Java 类解析 JSON 数据示例

根据您提供的 JSON 数据，以下是对应的 Java 类：

import java.util.List;

public class ResponseData {
    private int code;
    private List<DataItem> data;
    private Category category;
    private UserInfo userInfo;
    private String msg;

    // getter and setter methods
}

public class DataItem {
    private int categoryId;
    private String categoryName;
    private String createTime;
    private String description;
    private int discount;
    private boolean evaluate;
    private int id;
    private String imgs;
    private String name;
    private String no;
    private int orderItemId;
    private int praise;
    private int price;
    private int realPrice;
    private boolean recommend;
    private int sales;
    private int store;

    // getter and setter methods
}

public class Category {
    private int id;
    private String name;
    private String no;

    // getter and setter methods
}

public class UserInfo {
    private int account;
    private String address;
    private String age;
    private String avatar;
    private String email;
    private int id;
    private String nickName;
    private String password;
    private List<Permission> permission;
    private String phone;
    private List<Role> role;
    private String token;
    private String username;

    // getter and setter methods
}

public class Permission {
    private String description;
    private String icon;
    private int id;
    private String name;
    private String path;

    // getter and setter methods
}

public class Role {
    // Role properties

    // getter and setter methods
}

您可以使用以上 Java 类来解析 JSON 数据。根据您的需求，可以选择使用 JSON 解析库（如 Jackson、Gson 等）将 JSON 数据转换为 Java 对象，然后通过对象的 getter 方法获取相应的值。例如，使用 Jackson 库解析 JSON 数据的示例代码如下：

import com.fasterxml.jackson.databind.ObjectMapper;

public class Main {
    public static void main(String[] args) {
        String json = '{"code":200,"data":[{"categoryId":0,"categoryName":"","createTime":"","description":"","discount":0,"evaluate":true,"id":0,"imgs":"","name":"","no":"","orderItemId":0,"praise":0,"price":0,"realPrice":0,"recommend":true,"sales":0,"store":0}],"category":{"id":8,"name":"文艺","no":"1003"},"userInfo":{"account":0,"address":"","age":"","avatar":"","email":"","id":0,"nickName":"","password":"","permission":[{"description":"","icon":"","id":0,"name":"","path":""}],"phone":"","role":[],"token":"","username":""},"msg":"成功"}';

        ObjectMapper mapper = new ObjectMapper();
        try {
            ResponseData responseData = mapper.readValue(json, ResponseData.class);
            System.out.println(responseData.getCategory().getName());
            System.out.println(responseData.getUserInfo().getUsername());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

上述示例将 JSON 字符串转换为 ResponseData 对象，并通过 getter 方法获取 Category 和 UserInfo 对象的相应值。您可以根据需要进一步处理和使用这些值。