springMVC实现增删改查
springMVC实现增删改查
首先需要准备好一张数据库表我这里用emp这张表：具体代码：
1 /* 2 SQLyog 企业版 - MySQL GUI v8.14 3 MySQL - 5.1.73-community 4 ********************************************************************* 5 */ 6 /*!40101 SET NAMES utf8 */; 7 8 create table `emp` ( 9 `empno` double , 10 `ename` varchar (60), 11 `job` varchar (60), 12 `mgr` double , 13 `hiredate` varchar (60), 14 `sal` float , 15 `comm` float , 16 `deptno` double 17 ); 18 insert into `emp` (`empno`, `ename`, `job`, `mgr`, `hiredate`, `sal`, `comm`, `deptno`) values('7369','SMITH','CLERK','7902','2018-10-28 10:22:37','800','0.565','10'); 19 insert into `emp` (`empno`, `ename`, `job`, `mgr`, `hiredate`, `sal`, `comm`, `deptno`) values('7499','Allen','SALESMAN','7698','2018-10-28 10:22:37','1600','300','30'); 20 insert into `emp` (`empno`, `ename`, `job`, `mgr`, `hiredate`, `sal`, `comm`, `deptno`) values('7521','Ward','SALESMAN','7698','2018-10-28 10:22:37','1250','500','30'); 21 insert into `emp` (`empno`, `ename`, `job`, `mgr`, `hiredate`, `sal`, `comm`, `deptno`) values('7566','JONES','MANAGER','7839','2018-10-28 10:22:37','2975','0','20'); 22 insert into `emp` (`empno`, `ename`, `job`, `mgr`, `hiredate`, `sal`, `comm`, `deptno`) values('7654','MARTIN','SALESMAN','7698','2018-10-28 10:22:37','1250','1400','30'); 23 insert into `emp` (`empno`, `ename`, `job`, `mgr`, `hiredate`, `sal`, `comm`, `deptno`) values('7782','CLARK','MANAGER','7839','2018-10-28 10:22:37','2450',NULL,'10'); 24 insert into `emp` (`empno`, `ename`, `job`, `mgr`, `hiredate`, `sal`, `comm`, `deptno`) values('7788','SCOTT','ANALYST','7566','2018-10-28 10:22:38','3000',NULL,'20'); 25 insert into `emp` (`empno`, `ename`, `job`, `mgr`, `hiredate`, `sal`, `comm`, `deptno`) values('7839','KING','PRESIDENT',NULL,'2018-10-28 10:22:38','5000',NULL,'10'); 26 insert into `emp` (`empno`, `ename`, `job`, `mgr`, `hiredate`, `sal`, `comm`, `deptno`) values('7844','TURNER','SALESMAN','7698','2018-10-28 10:22:38','1500','0','30'); 27 insert into `emp` (`empno`, `ename`, `job`, `mgr`, `hiredate`, `sal`, `comm`, `deptno`) values('7876','ADAMS','CLERK','7788','2018-10-28 10:22:38','1100',NULL,'20'); 28 insert into `emp` (`empno`, `ename`, `job`, `mgr`, `hiredate`, `sal`, `comm`, `deptno`) values('7902','FORD','ANALYST','7566','2018-10-28 10:22:38','3000',NULL,'20');
然后开始我们的增删改查工作：
第一步：建立一个Maven项目，我们这里命名为”lianxicrud”，然后配置pom.xml：需要的jar包有：jstl，javax.servlet-api，spring-web，spring-webmvc，
spring-jdbc，mysql
1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 <groupId>web01</groupId> 5 <artifactId>lianxicrud</artifactId> 6 <packaging>war</packaging> 7 <version>0.0.1-SNAPSHOT</version> 8 <name>lianxicrud Maven Webapp</name> 9 <url>http://maven.apache.org</url> 10 <dependencies> 11 <dependency> 12 <groupId>junit</groupId> 13 <artifactId>junit</artifactId> 14 <version>3.8.1</version> 15 <scope>test</scope> 16 </dependency> 17 <!-- https://mvnrepository.com/artifact/javax.servlet/jstl --> 18 <dependency> 19 <groupId>javax.servlet</groupId> 20 <artifactId>jstl</artifactId> 21 <version>1.2</version> 22 </dependency> 23 <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> 24 <dependency> 25 <groupId>javax.servlet</groupId> 26 <artifactId>javax.servlet-api</artifactId> 27 <version>4.0.1</version> 28 <scope>provided</scope> 29 </dependency> 30 <!-- https://mvnrepository.com/artifact/org.springframework/spring-web --> 31 <dependency> 32 <groupId>org.springframework</groupId> 33 <artifactId>spring-web</artifactId> 34 <version>5.0.8.RELEASE</version> 35 </dependency> 36 <!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc --> 37 <dependency> 38 <groupId>org.springframework</groupId> 39 <artifactId>spring-webmvc</artifactId> 40 <version>5.0.8.RELEASE</version> 41 </dependency> 42 <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc --> 43 <dependency> 44 <groupId>org.springframework</groupId> 45 <artifactId>spring-jdbc</artifactId> 46 <version>5.0.8.RELEASE</version> 47 </dependency> 48 <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java --> 49 <dependency> 50 <groupId>mysql</groupId> 51 <artifactId>mysql-connector-java</artifactId> 52 <version>5.1.47</version> 53 </dependency> 54 </dependencies> 55 <build> 56 <finalName>lianxicrud</finalName> 57 </build> 58 </project>
第二步：在WEB-INF下：建立springMVC-servlet.xml文件。配置springMVC-servlet.xml和WEB-INF下的web.xml
1.springMVC-servlet.xml：主要配置数据源，视图解析器，以及注册拦截器……
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" 4 xmlns:mvc="http://www.springframework.org/schema/mvc" 5 xsi:schemaLocation="http://www.springframework.org/schema/beans 6 http://www.springframework.org/schema/beans/spring-beans.xsd 7 http://www.springframework.org/schema/context 8 http://www.springframework.org/schema/context/spring-context.xsd 9 http://www.springframework.org/schema/mvc 10 http://www.springframework.org/schema/mvc/spring-mvc.xsd"> 11 <context:component-scan base-package="controller" /> 12 <context:component-scan base-package="dao" /> 13 <context:component-scan base-package="biz" /> 14 <mvc:annotation-driven /> 15 <!-- 配置数据源 --> 16 <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 17 <property name="url" value="jdbc:mysql://localhost:3306/test" /> 18 <property name="driverClassName" value="com.mysql.jdbc.Driver" /> 19 <property name="username" value="root" /> 20 <property name="password" value="66668888ZH" /> 21 </bean> 22 <!-- 类似于ps对象的一个内容 --> 23 <bean id="jdbcTemplate" 24 class="org.springframework.jdbc.core.JdbcTemplate"> 25 <property name="dataSource" ref="dataSource" /> 26 </bean> 27 <!-- 视图解析器 --> 28 <bean id="irvr" 29 class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 30 <property name="suffix" value=".jsp" /> 31 <property name="prefix" value="/user/" /> 32 </bean> 33 <!-- 注册拦截器 --> 34 <mvc:interceptors> 35 <bean id="encode" class="interruptor.EncodeInterceptor"/> 36 </mvc:interceptors> 37 38 </beans>
web.xml:
1 <!DOCTYPE web-app PUBLIC 2 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" 3 "http://java.sun.com/dtd/web-app_2_3.dtd" > 4 5 <web-app> 6 <display-name>Archetype Created Web Application</display-name> 7 <servlet> 8 <servlet-name>springMVC</servlet-name> 9 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 10 </servlet> 11 <servlet-mapping> 12 <servlet-name>springMVC</servlet-name> 13 <url-pattern>*.mvc</url-pattern> 14 </servlet-mapping> 15 </web-app>
第三步：编写bean，dao，biz，controller，以及处理字符编码集的interrupt
1.bean包：
package bean; public class EmpBean { private Integer empNo; private String eName; private String job; private Integer mgr; private String hireDate; private Double sal; private Double comm; private Integer deptNo; public EmpBean() { // TODO Auto-generated constructor stub } 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 String getHireDate() { return hireDate; } public void setHireDate(String 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; } @Override public String toString() { return "EmpBean [empNo=" + empNo + ", eName=" + eName + ", job=" + job + ", mgr=" + mgr + ", hireDate=" + hireDate + ", sal=" + sal + ", comm=" + comm + ", deptNo=" + deptNo + "]"; } }
2.dao包：
1 package dao; 2 3 import java.sql.ResultSet; 4 import java.sql.SQLException; 5 import java.util.List; 6 7 import org.springframework.beans.factory.annotation.Autowired; 8 import org.springframework.jdbc.core.JdbcTemplate; 9 import org.springframework.jdbc.core.RowMapper; 10 import org.springframework.stereotype.Repository; 11 12 import bean.EmpBean; 13 14 @Repository 15 public class EmpDAO { 16 17 @Autowired 18 private JdbcTemplate jt; 19 20 public void add(EmpBean eb) { 21 String sql = "insert into emp values(null,?,?,?,?,?,?,?)"; 22 jt.update(sql, eb.geteName(),eb.getJob(),eb.getMgr(),eb.getHireDate(),eb.getSal(),eb.getComm(),eb.getDeptNo()); 23 } 24 25 public void delete(int empNo) { 26 String sql = "delete from emp where empno = ?"; 27 jt.update(sql,empNo); 28 } 29 30 public void update(EmpBean eb) { 31 String sql = "update emp set ename=?,job=？，mgr=?,hiredate=?,sal=?,comm=?,daptno=? where empno=?"; 32 jt.update(sql,eb.geteName(),eb.getJob(),eb.getMgr(),eb.getHireDate(),eb.getSal(),eb.getComm(),eb.getDeptNo(),eb.getEmpNo()); 33 } 34 35 public List<EmpBean>findAll(){ 36 String sql = "select * from emp"; 37 return jt.query(sql, new RowMapperImpl()); 38 } 39 40 public EmpBean findById(int empNo) { 41 String sql = "select * from emp where empNo ='" + empNo + "'"; 42 return jt.query(sql, new RowMapperImpl()).get(0); 43 } 44 } 45 46 class RowMapperImpl implements RowMapper<EmpBean>{ 47 //对象关系映射（ORM）,将查询出来的结果映射成类的属性 48 @Override 49 public EmpBean mapRow(ResultSet rs, int rowNum) throws SQLException { 50 EmpBean eb = new EmpBean(); 51 eb.setEmpNo(rs.getInt(1)); 52 eb.seteName(rs.getString(2)); 53 eb.setJob(rs.getString(3)); 54 eb.setMgr(rs.getInt(4)); 55 eb.setHireDate(rs.getString(5)); 56 eb.setSal(rs.getDouble(6)); 57 eb.setComm(rs.getDouble(7)); 58 eb.setDeptNo(rs.getInt(8)); 59 return eb; 60 } 61 }
3.biz包：
1 package biz; 2 3 import java.util.List; 4 5 import org.springframework.beans.factory.annotation.Autowired; 6 import org.springframework.stereotype.Service; 7 8 import bean.EmpBean; 9 import dao.EmpDAO; 10 11 @Service 12 public class EmpBiz { 13 14 @Autowired 15 private EmpDAO edao; 16 public void add(EmpBean eb) { 17 edao.add(eb); 18 } 19 20 public void delete(int empNo) { 21 edao.delete(empNo); 22 } 23 24 public void update(EmpBean eb) { 25 edao.update(eb); 26 } 27 28 public List<EmpBean>findAll(){ 29 return edao.findAll(); 30 } 31 32 public EmpBean findById(int empNo) { 33 return edao.findById(empNo); 34 } 35 } 36
4.controller包：
1 package controller; 2 3 import javax.servlet.http.HttpServletRequest; 4 5 import org.springframework.beans.factory.annotation.Autowired; 6 import org.springframework.stereotype.Controller; 7 import org.springframework.web.bind.annotation.RequestMapping; 8 9 import bean.EmpBean; 10 import biz.EmpBiz; 11 12 @Controller 13 @RequestMapping("/emp") 14 public class EmpController { 15 @Autowired 16 private EmpBiz eb; 17 @RequestMapping("/add") 18 public String add(EmpBean emp) { 19 eb.add(emp); 20 return "redirect:../index.jsp"; 21 } 22 23 @RequestMapping("/find") 24 public String findAll(HttpServletRequest request) { 25 request.getSession().setAttribute("ALLEMP",eb.findAll()); 26 return "redirect:../index.jsp"; 27 } 28 29 @RequestMapping("/delete") 30 public String delete(int empNo) { 31 eb.delete(empNo); 32 return "redirect:../index.jsp"; 33 } 34 35 @RequestMapping("/findbyid") 36 public String findById(int empNo , HttpServletRequest request) { 37 request.getSession().setAttribute("EMPBEAN", eb.findById(empNo)); 38 System.out.println("11111"); 39 return "redirect:../update.jsp"; 40 } 41 42 @RequestMapping("/update") 43 public String update(EmpBean emp) { 44 eb.update(emp); 45 System.out.println("22222222"); 46 return "redirect:../index.jsp"; 47 } 48 }
interrupt包：
1 package interruptor; 2 3 import javax.servlet.http.HttpServletRequest; 4 import javax.servlet.http.HttpServletResponse; 5 6 import org.springframework.web.servlet.HandlerInterceptor; 7 import org.springframework.web.servlet.ModelAndView; 8 9 //建立一个拦截器（类似于Filter） 10 public class EncodeInterceptor implements HandlerInterceptor{ 11 12 @Override 13 public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) 14 throws Exception { 15 } 16 17 @Override 18 public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, 19 ModelAndView modelAndView) throws Exception { 20 } 21 @Override 22 public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) 23 throws Exception { 24 //针对post请求的编码集操作 25 request.setCharacterEncoding("utf-8"); 26 response.setCharacterEncoding("utf-8"); 27 return true; 28 } 29 30 }
第四步：页面处理（为了方便index.jsp只查了这张表的姓名和员工编号，如果想显示更多可以进行查询，方法雷同）这里一定要注意加上isELIgnored=”false”,不然查不出来，下午找了一下午错误，原来忘了加这句话，哈哈
1.index.jsp：
1 <%@ page language="java" pageEncoding="utf-8" isELIgnored="false" %> 2 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> 3 <html> 4 <body> 5 <c:if test="${empty ALLEMP}"> 6 <c:redirect url="emp/find.mvc"/> 7 </c:if> 8 9 <c:forEach var="ei" items="${ALLEMP}"> 10 ${ei.empNo} ${ei.eName} 11 <a href="emp/delete.mvc?empNo=${ei.empNo }">删除</a> 12 <a href="emp/findbyid.mvc?empNo=${ei.empNo }">修改</a> 13 <br/> 14 </c:forEach> 15 </body> 16 </html>
2.注册新员工页面：add.jsp：
1 <%@ page language="java" pageEncoding="utf-8" isELIgnored="false"%> 2 <html> 3 <head> 4 <title>注册新员工</title> 5 <style type="text/css"> 6 table { 7 margin: 0 auto; 8 border: 1px gray solid; 9 width: 70%; 10 } 11 td,th{ 12 border: 1px gray solid; 13 } 14 </style> 15 </head> 16 <body> 17 <form action="emp/add.mvc" method="post"> 18 <table> 19 <tr> 20 <h2 align="center">公司员工注册表</h2> 21 </tr> 22 <tr> 23 <th>姓名</th> 24 <td> 25 <input type="text" name="eName"/> 26 </td> 27 </tr> 28 <tr> 29 <th>职位</th> 30 <td> 31 <input type="text" name="job"/> 32 </td> 33 </tr> 34 <tr> 35 <th>上司</th> 36 <td> 37 <input type="text" name="mgr"/> 38 </td> 39 </tr> 40 <tr> 41 <th>入职时间</th> 42 <td> 43 <input type="text" name="hireDate"/> 44 </td> 45 </tr> 46 <tr> 47 <th>薪资</th> 48 <td> 49 <input type="text" name="sal"/> 50 </td> 51 </tr> 52 <tr> 53 <th>奖金</th> 54 <td> 55 <input type="text" name="comm"/> 56 </td> 57 </tr> 58 <tr> 59 <th>部门</th> 60 <td> 61 <input type="text" name="deptNo"/> 62 </td> 63 </tr> 64 <tr> 65 <th colspan="1"> 66 <input type="submit" values = "注册新员工"/> 67 </th> 68 </tr> 69 </table> 70 </form> 71 </body> 72 </html>
3.修改页面：update.jsp：
1 <%@ page language="java" pageEncoding="utf-8" isELIgnored="false"%> 2 <html> 3 <head> 4 <title>修改员工信息</title> 5 <style type="text/css"> 6 table { 7 margin: 0 auto; 8 border: 1px gray solid; 9 width: 70%; 10 } 11 td,th{ 12 border: 1px gray solid; 13 } 14 </style> 15 16 </head> 17 <body>19 <form action="emp/update.mvc" method="post"> 20 <input type="hidden" name="empNo" value="${EMPBEAN.empNo }"/> 21 <table> 22 <tr> 23 <h2 align="center">修改员工信息</h2> 24 </tr> 25 <tr> 26 <th>姓名</th> 27 <td> 28 <input type="text" name="eName" value="${EMPBEAN.eName }"/> 29 </td> 30 </tr> 31 <tr> 32 <th>职位</th> 33 <td> 34 <input type="text" name="job" value="${EMPBEAN.job }"/> 35 </td> 36 </tr> 37 <tr> 38 <th>上司</th> 39 <td> 40 <input type="text" name="mgr" value="${EMPBEAN.mgr }"/> 41 </td> 42 </tr> 43 <tr> 44 <th>入职时间</th> 45 <td> 46 <input type="text" name="hireDate" value="${EMPBEAN.hireDate }"/> 47 </td> 48 </tr> 49 <tr> 50 <th>薪金</th> 51 <td> 52 <input type="text" name="sal" value="${EMPBEAN.sal }"/> 53 </td> 54 </tr> 55 <tr> 56 <th>奖金</th> 57 <td> 58 <input type="text" name="comm" value="${EMPBEAN.comm }"/> 59 </td> 60 </tr> 61 <tr> 62 <th>部门</th> 63 <td> 64 <input type="text" name="daptNo" value="${EMPBEAN.deptNo }"/> 65 </td> 66 </tr> 67 <tr> 68 <th colspan="2"> 69 <input type="submit" value="提交修改信息"/> 70 </th> 71 </tr> 72 </table> 73 </form> 74 75 </body> 76 </html>
以上四大步就是SpringMVC实现增删改查的具体操作。
下面我们来进行测试：
1.首先我们启动我们的服务器，然后访问我们的index.jsp页面（查找测试）：
2.访问add.jsp:并且填入新员工的信息（增加测试）：
点击提交：
小仙女添加进来了
然后点击修改进行修改测试：我们把小仙女改成老仙女
修改完成。
然后点击老仙女的删除（删除测试）
删除成功。
其实这个还可以加入BootStrap将页面进行美化操作
posted on 2018-12-23 19:33 Tom-shushu 阅读(…) 评论(…) 编辑 收藏
版权声明：本文为Tom-shushu原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。