开发工具Eclipse的使用之导入项目（import）

🥳🥳**Welcome Huihui's Code World ! !**🥳🥳

接下来看看由辉辉所写的关于Eclipse使用的相关操作吧

一.导读

上篇我们已经详细介绍了开发工具eclipse，也说明了eclipse的基本使用，那么我们这篇来详细讲述一下怎么导入项目

二.详细操作步骤

1.右击项目处，点击import

2.选择所要导入的项目所在路径

3.导入项目完毕之后，需要检查是否有错误

4.若报错，则检查配置的文件是否出现了问题

5.将报错的文件移除掉

6.重新配置一个文件（注意版本）

7.项目不报错之后，我们来看一下数据库辅助类

8.核对账号密码的信息

9.再选择需要导入的对应数据库脚本

10.选择运行的jsp界面即可，若成功运行，则没有问题

11.我们再参照这个项目中的代码，完成一个简单的增删改查

entity

package com.wh.entity;

public class Cat {
int cid;
String cname;
int age;

public Cat() {
    // TODO Auto-generated constructor stub
}

public Cat(int cid, String cname, int age) {
    super();
    this.cid = cid;
    this.cname = cname;
    this.age = age;
}

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 int getAge() {
    return age;
}

public void setAge(int age) {
    this.age = age;
}

@Override
public String toString() {
    return "Cat [cid=" + cid + ", cname=" + cname + ", age=" + age + "]";
}


}

dao

package com.wh.dao;

import java.util.List;

import com.zking.util.BaseDao;
import com.zking.util.PageBean;
import com.zking.util.StringUtils;

public class CatDao extends BaseDao<Cat>{
    public List<Cat> list(Cat cat,PageBean pageBean) throws Exception{
        String sql = "select * from t_mvc_cat where 1 =1 ";
        String title = cat.getCname();
        int id = cat.getCid();
        if(StringUtils.isNotBlank(title)) {
            sql += " and title like '%"+title+"%'";
        }
        if(id != 0) {
            sql += " and cid = "+id;
        }
        return super.executeQuery(sql, Cat.class, pageBean);
    }
    
    public void add(Cat cat) throws Exception {
        String sql = "insert into t_mvc_cat(cid,cname,age) values(?,?,?)";
        super.executeUpdate(sql, cat, new String[] {"cid","cname","age"});
    }
    
    public void delete(Cat cat) throws Exception {
        String sql = "delete from t_mvc_cat where cid = ?";
        super.executeUpdate(sql, cat, new String[] {"cid"});
    }
    
    public void edit(Cat cat) throws Exception {
        String sql = "update t_mvc_cat set cname = ?,age = ? where cid = ?";
        super.executeUpdate(sql, cat, new String[] {"cname","age","cid"});
    }
}

servlet

package com.wh.web;

import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import com.wh.dao.CatDao;
import com.zking.entity.Cat;
import com.zking.framework.ActionSupport;
import com.zking.framework.ModelDriver;
import com.zking.util.PageBean;

public class CatAction extends ActionSupport implements ModelDriver<Cat>{
    public Cat cat = new Cat();
    public CatDao catDao = new CatDao();
    @Override
    public Cat getModel() {
        return cat;
    }
    
    public String list(HttpServletRequest req, HttpServletResponse resp) {
//        查数据库的
        PageBean pageBean = new PageBean();
        pageBean.setRequest(req);
        try {
             List<Cat> list = catDao.list(cat, pageBean);
            req.setAttribute("cats", list);
            req.setAttribute("pageBean", pageBean);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "list";
    }
    
    public String add(HttpServletRequest req, HttpServletResponse resp) {
        try {
            catDao.add(cat);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "toList";
    }
    public String delete(HttpServletRequest req, HttpServletResponse resp) {
        try {
            catDao.delete(cat);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "toList";
    }
    public String edit(HttpServletRequest req, HttpServletResponse resp) {
        try {
            catDao.edit(cat);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "toList";
    }
    
    public String toEdit(HttpServletRequest req, HttpServletResponse resp) {
        if(cat.getCid()!= 0) {
            try {
                List<Cat> list = catDao.list(cat, null);
                req.setAttribute("c", list.get(0));
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return "toEdit";
    }
}

运行结果

** 好啦，今天的分享就到这了，希望能够帮到你呢！😊😊 **