json-lib库用法

json-lib依赖

json-lib-2.3-jdk15.jar
=======================
commons-collections-3.1.jar
commons-beanutils.jar
ezmorph-1.0.4.jar
commons-logging-1.1.jar
commons-lang-2.3.jar
xom-1.1.jar

 

package json;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.beanutils.PropertyUtils;


import net.sf.ezmorph.bean.MorphDynaBean;
import net.sf.json.JSON;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.xml.XMLSerializer;

public class JSONTest {

    private static String jsonStr = "{/"id/": 1, /"name/": /"haha/", /"email/": [{/"id/": 1, /"address/": /"[email protected]/"}, {/"id/": 2, /"address/": /"[email protected]/"}]}";

    public static class User {

        private String name;
        private int age;

        public User() {

        }

        public User(String n, int a) {
            this.name = n;
            this.age = a;
        }

        public void setName(String n) {
            this.name = n;
        }

        public void setAge(int a) {
            this.age = a;
        }

        public String getName() {
            return name;
        }

        public int getAge() {
            return age;
        }

    }

    private static User[] getUsers() {
        return new User[] {
                new User("name1", 11),
                new User("name2", 22),
                new User("name3", 33)
        };
    }

    private static void printValueFromJsonStr() {
         System.out.println(jsonStr);
         JSONObject jsonObj = JSONObject.fromObject(jsonStr);
         String name = jsonObj.getString("name");
         System.out.println("name=" + name);
         JSONArray jsonArr = jsonObj.getJSONArray("email");
         for (int i = 0; i < jsonArr.size(); i++) {
             JSONObject jObj = jsonArr.getJSONObject(i);
             System.out.println("address=" + jObj.getString("address"));
         }
    }

    private static void strToJsonArray() {
        String str = "['1','2','3']";
        JSONArray arr = JSONArray.fromObject(str);
        System.out.println("strToJsonArray=" + arr.toString());
    }

    private static void printValueFromJsonStr1() {
        System.out.println(jsonStr);
        JSONObject jsonObj = JSONObject.fromObject(jsonStr);
        Object bean = JSONObject.toBean(jsonObj);
        try {
            String name = (String)PropertyUtils.getProperty(bean, "name");
            Object email = PropertyUtils.getIndexedProperty(bean, "email", 1);
            String addr = (String)PropertyUtils.getProperty(email, "address");
            System.out.println("class=" + email.getClass() + ";addr=" + addr);
            MorphDynaBean eBean = (MorphDynaBean)email;
            System.out.println("printValueFromJsonStr1=" + name);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static void strToBean() {
        String str = "{/"name/": /"haha/", /"age/": 26}";
        JSONObject obj = JSONObject.fromObject(str);
        User bean = (User)obj.toBean(obj, User.class);
        System.out.println("name=" + bean.getName() + ";age=" + bean.getAge());
    }

    private static void mapToJson() {
        Map<String, String> map = new HashMap<String, String>();
        map.put("key1", "value1");
        map.put("key2", "value2");
        map.put("key3", "value3");
        JSONObject jsonObj = JSONObject.fromObject(map);
        System.out.println("Map=" + jsonObj.toString());
    }

    private static void arrayToJson() {
        User[] users = getUsers();
        JSONArray jsonArr = JSONArray.fromObject(users);
        System.out.println("Array=" + jsonArr.toString());
    }

    private static void listToJson() {
        User[] users = getUsers();
        List<User> data = new ArrayList<User>();
        for (int i = 0; i < users.length; i++) {
            data.add(users[i]);
        }
        JSONArray jsonArr = JSONArray.fromObject(data);
        System.out.println("List=" + jsonArr.toString());
    }

    private static void objectToJson() {
        User user = new User("name", 26);
        JSONObject jsonObj = JSONObject.fromObject(user);
        System.out.println("Object=" + jsonObj.toString());
    }

    private static void combineToJson() {
        User[] users = getUsers();
        Map<String, Object> map = new HashMap<String, Object>();
        map.put("users", users);
        map.put("key1", "value1");
        List<Object> list = new ArrayList<Object>();
        list.add(map);
        list.add("test");
        Map<String, Object> outerMap = new HashMap<String, Object>();
        outerMap.put("list", list);
        outerMap.put("flag", "outer");
        JSONObject jsonObj = JSONObject.fromObject(outerMap);
        System.out.println("Combine=" + jsonObj.toString());
    }

    private static void jsonToXml() {
        System.out.println(jsonStr);
        JSONObject jsonObj = JSONObject.fromObject(jsonStr);
        XMLSerializer x = new XMLSerializer();
        String xml = x.write(jsonObj);
        System.out.println("toXml=" + xml);
    }

    private static void xmlToJson() {
        String xml = "<o><email class='array'><e class='object'><address type='string'>[email protected]</address><id type='number'>1</id></e></email></o>";
        XMLSerializer x = new XMLSerializer();
        JSON json = x.read(xml);
        System.out.println("toJson=" + json.toString());
    }

    public static void main(String[] args) {
        printValueFromJsonStr();
        printValueFromJsonStr1();
        strToJsonArray();
        strToBean();
        mapToJson();
        arrayToJson();
        listToJson();
        objectToJson();
        combineToJson();
        jsonToXml();
        xmlToJson();
    }

}

  

 

printValueFromJsonStr方法结果：

{"id": 1, "name": "haha", "email": [{"id": 1, "address": "[email protected]"}, {"id": 2, "address": "[email protected]"}]}

name=haha
[email protected]
[email protected]

printValueFromJsonStr1方法结果：

{"id": 1, "name": "haha", "email": [{"id": 1, "address": "[email protected]"}, {"id": 2, "address": "[email protected]"}]}
class=class net.sf.ezmorph.bean.MorphDynaBean;[email protected]
printValueFromJsonStr1=haha

strToJsonArray方法结果：

strToJsonArray=["1","2","3"]

strToBean结果：

name=haha;age=26

mapToJson结果：

Map={"key3":"value3","key2":"value2","key1":"value1"}

arrayToJson结果：

Array=[{"age":11,"name":"name1"},{"age":22,"name":"name2"},{"age":33,"name":"name3"}]

listToJson结果：

List=[{"age":11,"name":"name1"},{"age":22,"name":"name2"},{"age":33,"name":"name3"}]

objectToJson结果：

Object={"age":26,"name":"name"}

combineToJson结果：

Combine={"flag":"outer","list":[{"users":[{"age":11,"name":"name1"},{"age":22,"name":"name2"},{"age":33,"name":"name3"}],"key1":"value1"},"test"]}

jsonToXml结果：

{"id": 1, "name": "haha", "email": [{"id": 1, "address": "[email protected]"}, {"id": 2, "address": "[email protected]"}]}
toXml=<?xml version="1.0" encoding="UTF-8"?>
<o><email class="array"><e class="object"><address type="string">[email protected]</address><id type="number">1</id></e><e class="object"><address type="string">[email protected]</address><id type="number">2</id></e></email><id type="number">1</id><name type="string">haha</name></o>

xmlToJson结果：

toJson={"email":[{"address":"[email protected]","id":1}]}