这篇文章主要讲解了Java中SSM框架如何实现增删改查，内容清晰明了，对此有兴趣的小伙伴可以学习一下，相信大家阅读完之后会有帮助。
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=${c.id}" rel="external nofollow" >删除</a></td>
</tr>
</c:forEach>
</table>
<div >
<form method="post" action="addStudent" >
学生学号： <input name="student_id" value="" type="text"> <br><br>
学生姓名： <input name="name" value="" type="text"> <br><br>
学生年纪： <input name="age" value="" type="text"> <br><br>
学生性别： <input name="sex" value="" type="text"> <br><br>
学生生日： <input name="birthday" value="" type="text"> <br><br>
<input type="submit" value="增加学生">
</form>
</div>
<div >
<form action="${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 >
<div >
<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
看完上述内容，是不是对Java中SSM框架如何实现增删改查有进一步的了解，如果还想学习更多内容，欢迎关注亿速云行业资讯频道。
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