Java中SSM框架实现增删改查功能代码详解
记录一下自己第一次整合smm框架的步骤。
1.数据库使用的是mySql,首先创建数据库ssm1,并创建表student
create database ssm1; use ssm1; CREATE TABLE student( id int(11) NOT NULL AUTO_INCREMENT, student_id int(11) NOT NULL UNIQUE, name varchar(255) NOT NULL, age int(11) NOT NULL, sex varchar(255) NOT NULL, birthday date DEFAULT NULL, PRIMARY KEY (id) ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
2.新建java web项目,命名为ssm1,并且导入相关的jar包。
3.建立pojo类,在这里命名为student,包名为com.ssm1.pojo
package com.ssm1.pojo; public class Student { private int id; private int student_id; private String name; private int age; private String sex; private String birthday; public int getId() { return id; } public void setId(int id) { this.id = id; } public int getStudent_id() { return student_id; } public void setStudent_id(int student_id) { this.student_id = student_id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public String getSex() { return sex; } public void setSex(String sex) { this.sex = sex; } public String getBirthday() { return birthday; } public void setBirthday(String birthday) { this.birthday = birthday; } }
4.建立映射器接口studentMapper,包名为com.ssm1.mapper
package com.ssm1.mapper; import java.util.List; import com.ssm1.pojo.Student; public interface StudentMapper { public int add(Student student); public void delete(int id); public Student get(int id); public int update(Student student); public List<Student> list(); }
5.建立与studentMapper对应的xml文件,同样属于包com.ssm1.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="com.ssm1.mapper.StudentMapper"> <insert id="add" parameterType="Student"> INSERT INTO student VALUES(#{student_id},#{name}, #{age}, #{sex}, #{birthday}) </insert> <!-- <insert id="add" parameterType="com.ssm1.pojo.Student" useGeneratedKeys="true" keyProperty="id"> insert into student <trim prefix="(" suffix=")" suffixOverrides="," > <if test="student_id!=null"> student_id, </if> <if test="name!=null and name!=''"> name, </if> <if test="age!=null"> age, </if> <if test="sex!=null and sex!=''"> sex, </if> <if test="birthday!=null and birthday !=''"> birthday, </if> </trim> <trim prefix="values (" suffix=")" suffixOverrides="," > <if test="student_id!=null"> #{student_id}, </if> <if test="name!=null and name!=''"> #{name}, </if> <if test="age!=null"> #{age}, </if> <if test="sex!=null and sex!=''"> #{sex}, </if> <if test="birthday!=null and birthday !=''"> #{birthday}, </if> </trim> </insert> --> <delete id="delete" parameterType="Student"> delete from student where id= #{id} </delete> <select id="get" parameterType="_int" resultType="Student"> select * from student where id= #{id} </select> <update id="update" parameterType="Student"> UPDATE student SET student_id = #{student_id}, name = #{name}, age = #{age}, sex = #{sex}, birthday = #{birthday} WHERE id = #{id} </update> <select id="list" resultType="Student"> select * from student </select> </mapper>
6.建立studentService接口,包名为com.ssm1.service
package com.ssm1.service; import java.util.List; import com.ssm1.pojo.Student; public interface StudentService { List<Student> list(); void add(Student s); void delete(Student s); void update(Student s); Student get(int id); }
7.建立studentServiceImpl类,实现接口,包名为com.ssm1.service
package com.ssm1.service; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.ssm1.mapper.StudentMapper; import com.ssm1.pojo.Student; @Service public class StudentServiceImpl implements StudentService { @Autowired StudentMapper studentMapper; @Override public List<Student> list() { // TODO Auto-generated method stub return studentMapper.list(); } @Override public void add(Student s) { // TODO Auto-generated method stub studentMapper.add(s); } @Override public void delete(Student s) { // TODO Auto-generated method stub studentMapper.delete(s.getId()); } @Override public void update(Student s) { // TODO Auto-generated method stub studentMapper.update(s); } @Override public Student get(int id) { // TODO Auto-generated method stub return studentMapper.get(id); } }
8.建立studentController控制器,包名为com.ssm1.controller
package com.ssm1.controller; import java.util.List; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; import com.github.pagehelper.PageHelper; import com.github.pagehelper.PageInfo; import com.ssm1.pojo.Student; import com.ssm1.service.StudentService; import com.ssm1.util.Page; @Controller @RequestMapping("") public class StudentController { @Autowired StudentService studentService; @RequestMapping("/index") public ModelAndView index(Page page) { ModelAndView mav = new ModelAndView(); List<Student> cs = studentService.list(); mav.addObject("cs", cs); mav.setViewName("index"); return mav; } @RequestMapping(value = "addStudent", produces = "text/html; charset=utf-8") // @RequestMapping("addStudent") public ModelAndView addStudent(Student student) { studentService.add(student); ModelAndView mav = new ModelAndView("redirect:/index"); return mav; } @RequestMapping("deleteStudent") public ModelAndView deleteStudent(Student student) { studentService.delete(student); ModelAndView mav = new ModelAndView("redirect:/index"); return mav; } @RequestMapping("editStudent") public ModelAndView editStudent(Student student) { Student s=studentService.get(student.getId()); ModelAndView mav=new ModelAndView("editStudent"); mav.addObject("s",s); return mav; } @RequestMapping("updateStudent") public ModelAndView updateStudent(Student student) { studentService.update(student); ModelAndView mav=new ModelAndView("redirect:/index"); return mav; } }
9.在WEB-INF目录下建立web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" version="2.5"> <!-- spring的配置文件--> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- spring mvc核心:分发servlet --> <servlet> <servlet-name>mvc-dispatcher</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- spring mvc的配置文件 --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springMVC.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>mvc-dispatcher</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> <filter> <filter-name>CharacterEncodingFilter</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>CharacterEncodingFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>
10.在src目录下新建applicationContext.xml文件,这是Spring的配置文件
<?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation=" http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"><!-- 配置@Service包的扫描 --> <context:annotation-config /> <context:component-scan base-package="com.ssm1.service" /> <!-- 配置数据库的连接 --> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName"> <value>com.mysql.jdbc.Driver</value> </property> <property name="url"> <value>jdbc:mysql://localhost:3306/ssm1?characterEncoding=UTF-8</value> </property> <property name="username"> <value>root</value> </property> <property name="password"> <value>admin</value> </property> </bean> <!-- 配置SQLSessionFactory --> <bean id="sqlSession" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="typeAliasesPackage" value="com.ssm1.pojo" /> <property name="dataSource" ref="dataSource"/> <property name="mapperLocations" value="classpath:com/ssm1/mapper/*.xml"/> </bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.ssm1.mapper"/> </bean> </beans>
11.在src目录下新增springMVC.xml文件
<?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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd"> <context:annotation-config/> <context:component-scan base-package="com.ssm1.controller"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <mvc:annotation-driven /> <mvc:default-servlet-handler /> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> </beans>
12.在WEB-INF下创建jsp目录,并创建文件index.jsp和editStudent.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" import="java.util.*"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Insert title here</title> </head> <body> <table align='center' border='1' cellspacing='0'> <tr> <td>id</td> <td>student_id</td> <td>name</td> <td>age</td> <td>sex</td> <td>birthday</td> <td>编辑</td> <td>删除</td> </tr> <c:forEach items="${cs}" var="c" varStatus="st"> <tr> <td>${c.id}</td> <td>${c.student_id}</td> <td>${c.name}</td> <td>${c.age}</td> <td>${c.sex}</td> <td>${c.birthday}</td> <td><a href="editStudent?id=${c.id}" rel="external nofollow" >编辑</a></td> <td><a href="deleteStudent?id=${c.id}" rel="external nofollow" >删除</a></td> </tr> </c:forEach> </table> <div style="text-align:center;margin-top:40px"> <form method="post" action="addStudent" > 学生学号: <input name="student_id" value="" type="text"> <br><br> 学生姓名: <input name="name" value="" type="text"> <br><br> 学生年纪: <input name="age" value="" type="text"> <br><br> 学生性别: <input name="sex" value="" type="text"> <br><br> 学生生日: <input name="birthday" value="" type="text"> <br><br> <input type="submit" value="增加学生"> </form> </div> <div style="text-align:center; margin-top:20px"> <form action="${pageContext.request.contextPath }/index" method="post"> <input value="刷新" type="submit"> </form> </div> </body> </html>
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" import="java.util.*"%> <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="s"%> <div style="width:500px;margin:0px auto;text-align:center"> <div style="text-align:center;margin-top:40px"> <form method="post" action="updateStudent"> 分类名称: <input name="student_id" value="${s.student_id}" type="text"> <br><br> 分类名称: <input name="name" value="${s.name}" type="text"> <br><br> 分类名称: <input name="age" value="${s.age}" type="text"> <br><br> 分类名称: <input name="sex" value="${s.sex}" type="text"> <br><br> 分类名称: <input name="birthday" value="${s.birthday}" type="text"> <br><br> <input type="hidden" value="${s.id}" name="id"> <input type="submit" value="修改分类"> </form> </div> </div>
13.最后在tomcat上部署项目,输入路径localhost:端口号/ssm1/index即可访问
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