Here is what I am trying to do (for over a day now :( A user clicks on a link of a book name and I read the name of that book. I then take that book name and make an Ajax request to a Jersey resource. Within that Jersey resource, I call a method in a POJO class where one method interacts with database and gets the data to be sent back to a Jersey resource. I have got many errors but I have been able to fix them one at a time. The error currently I am stuck at is:
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '?' at line 1
Here is my JavaScript code:
function dealWithData(nameOfBook){
var bookName = encodeURI(nameOfBook);
console.log("http://localhost:8080/library/rest/books/allBooks/"+bookName);
var requestData = {
"contentType": "application/json",
"dataType": "text",
"type": "GET",
"url": "http://localhost:8080/library/rest/books/allBooks/"+bookName
**//beforeSend has been added as an edit to original code**
beforeSend: function (jqXHR, settings) {
var theUrlBeingSent = settings.url;
alert(theUrlBeingSent);
}
};
var request = $.ajax(requestData);
request.success(function(data) {
alert("Success!!");
});
request.fail(function(jqXHR, status, errorMessage) {
if((errorMessage = $.trim(errorMessage)) === "") {
alert("An unspecified error occurred. Check the server error log for details.");
}
else {
alert("An error occurred: " + errorMessage);
}
});
}
For some reason in above code, console.log line shows url with spaces being encoded as %20 while in the variable 'requestData', url doesn't have that encoding. I am unable to understand why.
Here is the code for my resource:
#GET
#Path("/allBooks/{bookName}")
#Produces(MediaType.APPLICATION_JSON)
public Response getBook(#PathParam("bookName") String bookName){
System.out.println("Book name is: "+ bookName);
BookInformation bookInfo = new BookInformation();
String bookInformation =bookInfo.bookInformation(bookName);
ResponseBuilder responseBuilder = Response.status(Status.OK);
responseBuilder.entity(bookInformation);
Response response = responseBuilder.build();
return response;
}
Here is the bookInformation method:
public String bookInformation(String bookName){
String infoQuery = "Select * from bookinfo where name = ?";
ResultSet result = null;
conn = newConnection.dbConnection();
try
{
preparedStatement = conn.prepareStatement(infoQuery);
preparedStatement.setString(1, bookName);
result = preparedStatement.executeQuery(infoQuery);
}
catch (SQLException e)
{
e.printStackTrace();
}
try
{
if(result != null){
while(result.next()){
availability = result.getString("availability");
isbn = result.getInt("isbn");
hardback = result.getString("hardback");
paperback = result.getString("paperback");
name = result.getString("name");
}
}
else{
System.out.println("No result set obtained");
}
}
catch (SQLException e)
{
e.printStackTrace();
}
//I will build this String using a String builder which I will return
String finalBookInformation = information.toString();
return finalBookInformation;
}
Earlier, in dataType I had json which was throwing a different error, but I realized I was not building json so I changed dataType to text and that error went away. My parametirized query doesn't execute. If I try hard coding a value from database, it works fine but not when I use prepared statement. I eventually want to return JSON but for now I just want it to work. Any help will be appreciated. I have tried researching and doing whatever I can but it is not working. Is it the encoding causing the problem? Is it my Ajax call? Any help is appreciated. Thanks.
Seems like issue is in your database query execution please replace the code
preparedStatement = conn.prepareStatement(infoQuery);
preparedStatement.setString(1, bookName);
result = preparedStatement.executeQuery(infoQuery);
with
preparedStatement = conn.prepareStatement(infoQuery);
preparedStatement.setString(1, bookName);
result = preparedStatement.executeQuery();
You are using HTTP GET method and GET method automatically %20 if find space in url.
If you change your method type to POST It should work find for you.
You can use HTTP GET but it will encode the URL as you discovered. You will need to decode the URL on the server-side. For how to do that, take a look at: How to do URL decoding in Java?.
Related
I have an android program that passes 2 value to mySQL, that is Time in and Time out. I don`t know what happen but I have a scenario that the data passed is incomplete. For example i will create a record and the only need to put is time in after i type the time i will click save so the record is time in has a data and time out is null. After saving, my auto passer sends that data to mySQL. The next thing I will do is to edit that record to add Time Out so both of them has a data. auto passer will run after checking to my database my both of columns has a data. Now this is where the error begins, I have a button call refresh which will retrieve my data from mySQL,create a JSON of that then send it in my android after the process the returned data has no Time Out and when i check it the data in mySQL has no time out also even i add it. I dont know what happened
What I did in my Java is to create a JSONArray the convert it to string the pass it in my php file then my php file decodes it then loop it while saving to database.
This is how i create a json
JSONArray vis_array = new JSONArray();
Cursor unsync_vis = Sync.Unsync_Visit_All();
while (unsync_vis.moveToNext()) {
JSONObject vis_data = new JSONObject();
try {
vis_data.put("t1", formatInsert_n(unsync_vis.getString(unsync_vis.getColumnIndex("t1"))));
vis_data.put("t2", formatInsert_n(unsync_vis.getString(unsync_vis.getColumnIndex("t2"))));
vis_array.put(vis_data);
} catch (JSONException e) {
e.printStackTrace();
Log.e("Auto Sync Error", e.getMessage());
}
}
public String formatInsert_n(String data) {
if (TextUtils.isEmpty(data) || data.length() == 0) {
data = "null";
} else {
data = data.replace("'", "''");
data = data.replace("null", "");
if (data.toString().matches("")) {
data = "null";
} else {
data = "'" + data + "'";
}
}
return data;
}
after creating that json, i will convert it to string the pass it using stringRequest then in my php i will decode it use for loop the save it in mySQL
Here is the php code
<?php
header('Content-Type: application/json');
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
$insert_visit_new = isset($_POST['insert_visit_new']) ? $_POST['insert_visit_new'] : "";
if ($insert_visit_new != "") {
$vis_array = json_decode($insert_visit_new, true);
$vis_count = count($vis_array);
for ($i = 0; $i < $vis_count; $i++) {
$vis = $vis_array[$i];
$t1 = $vis['t1'];
$t2 = $vis['t2'];
$ins_sql = "INSERT INTO table t1,t2 VALUES ('$t1','$t2') ON DUPLICATE KEY UPDATE t1 = $t1,t2 = $t2"
$stmt = $DB->prepare($ins_sql);
$stmt->execute();
}
}
echo "done";
?>
by the way the code above is inside an AsyncTask and the class is a BroadcastReceiver
is the cause is i dont unregister my BroadcastReceiver?
or my jsonArray name from this class and inside my refresh button are same?
my question is whats wrong? looks like it still passes the old data. any help is appreciated TYSM
so as part of some work I've been doing I was given a file with WebServices that are being used in a Swift application. I have zero familiarity with WebServices and only know Java through syntax understanding. I need to call one of these gets with a parameter from the swift application. What I'm trying to figure out first and foremost is how I can call one of these webservices with a parameter from the URL it's associated with. For example down below I want to call the method
http://localhost:9000/ListVehicleByPlateNumber
and I want to specify the parameter through the URL say something like
http://localhost:9000/ListVehicleByPlateNumber?para="123"
But this doesn't assign any value to the parameter and I'm not getting results. If I hardcode so that the string used in the function is = "123" it gives me the results I'm looking for. I just need to know how I can pass this parameter through the url, syntax-wise.
Routes file
GET /ListVehicleByPlateNumber controllers.NewVehicle.listVehicleByPlateNumber(para: String ?="")
Controller
public Result listVehicleByPlateNumber(String para){
NewVehicleModel v = new NewVehicleModel();
List<NewVehicleModel> vehiclesC = v.searchByPlateVehicle(para);
ObjectNode wrapper = Json.newObject();
ObjectNode msg = Json.newObject();
if(vehiclesC != null) {
msg.set("VehicleList", toJson(vehiclesC));
wrapper.set("success", msg);
return ok(wrapper);
}else{
msg.put("error", "There are no vehicles with the plate number");
wrapper.set("error", msg);
return badRequest(wrapper);
}
}
Where it's called
public List<NewVehicleModel> searchByPlateVehicle(String plateNumber){
Transaction t = Ebean.beginTransaction();
List<NewVehicleModel> vehicles = new ArrayList<>();
try {
String sql = "SELECT V.idNewVehicle, V.VehicleType,V.PlateNumber,V.VehicleJurisdiction,V.State,V.Vin,V.Year, " +
"V.Make,V.modelos,V.RegistrationNumber,V.InsuranceCompany,V.PurchaseDate,V.ExpirationDate,V.idPersonaFK " +
"FROM NewVehicle V " +
"WHERE V.PlateNumber = :plateNumber";
RawSql rawSql = RawSqlBuilder.parse(sql)
.columnMapping("V.idNewVehicle", "idNewVehicle")
.columnMapping("V.State", "state")
.columnMapping("V.VehicleType", "vehicleType")
.columnMapping("V.PlateNumber", "plateNumber")
.columnMapping("V.VehicleJurisdiction", "vehicleJurisdiction")
.columnMapping("V.Vin", "vin")
.columnMapping("V.Year", "year")
.columnMapping("V.Make", "make")
.columnMapping("V.modelos", "modelos")
.columnMapping("V.RegistrationNumber", "registrationNumber")
.columnMapping("V.InsuranceCompany", "insuranceCompany")
.columnMapping("V.PurchaseDate", "purchaseDate")
.columnMapping("V.ExpirationDate", "expirationDate")
.columnMapping("V.idPersonaFK", "idPersonaFK")
.create();
Query<NewVehicleModel> query = Ebean.find(NewVehicleModel.class);
query.setRawSql(rawSql)
.setParameter("plateNumber", plateNumber);
vehicles = query.findList();
t.commit();
}
catch (Exception e){
System.out.println(e.getMessage());
}finally {
t.end();
}
return vehicles;
}
Found my own answer. I ended up casting from Integer to String here's how it looks in routes
GET /ListVehicleByPlateNumber/:para controllers.NewVehicle.listVehicleByPlateNumber(para: Integer )
Controller
public Result listVehicleByPlateNumber(int para){
String p = String.valueOf(para);
URI Format for value 123 example.
http://localhost:9000/ListVehicleByPlateNumber/123
I'm new with java and sql query and for the user connexion, I connect to the DB and check if the login exists. Here is what I do :
requete = "SELECT Login,Password,DroitModifAnnuaire,DroitRecepteurDem,DroitResponsableDem,PiloteIso,Administrateur,DroitNews,DroitTenues,DroitEssai,Nom,Prenom FROM Annuaire WHERE Login='"
+ (request.getParameter("login") + "'");
instruction = connexion.createStatement();
jeuResultats = instruction.executeQuery(requete);
try{
jeuResultats.next();
} catch (SQLException e) {
e.printStackTrace();
}
if (jeuResultats.next() == false) {
loadJSP("/index.jsp", request, reponse);
}else {
loadJSP("/views/menu.jsp", request, reponse);
}
The login that I enter is good but it redirect me to index.jspand I have the error : the result set has no current row
I tried to search answer to this error but I didn't found. So why it returns me false ? While when I do System.out.println(jeuResultats.getString(1)); the login is printed.
jeuResultats.next(); moves your result to the next row. You start with 0th row, i.e. when you call .next() it reads the first row, then when you call it again, it tries to read the 2nd row, which does not exist.
Some additional hints, not directly related to the question:
Java Docs are a good place to start Java 8 ResultSet, for e.x., perhaps ResultSet.first() method may be more suited for your use.
Since you are working with resources, take a look at try-with-resources syntax. Official tutorials are a good starting point for that.
Also take a look at prepared statement vs Statement. Again, official guide is a good place to start
Make the below changes in you code. Currently the next() method is shifting result list to fetch the data at 1st index, whereas the data is at the 0th Index:
boolean result = false;
try{
result = jeuResultats.next();
} catch (SQLException e) {
e.printStackTrace();
}
if (!result) {
loadJSP("/index.jsp", request, reponse);
}else {
loadJSP("/views/menu.jsp", request, reponse);
}
Replace your code by below code:
requete = "SELECT Login, Password, DroitModifAnnuaire, DroitRecepteurDem, DroitResponsableDem, PiloteIso, Administrateur, DroitNews, DroitTenues, DroitEssai, Nom, Prenom FROM Annuaire WHERE Login = '"
+ (request.getParameter("login") + "'");
instruction = connexion.createStatement();
jeuResultats = instruction.executeQuery(requete);
try{
if (jeuResultats.next()) {
loadJSP("/index.jsp", request, reponse);
} else {
loadJSP("/views/menu.jsp", request, reponse);
}
} catch (SQLException e) {
e.printStackTrace();
}
i am a student and right now I'm doing an internship working with a local library, and in this case i have the following problem:
In the project i´m making, i need to retrieve image data from a temporal table, constructed in ORACLE that receives its data from some triggers in an INFORMIX DB and parse it through a monitor made in JAVA, in a JSON format to a web service published in C# and insert that image in a SQL Server DB.
I looked around and i found that it was possible to parse images through JSON using Base64 encoding and whatnot but when they talk about it they say that you must have the image path file and encode it. as you may have realized by now, i cant use that route because i don't have those images, best case scenario, the triggers are able to feed some BLOB data (by what I've been told). but i have to insert them in the SQL Server DB as Varbinary(MAX).
To summarize:
-->Informix DB has images -->triggers feed an ORACLE Temp_table (images sent probably as BLOB or CLOB at most)-->monitor made in JAVA must read those BLOBS or CLOBS and send them through JSON
-->Web Service made in C# must receive that JSON, and insert the images in a SQL Server DB (where they need to be visible, without having the physical file to refer to).
the schema i´m using (it has been IMPOSED to me, i didn't had a saying in this) is something similar to this: (it´s really long and tedious code so i´ll try to make it as neat and clean as possible)
This is the part of the java monitor that specifies which fields from the temp_table are feeding what fields in the JSON structure
public static BookRecordList viewBookRecordTable(Connection connection) throws ExceptionToOracleConcurrent
{
BookRecordList bookRecordList = new BookRecordList();
BookRecord bookRecord = new BookRecord();
Statement stmt = null;
String query = "SELECT operacion,"
+ "UTL_RAW.CAST_TO_VARCHAR2(DBMS_LOB.SUBSTR(img_logo,32670,1))"
+ "x_logo,"
+ "UTL_RAW.CAST_TO_VARCHAR2(DBMS_LOB.SUBSTR(img_logoGris,32760,1))"
+ "UTL_RAW.CAST_TO_VARCHAR2(DBMS_LOB.SUBSTR(r_firma,32670,1)),"
+ " FROM "
+ dataBaseConnectionData.getDB_SHCHEMA() + "."+ dataBaseConnectionData.getDB_TABLE_COLA()
+ " WHERE (some condition)";
try
{
stmt = connection.createStatement();
ResultSet rs = stmt.executeQuery(query);
while(rs.next())
{
try
{
bookRecord = new BookRecord();
bookRecord.setOperacion(rs.getInt("operacion"));
bookRecord.setImg_logo(rs.getString("img_logo"));
bookRecord.setImg_logoGris(rs.getString("img_logoGris"))
bookRecord.setR_firma(rs.getString("r_firma"));
bookRecord.print();
bookRecordList.getBookRecordList().add(bookRecord);
}
catch (Exception e)
{
logger.error("Some exception " + dataBaseConnectionData.getDB_TABLE_COLA() + ": " + e.toString());
e.printStackTrace();
//Process next order
continue;
}
}
}
catch (SQLException e )
{
logger.fatal("Some exception " + dataBaseConnectionData.getDB_TABLE_COLA() + ": " + e.toString());
throw new ExceptionToOracleConcurrent("exception definition " + dataBaseConnectionData.getDB_TABLE_COLA() + ": " + e.toString());
}
finally
{
if (stmt != null)
{
try
{
stmt.close();
}
catch (SQLException e)
{
logger.fatal("another exception " + e.toString());
}
}
}
return bookRecordList;
}
This is the part of the java monitor that generates the JSON (the empty cases contain another stuff that goes into the JSON but i sorted that out)
private static String GenerateJSON(SomeClass someClass) throws IOException
{
int operation = someClass.getOperation();
JSONObject obj = new JSONObject();
String jsonText = "";
switch (operation)
{
case 0:
//obligatory fields
obj.put("img_logo",someClass.getImg_logo());
break;
case 1:
break;
case 2:
//Obligatory fields
obj.put("img_foto",someClass.getC_empleado());
obj.put("img_firma",someClass.getC_empleado());
break;
case 3:
obj.put("r_firma",someClass.getR_firma());
break;
case 4:
break;
case 5:
break;
}
StringWriter out = new StringWriter();
obj.writeJSONString(out);
jsonText = out.toString();
String newJson = jsonText.replace("\\/", "/");
logger.info("JSON a enviar: " + newJson);
return newJson;
}
The web service is made in C#, it´s another case based program, structured accordingly to the operation number received in the JSON, it calls a number of function and, in the end, it comes down to these two:
this part of the WS receive the parameters of the parsed JSON
public int ActualizarFichaLibro( String img_foto, String r_firma)
{
try
{
//Define query to insert
Cmd.CommandText = QueryCFA.ActualizarFicha();
//Define parameters types to insert
Cmd.Parameters.Add("#img_foto", SqlDbType.VarBinary, -1);
Cmd.Parameters.Add("#r_firma", SqlDbType.VarBinary, -1);
//Define parameters values to insert
Cmd.Parameters["#img_foto"].Value = img_foto;
Cmd.Parameters["#r_firma"].Value = r_firma;
int rowCount = Cmd.ExecuteNonQuery();
CerrarConexionBd();
return rowCount;
}
catch (Exception)
{
return 0;
}
}
and finally that invokes a simple query, in this particular case, to this one:
public string ActualizarFicha()
{
Query = "UPDATE dbo.fichaEmpleado SET( CASE WHEN #img_foto = '' THEN NULL ELSE img_foto = CONVERT(VARBINARY(MAX), #img_foto, 2) END,"
+ "CASE WHEN #r_firma = '' THEN NULL ELSE img_firma = CONVERT(VARBINARY(MAX), #r_firma, 2) END,"
+"WHERE (some conditions)";
return Query;
}
my questions are:
is there a way to do this (sending images from one DB to anther) through JSON, specifically with this massive schema this people got going on? if not is there a way to do it?
the querys for reading a BLOB (possible BLOB) and inserting a Varbinary are well implemented?
I´m sorry for the extremely long explanation, I've been working on this for a week and i cant seem to find a proper way to do it (at least not with this schema, but the bosses don't want to change it)
I have created an ajax call in jquery to my server, the trouble I'm facing now is that my response is printing ? even though the correct integer value is written into the output stream. Ajax function is given below.
$dntb.on('click', 'button', function(event) {
var i = $(this).closest('tr').index(); //have to get the row where the button is clicked
var sditmId = $("#sditm").val();
var sdhedId = $("#sdhed").val();
$.get('getstock', {
sditmId: sditmId,
sdhedId: sdhedId
}, function(response) {
alert(response);
var stk = ""+response;
$("#stk").val(stk);
});
});
This function is called on click of an issue button in my table shown below
The server code is given below
int stk = null;
switch (userPath) {
case "/getstock":
stk = opo.getStockData(request.getParameter("sditmId") request.getParameter("sdhedId")); //value to write into the output stream.
break;
case "/temp":
//er = opo.checkCatUniqueForEdit(request.getParameter("catName"), request.getParameter("catId"));
break;
}
System.out.println(stk); //Printing correctly
response.setContentType("text/html");
response.getWriter().write(stk);
Code to get the value
public int getStockData(String sditm, String sdhed) {
int stk = 0;
try {
String query = "Select stk.Stk_instk from tbstk stk inner join tbsditm itm on itm.Sditm_prdid=stk.Stk_prdid where itm.Sditm_sdhed=" + sdhed + " and itm.Sditm_id=" + sditm;
Statement stmt = dcon.con.createStatement();
ResultSet rs = stmt.executeQuery(query);
if (rs.next()) {
stk = rs.getInt("Stk_instk");
}
} catch (SQLException ex) {
Logger.getLogger(Op_OrdConf.class.getName()).log(Level.SEVERE, null, ex);
}
return stk;
}
The ajax call happens successfully but when I alert the response I'm getting and I'm getting the value correctly in the server but in the client side it is ?. Please help me solve this
Not sure but seems that you are missing a comma here:
stk = opo.getStockData(request.getParameter("sditmId"), request.getParameter("sdhedId"));
//----------------------------------------------------^-----i think this is missing.
As per your comment i would suggest you to explicitly set the dataType to html:
$.get('getstock', {
sditmId: sditmId,
sdhedId: sdhedId
}, function(response) {
alert(response);
var stk = "" + response;
$("#stk").val(stk);
},"html"); //<----------add the dataType here.
I converted the int value returning from the function as given below to String, it seems to be some conflict between the content type and the value written into the output stream
stk = opo.getStockData(request.getParameter("sditmId") request.getParameter("sdhedId"));