将字符串转换成json格式

1.引入json依赖,在pom.xml文件里添加如下内容

 <!--Json array start -->
         <dependency>
             <groupId>commons-beanutils</groupId>
             <artifactId>commons-beanutils</artifactId>
             <version>1.7.0</version>
         </dependency>
         <dependency>
             <groupId>commons-collections</groupId>
             <artifactId>commons-collections</artifactId>
             <version>3.1</version>
         </dependency>
         <dependency>
             <groupId>commons-lang</groupId>
             <artifactId>commons-lang</artifactId>
             <version>2.5</version>
         </dependency>
         <dependency>
             <groupId>net.sf.ezmorph</groupId>
             <artifactId>ezmorph</artifactId>
             <version>1.0.3</version>
         </dependency>
         <dependency>
             <groupId>net.sf.json-lib</groupId>
             <artifactId>json-lib</artifactId>
             <version>2.4</version>
             <classifier>jdk15</classifier>
         </dependency>
         <!--Json array end -->

2.List集合转换成json代码

     List list = new ArrayList();
     list.add( "first" );
     list.add( "second" );
     JSONArray jsonArray2 = JSONArray.fromObject( list );

3. Map集合转换成json代码

     Map map = new HashMap();
     map.put("name", "json");
     map.put("bool", Boolean.TRUE);
     map.put("int", new Integer(1));
     map.put("arr", new String[] { "a", "b" });
     map.put("func", "function(i){ return this.arr[i]; }");
     JSONObject json = JSONObject.fromObject(map);

4.Bean转换成json代码

 JSONObject jsonObject = JSONObject.fromObject(new JsonBean());

5.数组转换成json代码

     boolean[] boolArray = new boolean[] { true, false, true };
     JSONArray jsonArray1 = JSONArray.fromObject(boolArray);

6.一般数据转换成json代码

 JSONArray jsonArray3 = JSONArray.fromObject("['json','is','easy']" );

7.beans转换成json代码

     List list = new ArrayList();
     JsonBean2 jb1 = new JsonBean2();
     jb1.setCol(1);
     jb1.setRow(1);
     jb1.setValue("xx");
     JsonBean2 jb2 = new JsonBean2();
     jb2.setCol(2);
     jb2.setRow(2);
     jb2.setValue("");
     list.add(jb1);
     list.add(jb2);
     JSONArray ja = JSONArray.fromObject(list);