idea建立ssm專案、增刪改查操作，以及注意事項！
阿新 • • 發佈：2019-02-01
專案技術工具：
- jsp + springmvc + spring + mybatis +mysql5.7
- maven 3.3.9
- tomcat 8.5 + jdk 1.8
idea建立專案：
或者
或者
next然後finish即可，生成的專案目錄：
需要新增成的目錄：
當生成java目錄和resource目錄時需要處理一下：
原始：
處理：
處理之後：
處理的原因：
idea不會自動識別資源，需要手動設定！eclipse專案匯入idea時需要常常注意這個問題！
- web.xml
<?xml version="1.0" encoding="UTF-8"?> - applicationContext.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- 配置DataSource資料來源 -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/twjitm"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</bean>
<!--配置工廠， 建立SqlSessionFactory，同時指定資料來源 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!-- 自動掃描mapping.xml檔案 -->
<property name="mapperLocations" value="classpath*:com.ssm/dao/EmpMapper.xml"></property>
</bean>
<!-- 配置MapperScannerConfigurer -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- DAO介面所在地包，spring會自動查詢 -->
<property name="basePackage" value="com.ssm.dao"></property>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>
<!-- 開啟註解掃描
某個類的頭上有特定的註解
@Component，@Repository，@Service，@Controller，就會將這個物件作為Bean註冊進Spring容器。
-->
<context:component-scan base-package="com.ssm"/>
<!-- 開啟RequestMapping 註解 -->
<mvc:annotation-driven/>
<!-- 處理請求轉發 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/emp/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>- log4j.properties
log4j.rootLogger=CONSOLE,FILE
#log4j.rootLogger=DEBUG,CONSOLE,FILE
log4j.addivity.org.apache=true
# 應用於控制檯
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Threshold=INFO
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.Encoding=GBK
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n
# 每天新建日誌
log4j.appender.A1=org.apache.log4j.DailyRollingFileAppender
log4j.appender.A1.File=E:/log4j/log
log4j.appender.A1.Encoding=GBK
log4j.appender.A1.Threshold=DEBUG
log4j.appender.A1.DatePattern='.'yyyy-MM-dd
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L : %m%n
#應用於檔案
log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=E:/log4j/file.log
log4j.appender.FILE.Append=false
log4j.appender.FILE.Encoding=GBK
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n
# 應用於檔案回滾
log4j.appender.ROLLING_FILE=org.apache.log4j.RollingFileAppender
log4j.appender.ROLLING_FILE.Threshold=ERROR
log4j.appender.ROLLING_FILE.File=rolling.log
log4j.appender.ROLLING_FILE.Append=true
log4j.appender.CONSOLE_FILE.Encoding=GBK
log4j.appender.ROLLING_FILE.MaxFileSize=10KB
log4j.appender.ROLLING_FILE.MaxBackupIndex=1
log4j.appender.ROLLING_FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.ROLLING_FILE.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n
#自定義Appender
#log4j.appender.im = net.cybercorlin.util.logger.appender.IMAppender
#log4j.appender.im.host = mail.cybercorlin.net
#log4j.appender.im.username = username
#log4j.appender.im.password = password
#log4j.appender.im.recipient = [email protected]
#log4j.appender.im.layout=org.apache.log4j.PatternLayout
#log4j.appender.im.layout.ConversionPattern =[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n
#應用於socket
log4j.appender.SOCKET=org.apache.log4j.RollingFileAppender
log4j.appender.SOCKET.RemoteHost=localhost
log4j.appender.SOCKET.Port=5001
log4j.appender.SOCKET.LocationInfo=true
# Set up for Log Facter 5
log4j.appender.SOCKET.layout=org.apache.log4j.PatternLayout
log4j.appender.SOCET.layout.ConversionPattern=[start]%d{DATE}[DATE]%n%p[PRIORITY]%n%x[NDC]%n%t[THREAD]%n%c[CATEGORY]%n%m[MESSAGE]%n%n
# Log Factor 5 Appender
log4j.appender.LF5_APPENDER=org.apache.log4j.lf5.LF5Appender
log4j.appender.LF5_APPENDER.MaxNumberOfRecords=2000
# 傳送日誌給郵件
#log4j.appender.MAIL=org.apache.log4j.net.SMTPAppender
#log4j.appender.MAIL.Threshold=FATAL
#log4j.appender.MAIL.BufferSize=10
#[email protected]
#log4j.appender.MAIL.SMTPHost=www.wusetu.com
#log4j.appender.MAIL.Subject=Log4J Message
#[email protected]
#log4j.appender.MAIL.layout=org.apache.log4j.PatternLayout
#log4j.appender.MAIL.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n- entity
— Condition.java
package com.ssm.entity;
import java.util.List;
public class Condition {
private Integer deptno;
private Double salary;
private List<Integer> empnos;
public Integer getDeptno() {
return deptno;
}
public void setDeptno(Integer deptno) {
this.deptno = deptno;
}
public Double getSalary() {
return salary;
}
public void setSalary(Double salary) {
this.salary = salary;
}
public List<Integer> getEmpnos() {
return empnos;
}
public void setEmpnos(List<Integer> empnos) {
this.empnos = empnos;
}
}
— Emp.java
package com.ssm.entity;
import java.util.Date;
public class Emp {
private Integer empno;
private String ename;
private String job;
private Integer mgr;
private Date hiredate;
private Double sal;
private Double comm;
private Integer deptno;
public Integer getEmpno() {
return empno;
}
public void setEmpno(Integer 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;
}
public Integer getMgr() {
return mgr;
}
public void setMgr(Integer mgr) {
this.mgr = mgr;
}
public Date getHiredate() {
return hiredate;
}
public void setHiredate(Date hiredate) {
this.hiredate = hiredate;
}
public Double getSal() {
return sal;
}
public void setSal(Double sal) {
this.sal = sal;
}
public Double getComm() {
return comm;
}
public void setComm(Double comm) {
this.comm = comm;
}
public Integer getDeptno() {
return deptno;
}
public void setDeptno(Integer deptno) {
this.deptno = deptno;
}
}
- dao層
— EmpDao介面
package com.ssm.dao;
import com.ssm.entity.Emp;
import java.util.List;
public interface EmpDao {
public List<Emp> findAll(); // 查詢全部
public void save(Emp emp); // 新增
public Emp findById(int id); // 按id查詢
public void update(Emp emp); // 更新
public void delete(int id); // 刪除
}
---EmpMapper.xml
<?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="com.ssm.dao.EmpDao">
<select id="findAll" resultType="com.ssm.entity.Emp">
select * from t_emp order by empno
</select>
<insert id="save" parameterType="com.ssm.entity.Emp" useGeneratedKeys="true" keyProperty="empno">
insert into t_emp values(
#{ename,jdbcType=VARCHAR},
#{job,jdbcType=VARCHAR},
#{mgr,jdbcType=NUMERIC},
#{hiredate,jdbcType=DATE},
#{sal,jdbcType=NUMERIC},
#{comm,jdbcType=NUMERIC},
#{deptno,jdbcType=NUMERIC},
#{empno,jdbcType=INTEGER}
)
</insert>
<select id="findById" parameterType="java.lang.Integer" resultType="com.ssm.entity.Emp">
select * from t_emp where empno=#{id}
</select>
<update id="update" parameterType="com.ssm.entity.Emp">
update t_emp set
ename = #{ename,jdbcType=VARCHAR},
job = #{job,jdbcType=VARCHAR},
sal = #{sal,jdbcType=NUMERIC}
where empno=#{empno,jdbcType=NUMERIC}
</update>
<delete id="delete" parameterType="java.lang.Integer">
delete from t_emp where empno=#{id}
</delete>
</mapper>- Controller層
—EmpController.java
package com.ssm.controller;
import com.ssm.dao.EmpDao;
import com.ssm.entity.Emp;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import javax.annotation.Resource;
import java.util.List;
@Controller
public class EmpController {
@Resource
private EmpDao empDao;
public void setEmpDao(EmpDao empDao) {
this.empDao = empDao;
}
@RequestMapping("/find.do")
public String find(Model model) {
List<Emp> list = empDao.findAll();
model.addAttribute("emps", list);
return "emp_list";
}
/*
* 開啟新頁面
*/
@RequestMapping("/toAddEmp.do")
public String toAdd(){
return "emp_add";
}
/*
* 新增儲存
*/
@RequestMapping("/addEmp.do")
public String add(Emp emp){
empDao.save(emp);
return "redirect:find.do";
}
/*
* 開啟修改頁面
*/
@RequestMapping("/toUpdateEmp.do")
public String toUpdate(@RequestParam("id") int id, Model model){
Emp emp =empDao.findById(id);
model.addAttribute("emp",emp);
return "emp_update";
}
/*
* 修改儲存
*/
@RequestMapping("/updateEmp.do")
public String update(Emp emp){
empDao.update(emp);
return "redirect:find.do";
}
/*
* 刪除
*/
@RequestMapping("/deleteEmp.do")
public String delete(@RequestParam("id") int id){
empDao.delete(id);
return "redirect:find.do";
}
}
- jsp前端頁面
—emp_add.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>add_emp.jsp</title>
</head>
<body>
<form action="addEmp.do" method="post">
<table width="40%" border="1" cellpadding="2" cellspacing="0" align="center" >
<tr>
<td>姓名</td>
<td><input type="text" name="ename" /></td>
</tr>
<tr>
<td>崗位</td>
<td><input type="text" name="job" /></td>
</tr>
<tr>
<td>工資</td>
<td><input type="text" name="sal" /></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="儲存" /></td>
</tr>
</table>
</form>
</body>
</html>—emp_list.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>emp_list.jsp</title>
<script type="text/javascript">
function delete_emp(id){
var str = window.confirm("are you sure ?");
if(str){
location.href="deleteEmp.do?id="+id;
}
}
</script>
</head>
<body>
<div align="center">
<input type="button" value="新增" onclick="location.href='toAddEmp.do'" >
</div>
<table width="80%" border="1" cellpadding="2" cellspacing="0" align="center">
<tr>
<th>EMPNO</th>
<th>ENAME</th>
<th>JOB</th>
<th>MGR</th>
<th>HIREDATE</th>
<th>SAL</th>
<th>COMM</th>
<th>DEPTNO</th>
<th>操作</th>
</tr>
<c:forEach items="${emps}" var="emp">
<tr>
<td>${emp.empno}</td>
<td>${emp.ename}</td>
<td>${emp.job}</td>
<td>${emp.mgr}</td>
<td>${emp.hiredate}</td>
<td>${emp.sal}</td>
<td>${emp.comm}</td>
<td>${emp.deptno}</td>
<td>
<input type="button" value="修改" onclick="location.href='toUpdateEmp.do?id=${emp.empno}'" />
<input type="button" value="刪除" onclick="delete_emp(${emp.empno});" />
</td>
</tr>
</c:forEach>
</table>
</body>
</html>—emp_update.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="updateEmp.do" method="post">
<table width="40%" align="center" border="1" cellpadding="2" cellspacing="0" >
<tr>
<td>EMPNO:</td>
<td><input type="text" name="empno" value="${emp.empno }" disabled> </td>
</tr>
<tr>
<td>姓名:</td>
<td><input type="text" name="ename" value="${emp.ename }" > </td>
</tr>
<tr>
<td>崗位:</td>
<td><input type="text" name="job" value="${emp.job }" > </td>
</tr>
<tr>
<td>工資:</td>
<td><input type="text" name="sal" value="${emp.sal }" > </td>
</tr>
<tr>
<td> <input type="submit" value="儲存" > </td>
</tr>
</table>
</form>
</body>
</html>資料庫表：
DROP TABLE IF EXISTS `t_emp`;
CREATE TABLE `t_emp` (
`ename` varchar(255) DEFAULT NULL,
`job` varchar(255) DEFAULT NULL,
`mgr` decimal(10,0) DEFAULT NULL,
`hiredate` date DEFAULT NULL,
`sal` decimal(10,0) DEFAULT NULL,
`comm` decimal(10,0) DEFAULT NULL,
`deptno` decimal(10,0) DEFAULT NULL,
`empno` int(11) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (`empno`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Records of t_emp
-- ----------------------------
INSERT INTO `t_emp` VALUES ('aaa', 'a', '12', '2018-08-23', '12', '1', '12', '1');
INSERT INTO `t_emp` VALUES ('i', 'a', '12', '2018-08-23', '12', '1', '12', '2');
INSERT INTO `t_emp` VALUES ('b', 'a', '12', '2018-08-23', '12', '1', '12', '3');
INSERT INTO `t_emp` VALUES ('c', 'a', '12', '2018-08-23', '12', '1', '12', '4');
INSERT INTO `t_emp` VALUES ('d', 'a', '12', '2018-08-23', '12', '1', '12', '5');
INSERT INTO `t_emp` VALUES ('e', 'a', '12', '2018-08-23', '12', '1', '12', '6');
INSERT INTO `t_emp` VALUES ('f', 'a', '12', '2018-08-23', '12', '1', '12', '7');
INSERT INTO `t_emp` VALUES ('g', 'a', '12'