把JSON字符串转换为List

最新推荐文章于 2024-07-05 13:47:27 发布

原创最新推荐文章于 2024-07-05 13:47:27 发布 · 2.3k 阅读

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本文介绍了一种使用Java处理JSON字符串的方法，并演示了如何将JSON字符串映射到自定义实体类的过程。通过实例展示了创建JSON字符串、定义实体类及使用ObjectMapper进行解析的具体步骤。

1.JSON字符串
String content = "[{" +
" \"key\": \"UserRole\"," +
" \"name\": \"员工角色\"" +
"}, {" +
" \"key\": \"RolePermission\"," +
" \"name\": \"角色权限\"" +
"}]";

2.映射实体

public class PermissionContent implements Serializable {
    private static final long serialVersionUID = 8891095994295070691L;
    private String key;
    private String name;

}

3.使用ObjectMapper

ObjectMapper mapper = new ObjectMapper();
CollectionType listType = mapper.getTypeFactory().constructCollectionType(ArrayList.class, PermissionContent.class);
List<PermissionContent> userList = mapper.readValue(content, listType);
System.out.println(userList.get(0).getKey());