Java解析处理JSON

JSON格式目前是非常常用的，就不用多说了，我这里使用GOOGLE的解析库GSON。

此示例要求包中要导入GOOLE的GSON库才能使用，

位置：https://github.com/google/gson

导入之后，先创建一个User类：

Users.java文件：

/**
*
*/
package cn.you.job;

import java.util.Arrays;

/**
* @author liwei
*
*/
public class Users {
private String name;
private String nickName;
private String token;
private int age;
private String[] tags;

public String getName() {
return name;
}

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

public String getNickName() {
return nickName;
}

public void setNickName(String nickName) {
this.nickName = nickName;
}

public String getToken() {
return token;
}

public void setToken(String token) {
this.token = token;
}

public int getAge() {
return age;
}

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

public String[] getTags() {
return tags;
}

public void setTags(String[] tags) {
this.tags = tags;
}

@Override
public String toString() {
return "Users [name=" + name + ", nickName=" + nickName + ", token=" + token + ", age=" + age + ", tags="
+ Arrays.toString(tags) + "]";
}
}


再创建一个测试类，分别测试单个的和多个的。
UsersTest.java文件：

package cn.you.job;

import java.util.List;

import org.testng.Assert;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

public class UsersTest {
private final int USERS_COUNT = 10;
private Users user;
private Users[] users;
private Gson gson;

@BeforeTest
public void init() {
user = new Users();
user = new Users();
user.setName("qiaofeng");
user.setNickName("乔峰");
user.setAge(20);
user.setTags(new String[] { "帮主", "大侠", "英雄" });

users = new Users[USERS_COUNT];
for (int i = 0; i < USERS_COUNT; i++) {
users[i] = new Users();
users[i].setName("u" + i);
users[i].setNickName("nu" + i);
users[i].setAge(i);
users[i].setTags(new String[]{"t1-" + i, "t2-" + i, "t3-" + i});
}

gson = new Gson();
}

@Test
public void f1() {
System.out.println(Thread.currentThread().getStackTrace()[1].getMethodName());
System.out.println("单数据：");

String strUserAsJson = gson.toJson(user);

Assert.assertNotNull(strUserAsJson);
Assert.assertEquals(false, strUserAsJson.isEmpty());
System.out.println(strUserAsJson);

Users newUser = gson.fromJson(strUserAsJson, Users.class);
Assert.assertEquals(false, newUser == null);
System.out.println(newUser);
}

@Test
public void f2() {
System.out.println(Thread.currentThread().getStackTrace()[1].getMethodName());
System.out.println("多数据：");

String strUsersAsJson = gson.toJson(users);

Assert.assertNotNull(strUsersAsJson);
Assert.assertEquals(false, strUsersAsJson.isEmpty());
System.out.println(strUsersAsJson);

List<Users> us = gson.fromJson(strUsersAsJson, new TypeToken<List<Users>>(){}.getType());
Assert.assertNotNull(us);
Assert.assertEquals(false, us.size() <= 0);
for (int i = 0; i < us.size(); i++) {
System.out.println(us.get(i));
}
}

@AfterTest
public void release() {
user = null;
users = null;
gson = null;
}
}


运行测试，看结果：



可以看到，成功了2个，失败了0个，忽略了0个。