Catching get request in java

Question

Catching get request in java

291 Views Asked by Johnyb At 03 April 2025 at 06:22

Let's say I have a HTML page and I am running back-end on java and I want to make simple ajax request call.

e.g

fetch('localhost:8080/testResponse)
.then(function(response) {
  return response.json();
})

and on my java server I have

@Path('testResponse')
public class NewClass {
    private String name = "MyName";
    private String age = "MyAge";
    @GET
    public String getName(){
        return this.name;
    }
    @GET
    public String getAge(){
        return this.age;
    }
}

So basically there is get request to /testResponse , and Path annotation indicates what class should catch it but how do I choose what method will get invoked and returns data? Whats the logic behind it? I cannot find anything about it.

/////////////////////////////////

So. I have created new web project in netbeans. It generated html file , i added just basic ajax call to server.

<html>
    <head>
        <title>TODO supply a title</title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
    </head>
    <body>
        <div>TODO write content</div>
        <script>
            fetch('/ajax_test/testResponse/name').then(function(x){
                alert(JSON.stringify(x));
            })
        </script>
    </body>
</html>

When i run it it shows on localhost:8080/ajax_test

I created a file by comments here e.g

@Path("/ajax_test")
public class testik {
    private String name = "MyName";
     private String age = "MyAge";
    @GET
    @Path("/name")
    public String getName(){
        return this.name;
    }
    @GET
    @Path("/age")
    public String getAge(){
        return this.age;
    }
}

Yet its still 404 did i miss something? Thank you again for help

Original Q&A

There are 3 best solutions below

**sagneta** · Answer 1

SImply use the @Path to further delineate the endpoint. So if you want 'URL Prefix/testResponse/name' and 'URL Prefix/testResponse/age' then do the following:

@Path("/testResponse")
public class NewClass {
    private String name = "MyName";
     private String age = "MyAge";
    @GET
    @Path("/name")
    public String getName(){
        return this.name;
    }
    @GET
    @Path("/age")
    public String getAge(){
        return this.age;
    }

**ninja.coder** · Answer 2

If I understood you correctly then you want to invoke one of the GET methods when you hit testResponse. You are allowed to annotate your methods with @Path like this:

@Path("/")
public class NewClass {
    private String name = "MyName";
    private String age = "MyAge";

    @GET
    @Path("/testSomething")
    public String getName(){
        return this.name;
    }

    @GET
    @Path("/testResponse")
    public String getAge(){
        return this.age;
    }
}

**thatguy** · Answer 3

The first matching method for your resource /testResponse and its annotations will be called, in your case getName(). You can add additional annotations, to specialize your methods:

@Consumes: Defines the MIME media types for your request, like application/json
@Produces: What MIME media type the data you return has. This attribute corresponds to the Accept header you have sent.
@Path: Further sub path to your resource.

In your case, getName() will always be called, because it is the first in line and there are no other annotations that differentiate both methods further. Also, since you are using REST resources, each resource must have a unique path, so you could define subresources for name and age like this:

@Path('testResponse')
public class NewClass {
    private String name = "MyName";
    private String age = "MyAge";

    @GET
    @Path("/name")
    public String getName(){
        return this.name;
    }

    @GET
    @Path("/age")
    public String getAge(){
        return this.age;
    }
}

Your resources are then available at /testResponse/name and /testResponse/age.

Look at the following example. Here, both methods share the same path, namely /testResponse, however the actual method to be called is selected by the Content-Type header you have sent in your Ajax request. If you set Content-Type: application/json, getJsonName() is called and analogously for XML and getXmlName().

@Path('testResponse')
public class NewClass {
    private String name = "MyName";
    private String age = "MyAge";

    @GET
    @Consumes("application/json")
    public String getJsonName(){
        return this.name;
    }

    @GET
    @Consumes("application/xml")
    public String getXmlName(){
        return this.name;
    }
}

You can combine this with the other annotations mentioned above. The method to be called is always the first that matches your resource path and request header attributes with the provided annotations.

Catching get request in java

There are 3 best solutions below

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