介绍几款常用的Json转换工具

　　一、Jackson

　　1、引入依赖

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.10.0</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.10.0</version>
</dependency>
<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-core</artifactId>
    <version>2.10.0</version>
</dependency>

　　2、使用示例

ObjectMapper mapper = new ObjectMapper();

//（序列化）对象转json字符串
String userStr = mapper.writeValueAsString(user);
//（反序列化）json字符串转对象
User user= mapper.readValue(userStr,User.class);

//List的序列化与反序列化
List<User> userlist = new ArrayList<>();
... ...
userlist.add(user);
userlist.add(user2);
//转字符串用法一样
String userListStr = mapper.writeValueAsString(userlist);
//转对象使用TypeReference，否则报LinkedHashMap类型转换错误
List<User> userList = mapper.readValue(userListStr,new TypeReference<List<User>>(){});
System.out.println(userList.get(0).getUserName());

标签：mapper,转换,core,userlist,Json,new,jackson,序列化,几款
来源： https://www.cnblogs.com/javasl/p/13025872.html