XStream - Writing JSON using XStream


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XStream supports JSON by initializing XStream object with an appropriate driver. XStream currently supports JettisonMappedXmlDriver and JsonHierarchicalStreamDriver.

Let us now test the code with json handling in XStream.

Create a java class file named XStreamTester in C:\>XStream_WORKSPACE\com\tutorialspoint\xstream.

File: XStreamTester.java

package com.tutorialspoint.xstream;

import java.io.Writer;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.annotations.XStreamAlias;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
import com.thoughtworks.xstream.io.json.JsonHierarchicalStreamDriver;
import com.thoughtworks.xstream.io.json.JsonWriter;

public class XStreamTester {
   public static void main(String args[]){
   
      XStreamTester tester = new XStreamTester();
      XStream xstream = new XStream(new JsonHierarchicalStreamDriver() {
      
         public HierarchicalStreamWriter createWriter(Writer writer) {
            return new JsonWriter(writer, JsonWriter.DROP_ROOT_MODE);
         }
      });
      
      Student student = new Student("Mahesh","Parashar");
      
      xstream.setMode(XStream.NO_REFERENCES);
      xstream.alias("student", Student.class);
      
      System.out.println(xstream.toXML(student));
   }
}

@XStreamAlias("student")
class Student {

   private String firstName;
   private String lastName;
   
   public Student(String firstName, String lastName) {
      this.firstName = firstName;
      this.lastName = lastName;
   }
   
   public String getFirstName() {
      return firstName;
	}

	public String getLastName() {
		return lastName;
	}   
	
	public String toString(){
		return "Student [ firstName: "+firstName+", lastName: "+ lastName+ " ]";
	}	
}

Verify the Result

Compile the classes using javac compiler as follows:

C:\XStream_WORKSPACE\com\tutorialspoint\xstream>javac XStreamTester.java

Now run the XStreamTester to see the result:

C:\XStream_WORKSPACE\com\tutorialspoint\xstream>java XStreamTester

Verify the output as follows:

{
   "firstName": "Mahesh",
   "lastName": "Parashar"
}


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