Here you can find the source of formatJson(Object object)
public static String formatJson(Object object) throws IOException
//package com.java2s; /*// w w w . j a v a 2 s . co m Copyright 2012 Twitter, Inc. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ import java.io.IOException; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.databind.SerializationFeature; public class Main { public static String formatJson(Object object) throws IOException { ObjectMapper om = new ObjectMapper(); om.enable(SerializationFeature.INDENT_OUTPUT); om.disable(SerializationFeature.FAIL_ON_EMPTY_BEANS); return om.writeValueAsString(object); } }