字符串 转换成 Java对象

public static void jsonStrToJava(){
//定义两种不同格式的字符串
String objectStr="{"name":"JSON","age":"24","address":"北京市西城区"}";
String arrayStr="[{"name":"JSON","age":"24","address":"北京市西城区"}]";
//1、使用JSONObject
JSONObject jsonObject=JSONObject.fromObject(objectStr);
Student stu=(Student)JSONObject.toBean(jsonObject, Student.class);
//2、使用JSONArray
JSONArray jsonArray=JSONArray.fromObject(arrayStr);
//获得jsonArray的第一个元素
Object o=jsonArray.get(0);
JSONObject jsonObject2=JSONObject.fromObject(o);
Student stu2=(Student)JSONObject.toBean(jsonObject2, Student.class);
System.out.println("stu:"+stu);
System.out.println("stu2:"+stu2);
}

打印结果为：

stu:Student [name=JSON, age=24, address=北京市西城区]
stu2:Student [name=JSON, age=24, address=北京市西城区]

要导包：

 <dependency>  
            <groupId>net.sf.json-lib</groupId>  
            <artifactId>json-lib</artifactId>  
            <version>2.2.3</version>  
            <classifier>jdk15</classifier>  
 </dependency>