直接给代码：
package fastJson.test;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
public class FastJsonTest1
{
/**
* 数组转json格式字符串
*/
public void array2Json(){
String[] arr = {"bill","green","maks","jim"};
String jsonText = JSON.toJSONString(arr, true);
System.out.println("array2Json()方法：jsonText=="+jsonText);
// 输出结果：jsonText==["bill","green","maks","jim"]
}
/**
* json格式字符串转数组
*/
public void json2Array(){
String jsonText = "[\"bill\",\"green\",\"maks\",\"jim\"]";
JSONArray jsonArr = JSON.parseArray(jsonText);
System.out.println("json2Array()方法：jsonArr=="+jsonArr);
// 输出结果：jsonArr==["bill","green","maks","jim"]
}
/**
* 数组转json格式字符串
*/
public void array2Json2(){
User user1 = new User("P001","TOM",16);
User user2 = new User("P002","JACKSON",21);
User user3 = new User("P003","MARTIN",20);
User[] userArr = {user1,user2,user3};
String jsonText = JSON.toJSONString(userArr, true);
System.out.println("array2Json2()方法：jsonText=="+jsonText);
//输出结果：jsonText==[{"age":16,"id":"P001","name":"TOM"},{"age":21,"id":"P002","name":"JACKSON"},{"age":20,"id":"P003","name":"MARTIN"}]
}
/**
* json格式字符串转数组
*/
public void json2Array2(){
String jsonText = "[{\"age\":16,\"id\":\"P001\",\"name\":\"TOM\"},{\"age\":21,\"id\":\"P002\",\"name\":\"JACKSON\"},{\"age\":20,\"id\":\"P003\",\"name\":\"MARTIN\"}]";
JSONArray jsonArr = JSON.parseArray(jsonText);
System.out.println("json2Array2()方法：jsonArr=="+jsonArr);
// 输出结果：jsonArr==[{"age":16,"id":"P001","name":"TOM"},{"age":21,"id":"P002","name":"JACKSON"},{"age":20,"id":"P003","name":"MARTIN"}]
}
/**
* list集合转json格式字符串
*/
public void list2Json(){
List list = new ArrayList();
User user1 = new User("L001","TOM",16);
list.add(user1);
User user2 = new User("L002","JACKSON",21);
list.add(user2);
User user3 = new User("L003","MARTIN",20);
list.add(user3);
String jsonText = JSON.toJSONString(list, true);
System.out.println("list2Json()方法：jsonText=="+jsonText);
//输出结果：jsonText==[{"age":16,"id":"L001","name":"TOM"},{"age":21,"id":"L002","name":"JACKSON"},{"age":20,"id":"L003","name":"MARTIN"}]
}
/**
* list集合转json格式字符串
*/
public void list2Json2(){
List list = new ArrayList();
Address address1 = new Address("广东省","深圳市","科苑南路","580053");
User user1 = new User("L001","TOM",16,address1);
list.add(user1);
Address address2 = new Address("江西省","南昌市","阳明路","330004");
User user2 = new User("L002","JACKSON",21,address2);
list.add(user2);
Address address3 = new Address("陕西省","西安市","长安南路","710114");
User user3 = new User("L003","MARTIN",20,address3);
list.add(user3);
String jsonText = JSON.toJSONString(list, true);
System.out.println("list2Json2()方法：jsonText=="+jsonText);
//输出结果：jsonText==[{"address":{"city":"深圳市","post":"580053","province":"广东省","street":"科苑南路"},"age":16,"id":"L001","name":"TOM"},{"address":{"city":"南昌市","post":"330004","province":"江西省","street":"阳明路"},"age":21,"id":"L002","name":"JACKSON"},{"address":{"city":"西安市","post":"710114","province":"陕西省","street":"长安南路"},"age":20,"id":"L003","name":"MARTIN"}]
}
/**
* map转json格式字符串
*/
public void map2Json(){
Map map = new HashMap();
Address address1 = new Address("广东省","深圳市","科苑南路","580053");
map.put("address1", address1);
Address address2 = new Address("江西省","南昌市","阳明路","330004");
map.put("address2", address2);
Address address3 = new Address("陕西省","西安市","长安南路","710114");
map.put("address3", address3);
String jsonText = JSON.toJSONString(map, true);
System.out.println("map2Json()方法：jsonText=="+jsonText);
//输出结果：jsonText=={"address1":{"city":"深圳市","post":"580053","province":"广东省","street":"科苑南路"},"address2":{"city":"南昌市","post":"330004","province":"江西省","street":"阳明路"},"address3":{"city":"西安市","post":"710114","province":"陕西省","street":"长安南路"}}
}
public static void main(String[] args)
{
FastJsonTest1 test = new FastJsonTest1();
//数组转json格式字符串
test.array2Json();
//json格式字符串转数组
test.json2Array();
//数组转json格式字符串
test.array2Json2();
//json格式字符串转数组
test.json2Array2();
//list集合转json格式字符串
test.list2Json();
//list集合转json格式字符串
test.list2Json2();
//map转json格式字符串
test.map2Json();
}
}
控制台输出结果：
array2Json()方法：jsonText==["bill","green","maks","jim"]
json2Array()方法：jsonArr==["bill","green","maks","jim"]
array2Json2()方法：jsonText==[{
"age":16,
"id":"P001",
"name":"TOM"
},{
"age":21,
"id":"P002",
"name":"JACKSON"
},{
"age":20,
"id":"P003",
"name":"MARTIN"
}]
json2Array2()方法：jsonArr==[{"age":16,"id":"P001","name":"TOM"},{"age":21,"id":"P002","name":"JACKSON"},{"age":20,"id":"P003","name":"MARTIN"}]
list2Json()方法：jsonText==[
{
"age":16,
"id":"L001",
"name":"TOM"
},
{
"age":21,
"id":"L002",
"name":"JACKSON"
},
{
"age":20,
"id":"L003",
"name":"MARTIN"
}
]
list2Json2()方法：jsonText==[
{
"address":{
"city":"深圳市",
"post":"580053",
"province":"广东省",
"street":"科苑南路"
},
"age":16,
"id":"L001",
"name":"TOM"
},
{
"address":{
"city":"南昌市",
"post":"330004",
"province":"江西省",
"street":"阳明路"
},
"age":21,
"id":"L002",
"name":"JACKSON"
},
{
"address":{
"city":"西安市",
"post":"710114",
"province":"陕西省",
"street":"长安南路"
},
"age":20,
"id":"L003",
"name":"MARTIN"
}
]
map2Json()方法：jsonText=={"address1":{
"city":"深圳市",
"post":"580053",
"province":"广东省",
"street":"科苑南路"
},"address2":{
"city":"南昌市",
"post":"330004",
"province":"江西省",
"street":"阳明路"
},"address3":{
"city":"西安市",
"post":"710114",
"province":"陕西省",
"street":"长安南路"
}}
附：javabean类 User.java
package fastJson.test;
import java.io.Serializable;
public class User implements Serializable {
private static final long serialVersionUID = 1L;
private String id;
private String name;
private int age;
private Address address;
public User() {
super();
}
public User(String id, String name, int age) {
super();
this.id = id;
this.name = name;
this.age = age;
}
public User(String id, String name, int age, Address address)
{
super();
this.id = id;
this.name = name;
this.age = age;
this.address = address;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Address getAddress()
{
return address;
}
public void setAddress(Address address)
{
this.address = address;
}
}
Address.java
package fastJson.test;
import java.io.Serializable;
public class Address implements Serializable
{
private static final long serialVersionUID = 1L;
private String province;
private String city;
private String street;
private String post;
public Address()
{
super();
}
public Address(String province, String city, String street, String post)
{
super();
this.province = province;
this.city = city;
this.street = street;
this.post = post;
}
public String getCity()
{
return city;
}
public void setCity(String city)
{
this.city = city;
}
public String getPost()
{
return post;
}
public void setPost(String post)
{
this.post = post;
}
public String getProvince()
{
return province;
}
public void setProvince(String province)
{
this.province = province;
}
public String getStreet()
{
return street;
}
public void setStreet(String street)
{
this.street = street;
}
}
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