List＜Map＜String, Object＞＞转List＜T＞ list map对象转list对象

拼搏现实的明天。 2024-03-27 10:24 18阅读 0赞

#### 文章目录 ####

*  前言
 *  代码如下 :
 *   *  list map对象转list对象
     *  map转对象
 *  总结

## 前言 ##

**我们在处理数据的时候，经常用到map对象转java对象。**

--------------------

## 代码如下 : ##

### list map对象转list对象 ###

**要转换的对象**

@Data
    @AllArgsConstructor
    @NoArgsConstructor
    public class User {
        
       private String name;
       private int age;
    }

public static void main(String[] args) {
        
            List<Map<String, Object>> listMap = new ArrayList<>();
            Map<String, Object> map1 = new HashMap<String, Object>();
            map1.put("name", "李思思");
            map1.put("age", 26);
            Map<String, Object> map2 = new HashMap<String, Object>();
            map2.put("name", "宋圆圆");
            map2.put("age", 25);
            Map<String, Object> map3 = new HashMap<String, Object>();
            map3.put("name", "苏小小");
            map3.put("age", 25);
     
            listMap.add(map1);
            listMap.add(map2);
            listMap.add(map3);

JSONArray jsonArray = new JSONArray();
            jsonArray.addAll(listMap);
            List<User> list = jsonArray.toJavaList(User.class);
            for (User user : list) {
        
                System.out.println(user.getName()+"======"+user.getAge());
            }

![在这里插入图片描述][bb1ffae96d8d439f88ca14b7c2b245f1.png]

### map转对象 ###

JSONObject jsonObject = new JSONObject();
              jsonObject.putAll(map1);
              User user = jsonObject.toJavaObject(User.class);

> **pom文件JSON包 :**

<dependency>
                    <groupId>com.alibaba</groupId>
                    <artifactId>fastjson</artifactId>
                    <version>1.2.83</version>
                </dependency>

--------------------

## 总结 ##

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[参考1][1]  
[参考2][2]

[bb1ffae96d8d439f88ca14b7c2b245f1.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/444eaff19038496aa75b23707376d1cf.png
[1]: https://blog.csdn.net/m0_67393295/article/details/126737941?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_baidulandingword~default-0-126737941-blog-125263025.pc_relevant_multi_platform_whitelistv4&spm=1001.2101.3001.4242.1&utm_relevant_index=3
[2]: https://blog.csdn.net/sdgames/article/details/107494412