json对象与字符串转换操作

var json = {"a":"data1","b":"data2"};

var str = JSON.parse(json);

var json = JSON.stringify(str);

<dependency>
<groupId>org.json</groupId>
<artifactId>json</artifactId>
<version>20160212</version>
</dependency>

JSONObject obj = new JSONObject(json);
obj.put("a","data1");
obj.put("b","data2");

String str = obj.toString();

String str = "{'a':'data1','b':'data2'}";
JSONObject obj = new JSONObject(str);
System.out.println(obj.get("a"));