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
- 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
data = new ArrayList (); - 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
- map.put("users", users);
- map.put("key1", "value1");
- List
- list.add(map);
- list.add("test");
- Map
- 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 = "
- 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=
xmlToJson结果：
toJson={"email":[{"address":"[email protected]","id":1}]}