服务端API返回状态码封装

小咪咪 2021-09-21 10:36 351阅读 0赞

### 文章目录 ###

*   *   *  状态码封装枚举类
         *  返回结果封装类
         *  使用示例

### 状态码封装枚举类 ###

使用枚举的好处是把状态码和状态信息结合到了一起，当然不使用枚举类用静态成员变量也行，状态码信息需要单独封装。

/** * 方法执行状态工具类 * @author lqc */
    public enum ResultCode { 
        SUCCESS(200, "操作成功"),
        FAILED(500, "操作失败"),
        FORBIDDEN(403, "没有权限执行"),
        PARAMETER_ERROR(404, "传递参数有误~"),
        UNAUTHORIZED(403, "暂未登录或token已经过期");
    
        private int code;
        private String msg;
    
        ResultCode(int code, String msg) { 
            this.code = code;
            this.msg = msg;
        }
    
        public int getCode() { 
            return code;
        }
    
        public String getMsg() { 
            return msg;
        }
    }

### 返回结果封装类 ###

import java.io.Serializable;
    import java.util.HashMap;
    
    /** * @author lqc */
    public class CommonResult implements Serializable { 
    
        /** * 状态码 */
        private int code = 0;
    
        /** * 提示信息 */
        private String msg;
        /** * json数据域 */
        private Object data = null;
    
        public CommonResult() { 
    
        }
    
        public CommonResult(int code,String msg,Object data) { 
            this.code = code;
            this.msg = msg;
            this.data = data;
        }
    
        public static CommonResult newInstance(int code,String msg,Object data){ 
            return new CommonResult(code,msg,data);
        }
    
        public static CommonResult newInstance(int code,String msg){ 
            return new CommonResult(code,msg,null);
        }
    
        /** * 在map中存放多个数据 * @param key * @param data */
        public CommonResult putData(String key, Object data) { 
            if (this.data == null || !(data instanceof HashMap)) { 
                this.data = new HashMap<String, Object>();
            }
            ((HashMap<String, Object>) this.data).put(key, data);
            return this;
        }
    
        /** * 在map中清除数据 * @param key */
        public CommonResult removeData(String key){ 
            if(data != null && data instanceof HashMap){ 
                ((HashMap<String,Object>)data).remove(key);
            }
            return this;
        }
    
        /** * 设置错误的状态码 * @param CODE */
        public CommonResult setCode(ResultCode CODE) { 
            this.code = CODE.getCode();
            this.msg = CODE.getMsg();
            return this;
        }
    
        /** * 设置状态码和数据 * @param CODE * @param data */
        public CommonResult setCode(ResultCode CODE, Object data) { 
            this.code = CODE.getCode();
            this.msg = CODE.getMsg();
            this.data = data;
            return this;
        }
    
    
        public CommonResult setException(Exception e){ 
            if(e != null) { 
                this.setCode(ResultCode.FAILED.getCode());
                this.setMsg(e.getMessage());
            }
            return this;
        }
    
        public static CommonResult success(){ 
            return new CommonResult(ResultCode.SUCCESS.getCode(),ResultCode.SUCCESS.getMsg(),null);
        }
    
        public static CommonResult success(Object data){ 
            return new CommonResult(ResultCode.SUCCESS.getCode(),ResultCode.SUCCESS.getMsg(),data);
        }
    
    
        public static CommonResult success(Object data,String msg){ 
            return new CommonResult(ResultCode.SUCCESS.getCode(),msg,data);
        }
    
    
        public static CommonResult failed(){ 
            return new CommonResult(ResultCode.FAILED.getCode(),ResultCode.FAILED.getMsg(),null);
        }
    
        public static CommonResult failed(String msg){ 
            return new CommonResult(ResultCode.FAILED.getCode(),msg,null);
        }
    
        public static CommonResult failed(int code,String msg){ 
            return new CommonResult(code,msg,null);
        }
    
        public static CommonResult parameterError(){ 
            return new CommonResult(ResultCode.PARAMETER_ERROR.getCode(),ResultCode.PARAMETER_ERROR.getMsg(),null);
        }
    
        public static CommonResult forbidden(){ 
            return new CommonResult(ResultCode.FORBIDDEN.getCode(),ResultCode.FORBIDDEN.getMsg(),null);
        }
    
    
        public int getCode() { 
            return code;
        }
    
        public CommonResult setCode(int code) { 
            this.code = code;
            return this;
        }
    
        public String getMsg() { 
            return msg;
        }
    
        public CommonResult setMsg(String msg) { 
            this.msg = msg;
            return this;
        }
    
        public Object getData() { 
            return data;
        }
    
        public CommonResult setData(Object data) { 
            this.data = data;
            return this;
        }
    }

### 使用示例 ###

//设置状态码并存入数据，可以连续put多个数据
    return CommonResult.newInstance(200, "ok").putData("user", user);
    return CommonResult.newInstance(200, "ok").putData("user", user).putData("deptList",deptList);
    // 直接返回成功
    return CommonResult.success("ok");
    // 直接返回操作失败
    return CommonResult.failed();

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