
desktop.browse(oURL);
desktop.wait();
//desktop.print("");
Rectangle screenRect = new Rectangle(Toolkit.getDefaultToolkit().getScreenSize());
try {
Thread.sleep(20000); //1000 milliseconds is one second.
} catch(InterruptedException ex) {
Thread.currentThread().interrupt();
}
BufferedImage capture = new Robot().createScreenCapture(screenRect);
ImageIO.write(capture, "jpg", new File("E:\\Akram\\SSFolder\\fi2.jpg"));
System.out.println("Done");
}
}
Here I am using the sleep function so that I should be able to capture snapshot after screen gets loaded, but some web pages may take longer to load.
So I want confirmation that the web page is ready / loaded completely so that I can take its snapshot.
How can I achieve this?
I have tested my program on windows platform, works perfectly. But when I try to run it on Raspbian, Unix, it doesn't go further after iplcvLoadimage.
What could be the problem?
Here is my code
mport com.googlecode.javacv.cpp.opencv_core.CvPoint;
import com.googlecode.javacv.cpp.opencv_core.IplImage;
import static com.googlecode.javacv.cpp.opencv_core.cvSize;
import static com.googlecode.javacv.cpp.opencv_core.cvZero;
import static com.googlecode.javacv.cpp.opencv_core.cvMinMaxLoc;
import static com.googlecode.javacv.cpp.opencv_core.IPL_DEPTH_32F;
import static com.googlecode.javacv.cpp.opencv_core.cvCreateImage;
import static com.googlecode.javacv.cpp.opencv_imgproc.cvMatchTemplate;
import static com.googlecode.javacv.cpp.opencv_highgui.cvLoadImage;
import static com.googlecode.javacv.cpp.opencv_imgproc.CV_TM_SQDIFF;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import org.opencv.core.Core;
public class MatchTemplateTest {
public static HashMap<String,Double> getPatternMatch(String img)
{
ArrayList<String>names=new ArrayList<>();
HashMap<String,Double> MatchMap=new HashMap<>();
File []f=null;
try
{
String path=new File(new File(".").getCanonicalPath()+"/Output"+"/Logo").getAbsolutePath();
f=new File(path).listFiles();
} catch (Exception e) {
}
IplImage src=null;
try {
// this is where the problem is
src= cvLoadImage(img,0);
// can not process further
} catch (Exception e) {
System.out.println("ERROR "+e);
}
If the problem is with reading the image, then there are two possiblities
The image does not exist, or the path to the image is wrong. In *nix the path is separated with a slash '/', e.g. /home/asharma/data/myimage.pgm, but in windows it is separated with a backslash, e.g. C:\User\Data\My Image.pgm
The image decoder for the image does not exist in the version of the library. For example, if the image is in PNG format, but opencv was not compiled with PNG, then you cannot read the image.
what is the output of System.out.println("ERROR "+e);?
This code was mostly taken from Pentaho's website on sample programs. The goal is to use their API to generate HTML output with a Pentaho report.
The report was created with Pentaho 3.5.0-RC2
The version of jars I am using are the following:
pentaho-reporting-engine-classic-core-3.5.0-RC2.jar
libloader-1.1.1.jar
libbase-1.1.1.jar
The exception I am getting is the following:
org.pentaho.reporting.libraries.resourceloader.ContentNotRecognizedException: None of the selected factories was able to handle the given data: ResourceKey{schema=org.pentaho.reporting.libraries.resourceloader.loader.URLResourceLoader, identifier=file:/C:/Users/elias.kopsiaftis/workspace_experimental/TestPentahoReport/bin/Test.prpt, factoryParameters={}, parent=null}
at org.pentaho.reporting.libraries.resourceloader.DefaultResourceManagerBackend.create(DefaultResourceManagerBackend.java:295)
at org.pentaho.reporting.libraries.resourceloader.ResourceManager.create(ResourceManager.java:387)
at org.pentaho.reporting.libraries.resourceloader.ResourceManager.create(ResourceManager.java:342)
at org.pentaho.reporting.libraries.resourceloader.ResourceManager.createDirectly(ResourceManager.java:205)
at ReportTester.getReportDefinition(ReportTester.java:74)
at ReportTester.getReport(ReportTester.java:25)
at ReportTester.main(ReportTester.java:84)
java.lang.NullPointerException
at ReportTester.getReport(ReportTester.java:26)
at ReportTester.main(ReportTester.java:84)
And finally, the code snippet!
import java.io.File;
import java.io.IOException;
import java.net.URL;
import java.util.Map;
import java.util.HashMap;
import java.io.*;
import org.pentaho.reporting.engine.classic.core.DataFactory;
import org.pentaho.reporting.engine.classic.core.MasterReport;
import org.pentaho.reporting.engine.classic.core.ReportProcessingException;
import org.pentaho.reporting.engine.classic.core.modules.output.table.html.HtmlReportUtil;
import org.pentaho.reporting.libraries.resourceloader.Resource;
import org.pentaho.reporting.libraries.base.util.StackableException;
import org.pentaho.reporting.libraries.resourceloader.ResourceException;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;
public class ReportTester {
private String reportName = "FormCompleteUsagePerPartnerByMonth.prpt";
private String reportPath = "";
public void getReport() {
try {
final MasterReport report = getReportDefinition();
report.getParameterValues().put("partner", "");
report.getParameterValues().put("startingdate", "2015-03-01");
report.getParameterValues().put("endingdate", "2015-03-05");
HtmlReportUtil.createStreamHTML(report, System.out);
} catch(Exception e) {
e.printStackTrace();
}
}
private MasterReport getReportDefinition() {
try {
// Using the classloader, get the URL to the reportDefinition file
final ClassLoader classloader = this.getClass().getClassLoader();
final URL reportDefinitionURL = classloader.getResource(reportPath + reportName);
if(reportDefinitionURL == null) {
System.out.println("URL was null");
}
// Parse the report file
final ResourceManager resourceManager = new ResourceManager();
resourceManager.registerDefaults();
final Resource directly = resourceManager.createDirectly(reportDefinitionURL, MasterReport.class);
return (MasterReport) directly.getResource();
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
public static void main(String[] args) {
ReportTester rt = new ReportTester();
rt.getReport();
}
}
Any advice on this would be much appreciated as I have been scratching my head on this all day. Thanks in advance!