I've delved into StackOverflow for days and went through these links 1 and 2 and 3 but all to no avail.
I am a newbie in java web applications. I am using Tomcat 9.0.4 and Jersey 1.18 in my project. I want to pass 4 parameters as 4 points to a post web service written in JAX-RS and get back the area and perimeter in response. This is my server-side web service:
@path("/geo")
public class geonodes{
static double area(double x1,double y1,double x2,double y2){
//do area calculation
}
static double perimeter(double x1,double y1,double x2,double y2){
//do perimeter calculation
}
@POST
@Produces(MediaType.APPLICATION_JSON)
public Response calculate(@QuerParam("x1") Double x1,@QuerParam("y1") Double y1,@QuerParam("x2") Double x2,@QuerParam("y2") Double y2){
JSONObject obj = new JSONObject();
obj.put("area",area(x1,y1,x2,y2));
obj.put("perimeter",perimeter(x1,y1,x2,y2));
result = JSONObject.toJSONString(obj);
return Response.status(201).entity(result).build();
}
and this is my ajax client-side call:
$.ajax({
url:'http://localhost:8080/api/geo',
type:'POST',
dataType:'json',
contentType:'application/json',
data:JSON.stringify({x1:22.1,y1:44.19,x2:55.33,y2:49.72}),
success:function(data){console.log(data);},
error:function(errMsg){console.log(errMsg);},
});
I use a non-maven project including these jar files:
And this is my web.xml
<servlet>
<servlet-name>Geo Nodes API</servlet-name>
<servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>example,com.fasterxml.jackson.jaxrs.json</param-value>
</init-param>
<init-param>
<param-name>com.sun.jersey.api.json.POJOMappingFeature</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Geo Nodes API</servlet-name>
<url-pattern>/api/*</url-pattern>
</servlet-mapping>
<filter>
<filter-name>CorsFilter</filter-name>
<filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>CorsFilter</filter-name>
<url-pattern>/api/*</url-pattern>
</filter-mapping>
The response was always null and after a long search and google, I found the problem in parameters so in response I returned them. when I call the address by the postman the result returns correctly as below:
But invoking by ajax or another system, the parameters are always null.
Whenever I use something except @QueryParam i.e the class with getter and setter like below code the postman gets the 415 error either. The Coordinats.java class:
import javax.xml.bind.annotation.XmlRootElement;
@XmlRootElement
public class Coordinates {
private Double x1;
private Double y1;
private Double x2;
private Double y2;
public Double getX1() {
return x1;
}
public void setX1(Double x1) {
this.x1 = x1;
}
public Double getY1() {
return y1;
}
public void setY1(Double y1) {
this.y1 = y1;
}
public Double getX2() {
return x2;
}
public void setX2(Double x2) {
this.x2 = x2;
}
public Double getY2() {
return y2;
}
public void setY2(Double y2) {
this.y2 = y2;
}
}
The server-side code snippet:
import model.Coordinates;
import javax.ws.rs.*;
import javax.ws.rs.core.MediaType;
@Path("geo")
public class Geo {
@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public Coordinates request(Coordinates coordinates){
Double x1 = coordinates.getX1();
Double y1 = coordinates.getY1();
Double x2 = coordinates.getX2();
Double y2 = coordinates.getY2();
return coordinates;
}
}
This is the stack trace:
04-Dec-2020 05:53:14.771 SEVERE [http-nio-8080-exec-7] com.sun.jersey.spi.container.ContainerRequest.getEntity A message body reader for Java class model.Coordinates, and Java type class model.Coordinates, and MIME media type application/json was not found.
The registered message body readers compatible with the MIME media type are:
application/json ->
com.sun.jersey.json.impl.provider.entity.JSONJAXBElementProvider$App
com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider$App
com.sun.jersey.json.impl.provider.entity.JSONListElementProvider$App
*/* ->
com.sun.jersey.core.impl.provider.entity.FormProvider
com.sun.jersey.core.impl.provider.entity.StringProvider
com.sun.jersey.core.impl.provider.entity.ByteArrayProvider
com.sun.jersey.core.impl.provider.entity.FileProvider
com.sun.jersey.core.impl.provider.entity.InputStreamProvider
com.sun.jersey.core.impl.provider.entity.DataSourceProvider
com.sun.jersey.core.impl.provider.entity.XMLJAXBElementProvider$General
com.sun.jersey.core.impl.provider.entity.ReaderProvider
com.sun.jersey.core.impl.provider.entity.DocumentProvider
com.sun.jersey.core.impl.provider.entity.SourceProvider$StreamSourceReader
com.sun.jersey.core.impl.provider.entity.SourceProvider$SAXSourceReader
com.sun.jersey.core.impl.provider.entity.SourceProvider$DOMSourceReader
com.sun.jersey.json.impl.provider.entity.JSONJAXBElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLRootElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLListElementProvider$General
com.sun.jersey.core.impl.provider.entity.XMLRootObjectProvider$General
com.sun.jersey.core.impl.provider.entity.EntityHolderReader
com.sun.jersey.json.impl.provider.entity.JSONRootElementProvider$General
com.sun.jersey.json.impl.provider.entity.JSONListElementProvider$General
I added every jar file that is needed and now I'm confusing what's wrong!? When I pass an object I get a 415-error and when I pass @QueryParam the parameters are accessible by the postman call not accessible by ajax call though!!!
