eclipse工具 maven 整合ssm（四）：写逻辑代码

野性酷女 2022-05-31 04:46 143阅读 0赞

## eclipse工具 maven 整合ssm（四）：写逻辑代码 ##

##### 1.实体类 #####

package h5.model;
    
    public class Emp {
    
    	private int empno;
    	private String ename;
    	private String job;
    	
    	public int getEmpno() {
    		return empno;
    	}
    	public void setEmpno(int empno) {
    		this.empno = empno;
    	}
    	public String getEname() {
    		return ename;
    	}
    	public void setEname(String ename) {
    		this.ename = ename;
    	}
    	public String getJob() {
    		return job;
    	}
    	public void setJob(String job) {
    		this.job = job;
    	}
    	
    	@Override
    	public String toString() {
    		return "Emp [empno=" + empno + ", ename=" + ename + ", job=" + job + "]";
    	}
    }

##### 2. controller层 #####

package h5.controller;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.beans.factory.annotation.Qualifier;
    import org.springframework.stereotype.Controller;
    import org.springframework.ui.Model;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    import h5.model.Emp;
    import h5.service.IEmpService;
    
    @Controller
    public class EmpController {
    
    	@Autowired
    	@Qualifier("empService")
    	private IEmpService empService;
    	
    	@RequestMapping("/getEmpByEmpno")
    	public String getEmpByEmpno(Model model,Integer empno)
    	{
    		//调用service
    		Emp emp = empService.getEmpByEmpno(empno);
    		
    		//保存数据
    		model.addAttribute("emp", emp);
    		
    		return "/index.jsp";
    	}
    	
    }

##### 3.service层:建service接口和实现类 #####

package h5.service;
    
    import h5.model.Emp;
    
    public interface IEmpService {
    
    	public Emp getEmpByEmpno(int empno);
    	
    }

package com.h5.service.impl;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.beans.factory.annotation.Qualifier;
    import org.springframework.stereotype.Service;
    
    import h5.EmpMapper;
    import h5.model.Emp;
    import h5.service.IEmpService;
    
    @Service("empService")
    public class EmpServiceImpl implements IEmpService {
    
    	@Autowired
    	@Qualifier("empMapper")
    	private EmpMapper empMapper;
    	
    	@Override
    	public Emp getEmpByEmpno(int empno) {
    		
    		Emp emp = empMapper.getEmpByEmpno(empno);
    		
    		return emp;
    	}
    
    }

##### 4.dao层 #####

package h5.dao;
    
    import h5.model.Emp;
    
    public interface EmpMapper {
    	public Emp getEmpByEmpno(int empno);
    }

##### 5.mapper #####

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
     <mapper namespace="h5.dao.EmpMapper">
    
        <select id="getEmpByEmpno" parameterType="int" resultType="h5.model.Emp">
            select * from emp where empno = #{empno}
        </select>
    
    </mapper>

##### 6.jsp页面，jsp页面放在webapp下，如下图 #####

![SouthEast][]

<%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Insert title here</title>
    </head>
    <body>
    	<form action="getEmpByEmpno.action">
    		雇员编号：<input type="text" name="empno">
    		<input type="submit" value="查询">
    	</form> 
    	
    	${emp}
    </body>
    </html>

逻辑代码就写完了

[SouthEast]: /images/20220531/8fcff6015cfd443f9c6acb77e61cab9c.png