字符串转JSON对象并遍历JSONArray对象

柔情只为你懂 2023-06-22 08:30 160阅读 0赞

1、在pom.xml中添加依赖包

<dependency>
    			<groupId>com.alibaba</groupId>
    			<artifactId>fastjson</artifactId>
    			<version>1.2.46</version>
    		</dependency>

2、创建测试类（JSONTest3.java）

package com.jeff;
    
    import java.util.Date;
    
    import com.alibaba.fastjson.JSON;
    import com.alibaba.fastjson.JSONArray;
    import com.alibaba.fastjson.JSONObject;
    
    public class JSONTest3 { 
    
    	public static void main(String[] args) { 
    		String str = "{\"total\":12,\"code\":0,\"results\":[{\"id\":1,\"createTime\":\"2019-11-05 17:15:28\",\"createName\":\"admin\",\"modifyTime\":\"2019-11-05 17:15:28\",\"modifyName\":\"admin\",\"loginName\":\"admin\",\"password\":\"123456\",\"salt\":\"admin123456\",\"sex\":null,\"status\":1,\"name\":\"超级管理员\",\"nickName\":null,\"phone\":null,\"email\":null,\"birthday\":null,\"headimgUrl\":null,\"roleId\":1},{\"id\":2,\"createTime\":\"2019-11-05 17:15:28\",\"createName\":\"admin\",\"modifyTime\":\"2019-11-05 17:15:28\",\"modifyName\":\"admin\",\"loginName\":\"Jeff\",\"password\":\"123456\",\"salt\":\"jeff123456\",\"sex\":null,\"status\":1,\"name\":\"管理员\",\"nickName\":null,\"phone\":null,\"email\":null,\"birthday\":null,\"headimgUrl\":null,\"roleId\":2},{\"id\":3,\"createTime\":\"2019-11-05 17:15:28\",\"createName\":\"admin\",\"modifyTime\":\"2019-11-05 17:15:28\",\"modifyName\":\"admin\",\"loginName\":\"ly\",\"password\":\"123456\",\"salt\":\"ly123456\",\"sex\":null,\"status\":1,\"name\":\"刘一\",\"nickName\":null,\"phone\":null,\"email\":null,\"birthday\":null,\"headimgUrl\":null,\"roleId\":3},{\"id\":4,\"createTime\":\"2019-11-05 17:15:28\",\"createName\":\"admin\",\"modifyTime\":\"2019-11-05 17:15:28\",\"modifyName\":\"admin\",\"loginName\":\"ce\",\"password\":\"123456\",\"salt\":\"ce123456\",\"sex\":null,\"status\":1,\"name\":\"陈二\",\"nickName\":null,\"phone\":null,\"email\":null,\"birthday\":null,\"headimgUrl\":null,\"roleId\":3},{\"id\":5,\"createTime\":\"2019-11-05 17:15:28\",\"createName\":\"admin\",\"modifyTime\":\"2019-11-05 17:15:28\",\"modifyName\":\"admin\",\"loginName\":\"zs\",\"password\":\"123456\",\"salt\":\"zs123456\",\"sex\":null,\"status\":1,\"name\":\"张三\",\"nickName\":null,\"phone\":null,\"email\":null,\"birthday\":null,\"headimgUrl\":null,\"roleId\":3},{\"id\":6,\"createTime\":\"2019-11-05 17:15:28\",\"createName\":\"admin\",\"modifyTime\":\"2019-11-05 17:15:28\",\"modifyName\":\"admin\",\"loginName\":\"ls\",\"password\":\"123456\",\"salt\":\"ls123456\",\"sex\":null,\"status\":1,\"name\":\"李四\",\"nickName\":null,\"phone\":null,\"email\":null,\"birthday\":null,\"headimgUrl\":null,\"roleId\":3},{\"id\":7,\"createTime\":\"2019-11-05 17:15:28\",\"createName\":\"admin\",\"modifyTime\":\"2019-11-05 17:15:28\",\"modifyName\":\"admin\",\"loginName\":\"ww\",\"password\":\"123456\",\"salt\":\"ww123456\",\"sex\":null,\"status\":1,\"name\":\"王五\",\"nickName\":null,\"phone\":null,\"email\":null,\"birthday\":null,\"headimgUrl\":null,\"roleId\":3},{\"id\":8,\"createTime\":\"2019-11-05 17:15:28\",\"createName\":\"admin\",\"modifyTime\":\"2019-11-05 17:15:28\",\"modifyName\":\"admin\",\"loginName\":\"zl\",\"password\":\"123456\",\"salt\":\"zl123456\",\"sex\":null,\"status\":1,\"name\":\"赵六\",\"nickName\":null,\"phone\":null,\"email\":null,\"birthday\":null,\"headimgUrl\":null,\"roleId\":3},{\"id\":9,\"createTime\":\"2019-11-05 17:15:28\",\"createName\":\"admin\",\"modifyTime\":\"2019-11-05 17:15:28\",\"modifyName\":\"admin\",\"loginName\":\"sq\",\"password\":\"123456\",\"salt\":\"sq123456\",\"sex\":null,\"status\":1,\"name\":\"孙七\",\"nickName\":null,\"phone\":null,\"email\":null,\"birthday\":null,\"headimgUrl\":null,\"roleId\":3},{\"id\":10,\"createTime\":\"2019-11-05 17:15:28\",\"createName\":\"admin\",\"modifyTime\":\"2019-11-05 17:15:28\",\"modifyName\":\"admin\",\"loginName\":\"zb\",\"password\":\"123456\",\"salt\":\"zb123456\",\"sex\":null,\"status\":1,\"name\":\"周八\",\"nickName\":null,\"phone\":null,\"email\":null,\"birthday\":null,\"headimgUrl\":null,\"roleId\":3}]}";
    		stringToJsonBean(str);
    	}
    
    	/** * * @description: 字符串转JSON对象 * @author: Jeff * @date: 2019年12月15日 * @param str JSON字符串 */
    	public static void stringToJsonBean(String str) { 
    		JSONObject jsonObject = JSON.parseObject(str);
    		Long total = jsonObject.getLong("total");
    		Integer code = jsonObject.getInteger("code");
    		System.out.println("total：" + total + "，code：" + code);
    		JSONArray jsonArray = jsonObject.getJSONArray("results");
    		forJSONArray(jsonArray);
    	}
    
    	/** * * @description: 遍历JSONArray对象 * @author: Jeff * @date: 2019年12月15日 * @param jsonArray JSONArray对象 */
    	public static void forJSONArray(JSONArray jsonArray) { 
    		if (jsonArray.size() > 0) { 
    			for (int i = 0; i < jsonArray.size(); i++) { 
    				// 遍历 jsonArray 数组，把每一个对象转成 json 对象
    				JSONObject jsonObject = jsonArray.getJSONObject(i);
    				Long id = jsonObject.getLong("id");
    				String loginName = jsonObject.getString("loginName");
    				String name = jsonObject.getString("name");
    				Integer status = jsonObject.getInteger("status");
    				Date createTime = jsonObject.getDate("createTime");
    				System.out.println("id：" + id + "，loginName：" + loginName + "，,name：" + name + "，,status：" + status
    						+ "，,createTime：" + createTime);
    			}
    		}
    	}
    
    }

3、控制台输出结果  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTczOTcyMA_size_16_color_FFFFFF_t_70]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTczOTcyMA_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20191215164741183.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTczOTcyMA==,size_16,color_FFFFFF,t_70