用户模块

通用返回对象

• 新建包：common
• 新建类：ApiRestResponse

package com.izhaong.mall.common;

import com.izhaong.mall.exception.MallException;

public class ApiRestResponse<T> {

    private static final int OK_CODE = 1000;
    private static final String OK_MSG = "success";

    private Integer status;
    private String msg;
    private T data;

    public ApiRestResponse(Integer status, String msg, T data) {
        this.status = status;
        this.msg = msg;
        this.data = data;
    }

    public ApiRestResponse(Integer status, String msg) {
        this.status = status;
        this.msg = msg;
    }

    public ApiRestResponse() {
        this(OK_CODE, OK_MSG);
    }

    public static <T> ApiRestResponse<T> success() {
        return new ApiRestResponse<>();
    }

    public static <T> ApiRestResponse<T> success(T result) {
        ApiRestResponse<T> response = new ApiRestResponse<>();
        response.setData(result);
        return response;
    }

    public static <T> ApiRestResponse<T> error(Integer code, String msg) {
        return new ApiRestResponse<>(code, msg);
    }

    public static <T> ApiRestResponse<T> error(MallException ex) {
        return new ApiRestResponse<>(ex.getCode(), ex.getMsg());
    }

    public Integer getStatus() {
        return status;
    }

    public void setStatus(Integer status) {
        this.status = status;
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }
}

• 新建异常包：exception

• 新建异常类：MallException

  package com.izhaong.mall.exception;
  
  public class MallException {
  
      private final Integer code;
      private final String msg;
  
      public MallException(Integer code, String msg) {
          this.code = code;
          this.msg = msg;
      }
  
      public MallException(MallExceptionEnum exceptionEnum) {
          this(exceptionEnum.getCode(), exceptionEnum.getMsg());
      }
  
      public Integer getCode() {
          return code;
      }
  
      public String getMsg() {
          return msg;
      }
  }

• 新建异常枚举：MallExceptionEnum

  package com.izhaong.mall.exception;
  
  public enum MallExceptionEnum {
      NEED_USER_NAME(10001, "用户名不能为空");
  
      Integer code;
      String msg;
  
      MallExceptionEnum(Integer code, String msg) {
          this.code = code;
          this.msg = msg;
      }
  
      public Integer getCode() {
          return code;
      }
  
      public void setCode(Integer code) {
          this.code = code;
      }
  
      public String getMsg() {
          return msg;
      }
  
      public void setMsg(String msg) {
          this.msg = msg;
      }
  }

密码加密

使用MD5加密

• 新建软件包：util

• 新建工具类：MD5Utils

  static修饰 方便其他人调用

  package com.izhaong.mall.util;
  
  import com.izhaong.mall.common.Constant;
  import org.apache.tomcat.util.codec.binary.Base64;
  import java.security.MessageDigest;
  import java.security.NoSuchAlgorithmException;
  
  /**
   * @author izhaong
   */
  public class MD5Utils {
      public static String getMD5Str(String strVal) throws NoSuchAlgorithmException {
          MessageDigest md5 = MessageDigest.getInstance("MD5");
          return Base64.encodeBase64String(md5.digest((strVal + Constant.SAIT).getBytes()));
      }
  }

• 防止暴力破解，对其加盐

  • 定义常量：新建类：common/Constant

    package com.izhaong.mall.common;
    
    public class Constant {
        public static final String SAIT = "dfa@fs1231";
    }

• 使用

  service/UserServiceimpl.java

          try {
              user.setPassword(MD5Utils.getMD5Str(password));
          } catch (NoSuchAlgorithmException e) {
              e.printStackTrace();
          }