地址：https://blog.youkuaiyun.com/u011019141/article/details/76579019
/**
* 项目名称：tools
* 项目包名：com.songfayuantools.json
* 创建时间：2017年7月31日上午11:58:51
* 创建者：Administrator-宋发元
* 创建地点：
*/
package com.songfayuantools.json;
import com.songfayuantools.entity.UserInfo;
import net.sf.json.JSON;
import net.sf.json.JSONObject;
import net.sf.json.xml.XMLSerializer;
/**
* 描述：JSONObject使用方法详解
* JSONObject-lib包是一个beans,collections,maps,java arrays和xml和JSON互相转换的包。
* @author songfayuan
* 2017年7月31日上午11:58:51
*/
public class Json {
/**
* 描述：json字符串转java代码
* @author songfayuan
* 2017年8月2日下午2:24:47
*/
public static void jsonToJava() {
System.out.println("json字符串转java代码");
String jsonStr = "{\"password\":\"123456\",\"username\":\"张三\"}";
JSONObject jsonObject = JSONObject.fromObject(jsonStr);
String username = jsonObject.getString("username");
String password = jsonObject.getString("password");
System.err.println("json--->java \n username="+username+"\t passwor="+password);
}
/**
* 描述：java代码封装为json字符串
* @author songfayuan
* 2017年8月2日下午2:30:58
*/
public static void javaToJSON() {
System.out.println("java代码封装为json字符串");
JSONObject jsonObject = new JSONObject();
jsonObject.put("username", "宋发元");
jsonObject.put("age", 24);
jsonObject.put("sex", "男");
System.out.println("java--->json \n " + jsonObject.toString());
}
/**
* 描述：json字符串转xml字符串
* @author songfayuan
* 2017年8月2日下午2:56:30
*/
public static void jsonToXML() {
System.out.println("json字符串转xml字符串");
String jsonStr = "{\"username\":\"宋发元\",\"password\":\"123456\",\"age\":\"24\"}";
JSONObject jsonObject = JSONObject.fromObject(jsonStr);
XMLSerializer xmlSerializer = new XMLSerializer();
xmlSerializer.setRootName("user_info");
xmlSerializer.setTypeHintsEnabled(false);
String xml = xmlSerializer.write(jsonObject);
System.out.println("json--->xml \n" + xml);
}
/**
* 描述：xml字符串转json字符串
* @author songfayuan
* 2017年8月2日下午3:19:25
*/
public static void xmlToJSON() {
System.out.println("xml字符串转json字符串");
String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><user_info><password>123456</password><username>宋发元</username></user_info>";
XMLSerializer xmlSerializer = new XMLSerializer();
JSON json = xmlSerializer.read(xml);
System.out.println("xml--->json \n" + json.toString());
}
/**
* 描述：javaBean转json字符串
* @author songfayuan
* 2017年8月2日下午3:39:10
*/
public static void javaBeanToJSON() {
System.out.println("javaBean转json字符串");
UserInfo userInfo = new UserInfo();
userInfo.setUsername("宋发元");
userInfo.setPassword("123456");
JSONObject jsonObject = JSONObject.fromObject(userInfo);
System.out.println("JavaBean-->json \n" + jsonObject.toString());
}
/**
* 描述：javaBean转xml字符串
* @author songfayuan
* 2017年8月2日下午3:48:08
*/
public static void javaBeanToXML() {
System.out.println("javaBean转xml字符串");
UserInfo userInfo = new UserInfo();
userInfo.setUsername("songfayuan");
userInfo.setPassword("66666");
JSONObject jsonObject = JSONObject.fromObject(userInfo);
XMLSerializer xmlSerializer = new XMLSerializer();
String xml = xmlSerializer.write(jsonObject, "UTF-8");
System.out.println("javaBean--->xml \n" + xml);
}
public static void main(String args[]) {
// jsonToJava();
// javaToJSON();
// jsonToXML();
// xmlToJSON();
// javaBeanToJSON();
javaBeanToXML();
}
}
实体
/**
* 项目名称：tools
* 项目包名：com.songfayuantools.entity
* 创建时间：2017年8月2日下午3:34:46
* 创建者：Administrator-宋发元
* 创建地点：
*/
package com.songfayuantools.entity;
/**
* 描述：实体
*
* @author songfayuan 2017年8月2日下午3:34:46
*/
public class UserInfo {
public String username;
public String password;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
maven引入资源
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>tools</groupId>
<artifactId>tools</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>tools Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- <dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.8</version>
</dependency> -->
<!-- https://mvnrepository.com/artifact/net.sf.json-lib/json-lib -->
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-lang/commons-lang -->
<dependency>
<groupId>commons-lang</groupId>
<artifactId>commons-lang</artifactId>
<version>2.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-logging/commons-logging -->
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-beanutils/commons-beanutils -->
<dependency>
<groupId>commons-beanutils</groupId>
<artifactId>commons-beanutils</artifactId>
<version>1.9.3</version>
</dependency>
<!-- https://mvnrepository.com/artifact/commons-collections/commons-collections -->
<dependency>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
<version>3.2.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/net.sf.ezmorph/ezmorph -->
<dependency>
<groupId>net.sf.ezmorph</groupId>
<artifactId>ezmorph</artifactId>
<version>1.0.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/xom/xom -->
<dependency>
<groupId>xom</groupId>
<artifactId>xom</artifactId>
<version>1.2.5</version>
</dependency>
</dependencies>
<build>
<finalName>tools</finalName>
</build>
</project>
==========================================
JSONObject jo = JSONObject.fromObject(map);
常见的java代码转换成json
--请注意，这个方法在对Object转换的时候是按照domain类中的所有getXXX()方法进行转换的。如果你在类中写了非属性的getXXX()方法，那么返回给你的就会有XXX属性了。
--使用net.sf.json.*下的类（jar包是json-lib-x.x.jar）
1. List集合转换成json代码
List list = new ArrayList();
list.add( "first" );
list.add( "second" );
JSONArray jsonArray2 = JSONArray.fromObject( list );
2. Map集合转换成json代码
Map map = new HashMap();
map.put("name", "json");
map.put("bool", Boolean.TRUE);
map.put("int", new Integer(1));
map.put("arr", new String[] { "a", "b" });
map.put("func", "function(i){ return this.arr[i]; }");
JSONObject json = JSONObject.fromObject(map);
3. Bean转换成json代码
JSONObject jsonObject = JSONObject.fromObject(new JsonBean());
4. 数组转换成json代码
boolean[] boolArray = new boolean[] { true, false, true };
JSONArray jsonArray1 = JSONArray.fromObject(boolArray);
5. 一般数据转换成json代码
JSONArray jsonArray3 = JSONArray.fromObject("['json','is','easy']" );
================================================================================
public static void main(String[] args) {
Map map=new HashMap();
map.put("我","妹");
map.put("擦","哇");
map.put("你","呀");
JSONObject json = JSONObject.fromObject(map);
System.out.println(json);
}
輸出的結果 {"我":"妹","擦":"哇","你":"呀"}
toBean();
首先一个javabean对象
public class Student {
private int id ;
private String name;
private int age;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String toString(){
return this.id + ", " + this.name + ", " + this.age;
}
}
然后测试toBean方法的类
import net.sf.json.JSONObject;
public class ToBeanTest {
public static void main(String[] args) {
String json = "{id:'1001',name:'张三',age:'22'}";
Student stu = new Student();
JSONObject obj = JSONObject.fromObject(json);
stu = (Student)JSONObject.toBean(obj, Student.class);
System.out.println(stu);
}
}
输出结果为1001, 张三, 22
然后我们在修改修改
import net.sf.json.JSONObject;
public class ToBeanTest {
public static void main(String[] args) {
String json = "{id:'1001',name:'张三'}";
Student stu = new Student();
JSONObject obj = JSONObject.fromObject(json);
stu = (Student)JSONObject.toBean(obj, Student.class);
System.out.println(stu);
}
}
把年龄给去掉age为int型，输出结果为：1001, 张三, 0
然后再做小小改动
import net.sf.json.JSONObject;
public class ToBeanTest {
public static void main(String[] args) {
String json = "{id:'1001',age:'22'}";
Student stu = new Student();
JSONObject obj = JSONObject.fromObject(json);
stu = (Student)JSONObject.toBean(obj, Student.class);
System.out.println(stu);
}
}
把姓名给去掉name为String型，输出结果为：1001, null, 22
再改动一下：
import net.sf.json.JSONObject;
public class ToBeanTest {
public static void main(String[] args) {
String json = "{id:'1001',name:'张三',age:'nn'}";
Student stu = new Student();
JSONObject obj = JSONObject.fromObject(json);
stu = (Student)JSONObject.toBean(obj, Student.class);
System.out.println(stu);
}
}
把age改成非整形，输出结果为：
1001, 张三, 0
再改动一下：
import net.sf.json.JSONObject;
public class ToBeanTest {
public static void main(String[] args) {
String json = "{id:'1001',name:'张三',age:'22',sex:'男'}";
Student stu = new Student();
JSONObject obj = JSONObject.fromObject(json);
stu = (Student)JSONObject.toBean(obj, Student.class);
System.out.println(stu);
}
}
加了一个sex:'男'的一对键值，输出结果为：
1001, 张三, 22
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