idea工具普通克隆及验证

下面进行克隆，克隆是克隆对象，根据方法选择克隆的对象

@Override
public Apply huixian(String aid) {
    Connection conn = BaseDao.getConn();
    Apply ap=null;
    try {
        PreparedStatement ps = conn.prepareStatement("select apply.*,cname from apply,category where apply.cid=category.cid AND aid="+aid);
        System.out.println(ps.toString());
        ResultSet rs = ps.executeQuery();
        if (rs.next()){
            ap=new Apply(rs.getInt(1), rs.getString(2), rs.getString(3), rs.getString(4), rs.getDouble(5), rs.getString(6), rs.getInt(7), rs.getString(8), rs.getInt(9), rs.getString(10));
        }
    } catch (SQLException e) {
        throw new RuntimeException(e);
    }
    return ap;
}

 以上是回显方法，我用到了Apply对象，所以我需要在Apply对象中实现克隆方法，下面是我的Apply中的内容

package com.bw.entity;

import java.io.Serializable;

/**
 * 列表变量
 */
public class Apply implements Cloneable, Serializable {
    private   int   aid;
    private   String  name;
    private   String  idcrad;
    private   String  tel;
    private    double   amount;
    private    String   aoolydate;
    private   int     status;
    private   String    detail;
    private    int   cid;
    private   String  cname;

    public int getAid() {
        return aid;
    }

    public void setAid(int aid) {
        this.aid = aid;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getIdcrad() {
        return idcrad;
    }

    public void setIdcrad(String idcrad) {
        this.idcrad = idcrad;
    }

    public String getTel() {
        return tel;
    }

    public void setTel(String tel) {
        this.tel = tel;
    }

    public double getAmount() {
        return amount;
    }

    public void setAmount(double amount) {
        this.amount = amount;
    }

    public String getAoolydate() {
        return aoolydate;
    }

    public void setAoolydate(String aoolydate) {
        this.aoolydate = aoolydate;
    }

    public int getStatus() {
        return status;
    }

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

    public String getDetail() {
        return detail;
    }

    public void setDetail(String detail) {
        this.detail = detail;
    }

    public int getCid() {
        return cid;
    }

    public void setCid(int cid) {
        this.cid = cid;
    }

    public String getCname() {
        return cname;
    }

    public void setCname(String cname) {
        this.cname = cname;
    }

    public Apply(int aid, String name, String idcrad, String tel, double amount, String aoolydate, int status, String detail, int cid, String cname) {
        this.aid = aid;
        this.name = name;
        this.idcrad = idcrad;
        this.tel = tel;
        this.amount = amount;
        this.aoolydate = aoolydate;
        this.status = status;
        this.detail = detail;
        this.cid = cid;
        this.cname = cname;
    }

    @Override
    public Object clone() throws CloneNotSupportedException {
        Apply apply=null;
        apply=(Apply) super.clone();
        return apply;
    }
}

 鼠标放到Cloneable上，按alt加insert，选重写方法，选中克隆方法，下面的方法要用public，让test（测试类）调用，内容是我改过的，可以不动。

下面是我的测试类内容：

package com.bw.test;

import com.bw.dao.ApplyDaoImpl;
import com.bw.entity.Apply;

public class Test {
    public static void main(String[] args) throws CloneNotSupportedException {
        ApplyDaoImpl app=new ApplyDaoImpl();
        Apply apply_one = app.huixian("15");
        Apply apply_two = (Apply) apply_one.clone();
        System.out.println(apply_one==apply_two);
        System.out.println(apply_one.getAid()==apply_one.getAid());
    }
}

 调用实现类的回显方法，然后对回显出来的对象进行克隆，然后比较，第一个比较的是对象，对象是不一样的，就像两辆一样的汽车，不可能是同一个，但对象里的数据是一致的。

下面是我的控制台效果

原文地址：https://blog.csdn.net/2302_77782958/article/details/136150882

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