ssm搭建简单web项目实现CURD
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在之前已经对spring,spring-mvc,mybatis等框架有了了解,spring整合mybatis也进行了练习,ssm框架就是这三种框架的简称,那么我们如何使用这三种框架来设计web项目呢?
今天就简单的使用ssm框架搭建web项目,实现增删改查等基本操作:
导入需要使用的依赖文件:
<dependencies> <!--核心包--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>5.1.8.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.1.8.RELEASE</version> </dependency> <!--数据连接包--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>5.1.8.RELEASE</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.10</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.45</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>2.0.2</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.6</version> </dependency> <!--事务包--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>5.1.8.RELEASE</version> </dependency> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>2.5</version> </dependency> </dependencies>
创建数据库,实体;
package com.zs.entity; import org.springframework.format.annotation.DateTimeFormat; import java.util.Date; public class Emp private int empno; private String ename; private String job; private int deptno; private double sal; @DateTimeFormat(pattern = "yyyy-MM-dd") private Date hiredate; public Emp() public Emp(int empno, String ename, String job, int deptno, double sal, Date hiredate) this.empno = empno; this.ename = ename; this.job = job; this.deptno = deptno; this.sal = sal; this.hiredate = hiredate; 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; public int getDeptno() return deptno; public void setDeptno(int deptno) this.deptno = deptno; public double getSal() return sal; public void setSal(double sal) this.sal = sal; public Date getHiredate() return hiredate; public void setHiredate(Date hiredate) this.hiredate = hiredate; @Override public String toString() return "Emp" + "empno=" + empno + ", ename=‘" + ename + ‘\\‘‘ + ", job=‘" + job + ‘\\‘‘ + ", deptno=" + deptno + ", sal=" + sal + ", hiredate=" + hiredate + ‘‘;
dao层:
package com.zs.dao; import com.zs.entity.Emp; import org.apache.ibatis.annotations.Param; import java.util.List; public interface IEmpDao /** * 查询员工,条件查询/所有 * @return */ List<Emp> listEmp(@Param("empno") Integer empno); /** * 插入 * @param emp * @return */ int insertEmp(Emp emp); /** * 修改 * @param emp * @return */ int updateEmp(Emp emp); /** * 删除 * @param empno * @return */ int deleteEmp(int empno);
mapper文件:
<!DOCTYPE mapper PUBLIC "-//mybatis.org// Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd"> <mapper namespace="com.zs.dao.IEmpDao"> <select id="listEmp" resultType="Emp"> select * from emp <where> <if test="empno!=null"> and empno=#empno </if> </where> </select> <insert id="insertEmp" parameterType="Emp"> insert into emp(ename,job,deptno,sal,hiredate) value(#ename,#job,#deptno,#sal,#hiredate) </insert> <update id="updateEmp" parameterType="Emp"> update emp set ename=#ename,job=#job,deptno=#deptno,sal=#sal,hiredate=#hiredate where empno=#empno </update> <delete id="deleteEmp" > delete from emp where empno=#empno </delete> </mapper>
以上的文件都可以采用mybatis插件自动生成
service接口及实现类
package com.zs.service; import com.zs.entity.Emp; import org.springframework.stereotype.Service; import java.util.List; public interface EmpService /** * 查询所有 * @return */ List<Emp> listEmp(Integer empno); /** * 插入 * @param emp * @return */ boolean insertEmp(Emp emp); /** * 修改 * @param emp * @return */ boolean updateEmp(Emp emp); /** * 删除 * @param empno * @return */ boolean deleteEmp(int empno);
package com.zs.service; import com.zs.dao.IEmpDao; import com.zs.entity.Emp; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import java.util.List; @Service public class EmpServiceImpl implements EmpService @Autowired private IEmpDao empDao; @Override public List<Emp> listEmp(Integer empno) return empDao.listEmp(empno); @Override public boolean insertEmp(Emp emp) return empDao.insertEmp(emp)>0; @Override public boolean updateEmp(Emp emp) return empDao.updateEmp(emp)>0; @Override public boolean deleteEmp(int empno) return empDao.deleteEmp(empno) > 0;
控制器:
package com.zs.controller; import com.zs.entity.Emp; import com.zs.service.EmpService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.RequestMapping; import java.util.List; @Controller public class EmpController @Autowired private EmpService empService; @RequestMapping("/list.action") private String show(Model model) List<Emp> emps = empService.listEmp(null); model.addAttribute("emps", emps); return "listEmp"; @RequestMapping("/insert.action") private String insert(Emp emp) boolean b = empService.insertEmp(emp); return "redirect:/list.action"; @RequestMapping("/getEmp.action") public String getByEmpno(int empno,Model model) List<Emp> emps = empService.listEmp(empno); model.addAttribute("emp", emps.get(0)); return "update"; @RequestMapping("/update.action") private String update(Emp emp) boolean b = empService.updateEmp(emp); return "redirect:/list.action"; @RequestMapping("/delete.action") private String delete(int empno) boolean b = empService.deleteEmp(empno); return "redirect:/list.action"; @RequestMapping("/add.action") public String insert() return "insert";
配置文件:
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql:///test?characterEncoding=utf-8
jdbc.username=root
jdbc.password=123456
<?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:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!--扫描包--> <context:component-scan base-package="com.zs"/> <!--加载数据库配置文件--> <context:property-placeholder location="classpath:jdbc.properties"/> <!--配置连接池--> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <property name="driverClassName" value="$jdbc.driver"/> <property name="url" value="$jdbc.url"/> <property name="username" value="$jdbc.username"/> <property name="password" value="$jdbc.password"/> </bean> <!--配置mybatis工厂--> <bean class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="typeAliasesPackage" value="com.zs.entity"/> <property name="mapperLocations" value="classpath:mapper/*.xml"/> </bean> <!--配置mapper映射dao接口--> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.zs.dao"/> </bean> <!--spring事务管理器--> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"/> </bean> <!--启用事务注解配置--> <tx:annotation-driven/> </beans>
<?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: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.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--扫描控制器包--> <context:component-scan base-package="com.zs.controller"/> <!--spring-mvc简易配置--> <mvc:annotation-driven/> <!--默认不拦截静态资源--> <mvc:default-servlet-handler/> <!--配置视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/view/"/> <property name="suffix" value=".jsp"/> </bean> </beans>
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" version="4.0"> <!--配置spring工厂监听器--> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <!--配置servlet,默认将指定请求交给spring-mvc处理--> <servlet> <servlet-name>spring-mvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring-mvc.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>spring-mvc</servlet-name> <url-pattern>*.action</url-pattern> </servlet-mapping> <!--设置过滤器,将请求的数据格式转为utf-8,针对post请求的乱码问题--> <filter> <filter-name>CharacterEncoding</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>CharacterEncoding</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>
页面:
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %> <%@ taglib prefix="fm" uri="http://java.sun.com/jsp/jstl/fmt" %> <%-- Created by IntelliJ IDEA. User: Administrator Date: 2019/8/7 Time: 15:58 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <table cellspacing="1" border="1" style="text-align: center"> <tr> <th>编号</th> <th>姓名</th> <th>工作</th> <th>部门</th> <th>工资</th> <th>入职日期</th> <th>操作</th> </tr> <tbody> <c:forEach items="$emps" var="emp" varStatus="i"> <tr> <td>$i.count</td> <td>$emp.ename</td> <td>$emp.job</td> <td>$emp.deptno</td> <td>$emp.sal</td> <td><fm:formatDate value="$emp.hiredate" pattern="yyyy-MM-dd"/></td> <td> <a href="getEmp.action?empno=$emp.empno">修改</a> <a href="delete.action?empno=$emp.empno">删除</a> <a href="add.action">插入</a> </td> </tr> </c:forEach> </tbody> </table> </body> </html>
<%@ taglib prefix="fm" uri="http://java.sun.com/jsp/jstl/fmt" %> <%-- Created by IntelliJ IDEA. User: Administrator Date: 2019/8/7 Time: 16:32 To change this template use File | Settings | File Templates. --%> <%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <head> <title>Title</title> </head> <body> <form action="update.action" method="post"> <input type="hidden" value="$emp.empno" name="empno"/> 姓名<input type="text" value="$emp.ename" name="ename"/><br/> 工作<input type="text" value="$emp.job" name="job"/><br/> 部门<input type="text" value="$emp.deptno" name="deptno"/><br/> 工资<input type="text" value="$emp.sal" name="sal"/><br/> 入职日期<input type="date" value="<fm:formatDate value="$emp.hiredate" pattern="yyyy-MM-dd"/>" name="hiredate"/><br/> <input type="submit"> </form> </body> </html>
运行tomcat测试
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