Java秒杀简单设计三：数据封装类

上一篇https://www.cnblogs.com/taiguyiba/p/9828984.html 整合了数据库表和Dao层代码

这一篇继续设计数据封装类：

涉及到获取秒杀地址，查询，返回秒杀结果等内容

1.数据封装：

1.1 秒杀地址封装类Exposer

建立Exposer类，用于封装秒杀地址：若是开启秒杀，则返回状态、秒杀地址md5加密值和ID，若是秒杀未开启，则返回开始时间、结束时间等。

Exposer.java

package com.seckill.dto; public class Exposer { //是否开启秒杀
    private boolean exposed; //md5加密
    private String md5; //id
    private long seckillId; //now time
    private long now; //start time
    private long start; //end time
    private long end; public Exposer(boolean exposed, String md5,long seckillId) { super(); this.exposed = exposed; this.md5 = md5; this.seckillId = seckillId; } public Exposer(boolean exposed, long now, long start, long end,long seckillId) { super(); this.exposed = exposed; this.now = now; this.start = start; this.end = end; this.seckillId = seckillId; } public Exposer(boolean exposed, long seckillId) { super(); this.exposed = exposed; this.seckillId = seckillId; } public boolean isExposed() { return exposed; } public void setExposed(boolean exposed) { this.exposed = exposed; } public String getMd5() { return md5; } public void setMd5(String md5) { this.md5 = md5; } public long getSeckillId() { return seckillId; } public void setSeckillId(long seckillId) { this.seckillId = seckillId; } public long getNow() { return now; } public void setNow(long now) { this.now = now; } public long getStart() { return start; } public void setStart(long start) { this.start = start; } public long getEnd() { return end; } public void setEnd(long end) { this.end = end; } @Override public String toString() { return "Exposer [exposed=" + exposed + ", md5=" + md5 + ", seckillId=" + seckillId + ", now=" + now + ", start="
                + start + ", end=" + end + "]"; } }

 1.2 秒杀结果封装类 SeckillExecution

   SeckillExecution主要用于封装秒杀结果

   

package com.seckill.dto; import com.seckill.entity.SuccessKilled; import com.seckill.enums.SeckillStateEnum; /** * 数据传递 * 其中并无添加枚举类型，转换成json有问题 * @author lll * */
public class SeckillExecution { private long seckillId; private int state; private String stateInfo; private SuccessKilled successKilled; public SeckillExecution(long seckillId,SeckillStateEnum seckillStateEnum, SuccessKilled successKilled) { super(); this.seckillId = seckillId; this.state = seckillStateEnum.getState(); this.stateInfo = seckillStateEnum.getStateInfo(); this.successKilled = successKilled; } public SeckillExecution(long seckillId, SeckillStateEnum seckillStateEnum) { super(); this.seckillId = seckillId; this.state = seckillStateEnum.getState(); this.stateInfo = seckillStateEnum.getStateInfo(); } public SeckillExecution(SeckillStateEnum seckillStateEnum) { super(); this.state = seckillStateEnum.getState(); this.stateInfo = seckillStateEnum.getStateInfo(); } public long getSeckillId() { return seckillId; } public void setSeckillId(long seckillId) { this.seckillId = seckillId; } public int getState() { return state; } public void setState(int state) { this.state = state; } public String getStateInfo() { return stateInfo; } public void setStateInfo(String stateInfo) { this.stateInfo = stateInfo; } public SuccessKilled getSuccessKilled() { return successKilled; } public void setSuccessKilled(SuccessKilled successKilled) { this.successKilled = successKilled; } @Override public String toString() { return "SeckillExecution [seckillId=" + seckillId + ", state=" + state + ", stateInfo=" + stateInfo + ", successKilled=" + successKilled + "]"; } }

 

1.3 前端请求结果封装类 SeckillResult

      SeckillResult<T> 用于封装前端请求的结果：

package com.seckill.dto; /** * 全部ajax请求封装 * @author mayn * */
public class SeckillResult<T> { private boolean success; private T data; private String error; public SeckillResult(boolean success, T data) { super(); this.success = success; this.data = data; } public SeckillResult(boolean success, String error) { super(); this.success = success; this.error = error; } public boolean isSuccess() { return success; } public void setSuccess(boolean success) { this.success = success; } public T getData() { return data; } public void setData(T data) { this.data = data; } public String getError() { return error; } public void setError(String error) { this.error = error; } }

 

1.4 常量数据字典 SeckillStateEnum

 SeckillStateEnum用于封装数据字典：

package com.seckill.enums; /** * 使用枚举标示常量数据字典 * @author mayn * */
public enum SeckillStateEnum { SUCCESSD(1,"秒杀成功"), END(0,"秒杀结束"), REPEAT_KILL(-1,"重复秒杀"), INNER_ERROR(-2,"内部错误"), DATA_REWRITE(-3,"数据篡改") ; private int state; private String stateInfo; private SeckillStateEnum(int state, String stateInfo) { this.state = state; this.stateInfo = stateInfo; } public int getState() { return state; } public String getStateInfo() { return stateInfo; } public static SeckillStateEnum stateOf(int index) { for(SeckillStateEnum state : values()) { if(state.getState() == index) { return state; } } return null; } }

 1.5 封装异常类

 RepeatKillException 重复秒杀异常类

package com.seckill.exception; public class RepeatKillException extends RuntimeException { public RepeatKillException(String message, Throwable cause) { super(message, cause); // TODO Auto-generated constructor stub
 } public RepeatKillException(String message) { super(message); // TODO Auto-generated constructor stub
 } }

 SeckillCloseException 秒杀关闭异常类

package com.seckill.exception; public class SeckillCloseException extends RuntimeException { public SeckillCloseException(String message, Throwable cause) { super(message, cause); // TODO Auto-generated constructor stub
 } public SeckillCloseException(String message) { super(message); // TODO Auto-generated constructor stub
 } }

 

SeckillException 秒杀异常类

package com.seckill.exception; public class SeckillException extends RuntimeException { public SeckillException(String message, Throwable cause) { super(message, cause); // TODO Auto-generated constructor stub
 } public SeckillException(String message) { super(message); // TODO Auto-generated constructor stub
 } }