项目--后端--封装

梦里梦外; 2022-11-27 07:03 152阅读 0赞

原文网址：[项目--后端--封装\_IT利刃出鞘的博客-CSDN博客\_后端代码封装][--_--_IT_-CSDN]

# 封装返回值 #

## 简单写法（无static） ##

import lombok.Data;
    
    @Data
    public class Result<T> {
        private boolean success = true;
    
        private int code = 1000;
    
        private String message;
    
        private T data;
    
        public Result() {
        }
    
        public Result(boolean success) {
            this.success = success;
        }
    
        public Result<T> success(boolean success) {
            Result<T> result = new Result<>(success);
            if (success) {
                result.code = 1000;
            } else {
                result.code = 1001;
            }
            return result;
        }
    
        public Result<T> success() {
            return success(true);
        }
    
        public Result<T> failure() {
            return success(false);
        }
    
        /**
         * @param code {@link ResultCode#getCode()}
         */
        public Result<T> code(int code) {
            this.code = code;
            return this;
        }
    
        public Result<T> message(String message) {
            this.message = message;
            return this;
        }
    
        public Result<T> data(T data) {
            this.data = data;
            return this;
        }
    }

## 简单写法（static） ##

import lombok.Data;
     
    @Data
    public class ResultWrapper<T> {
        private boolean success;
     
        private String message;
     
        private T data;
     
        public ResultWrapper() {
        }
     
        public ResultWrapper(boolean success) {
            this.success = success;
        }
     
        @SuppressWarnings({"rawtypes"})
        public static ResultWrapper success(boolean success) {
            return new ResultWrapper(success);
        }
     
        @SuppressWarnings({"rawtypes"})
        public static ResultWrapper success() {
            return success(true);
        }
     
        @SuppressWarnings({"rawtypes"})
        public static ResultWrapper failure() {
            return success(false);
        }
     
        @SuppressWarnings({"rawtypes"})
        public ResultWrapper message(String message) {
            this.message = message;
            return this;
        }
     
        @SuppressWarnings({"rawtypes"})
        public ResultWrapper data(T data) {
            this.data = data;
            return this;
        }
    }

## 支持子类（static） ##

import lombok.Data;
    
    @Data
    public class ResultWrapper<T> {
        private boolean success;
    
        private String message;
    
        private T data;
    
        public ResultWrapper() {
        }
    
        public ResultWrapper(boolean success) {
            this.success = success;
        }
    
        @SuppressWarnings({"rawtypes", "unchecked"})
        public static <R extends ResultWrapper> R success(boolean success) {
            return (R) new ResultWrapper(success);
        }
    
        @SuppressWarnings({"rawtypes"})
        public static <R extends ResultWrapper> R success() {
            return success(true);
        }
    
        @SuppressWarnings({"rawtypes"})
        public static <R extends ResultWrapper> R failure() {
            return success(false);
        }
    
        @SuppressWarnings({"rawtypes", "unchecked"})
        public <R extends ResultWrapper> R message(String message) {
            this.message = message;
            return (R) this;
        }
    
        @SuppressWarnings({"rawtypes", "unchecked"})
        public <R extends ResultWrapper> R data(T data) {
            this.data = data;
            return (R) this;
        }
    }

# 结果状态码 #

package com.example.demo.common.constant;
    
    public enum ResultCode {
        SUCCESS(1000, "访问成功"),
        SYSTEM_FAILURE(1001, "系统异常"),
        ;
    
        private final int code;
        private final String description;
    
        ResultCode(int code, String description) {
            this.code = code;
            this.description = description;
        }
    
        public int getCode() {
            return code;
        }
    
        public String getDescription() {
            return description;
        }
    }

[--_--_IT_-CSDN]: https://knife.blog.csdn.net/article/details/107996945