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}]}