标签：style blog color io ar 使用 java sp div
所使用的包：
commons-beanutils.jar
commons-collections-3.1.jar
commons-lang.jar
commons-logging-1.1.3.jar
ezmorph-1.0.jar
json-lib-2.2.2-jdk15.jar
先看json和String的互转
User.java user对象
package test; public class User { String id; String name; int age; //省略get set }
json.java
package test; import net.sf.json.JSONObject; public class Json{ public static void main(String[] args) { //String 转json String text ="{‘id‘:‘001‘,‘name‘:‘jack‘,‘age‘:22}"; JSONObject jo =JSONObject.fromObject(text); System.out.println(jo.get("id") +"__"+ jo.get("name") +"___" + jo.getInt("age"));
//String 转对象 等于是先转成json然后转对象 String text2="{‘id‘:‘002‘,‘name‘:‘lion‘,‘age‘:23}"; User u1 = (User)JSONObject.toBean(JSONObject.fromObject(text2), User.class); System.out.println(u1.getId()+"___"+u1.getName()+"__"+u1.getAge());
//对象转json User u =new User(); u.setId("003"); u.setAge(25); u.setName("Tom"); JSONObject jo2 =JSONObject.fromObject(u); System.out.println(jo2); System.out.println(jo2.get("name")); } }
打印输出
001__jack___22
002___lion__23
{"age":25,"id":"003","name":"Tom"}
Tom
给User.java 增加一个新属性book
package test; public class User { String id; String name; int age; Book book; // get set }
Book.java
package test; public class Book { String id; String name; //get set }
那么把user 转成json是什么样的呢？
package test; import net.sf.json.JSONObject; public class Json { public static void main(String[] args) { Book book =new Book(); book .setId("111"); book.setName("语文"); User u =new User(); u.setId("002"); u.setName("xim"); u.setBook(book); JSONObject jo =JSONObject.fromObject(u); System.out.println(jo); } }
输出打印
{"age":0,"book":{"id":"111","name":"语文"},"id":"002","name":"xim"}
互转方法与第一种相同。
java 使用json-lib 对象,String,json互转
标签：style blog color io ar 使用 java sp div
原文地址：http://www.cnblogs.com/Marvellous/p/4052849.html
