菜鸟修行之路----框架篇：SSM框架整合
SSM框架整合
Spring+Spring MVC +Mybatis
Spring MVC负责实习MVC设计模式，MyBatis负责数据持久层，Spring负责管理SpringMVC和Mybatis的对象的创建和依赖注入。
整合步骤
1.创建Mave工程，pom.xml完成相关依赖。
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<groupId>com.ssm_studygroupId>
<artifactId>ssm_studyartifactId>
<version>1.0-SNAPSHOTversion>
<dependencies>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>5.0.2.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>5.0.2.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-aopartifactId>
<version>5.0.2.RELEASEversion>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-aspectsartifactId>
<version>5.2.3.RELEASEversion>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>3.5.4version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>2.0.4version>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>8.0.19version>
dependency>
<dependency>
<groupId>c3p0groupId>
<artifactId>c3p0artifactId>
<version>0.9.5.2version>
dependency>
<dependency>
<groupId>jstlgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>4.0.0version>
dependency>
dependencies>
<build>
<finalName>ssmfinalName>
<resources>
<resource>
<directory>src/main/javadirectory>
<includes>
<include>**/*.xmlinclude>
includes>
resource>
<resource>
<directory>src/main/resourcesdirectory>
<includes>
<include>*.xmlinclude>
<include>*.propertiesinclude>
includes>
resource>
resources>
build>
project>
2.在web.xml中配置Spring MVC（程序入口）、Spring、字符编码过滤器（处理中文乱码）、静态资源加载。
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="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"
id="MyWebApp" version="2.5">
<display-name>SSM_Studydisplay-name>
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring.xmlparam-value>
context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
<servlet>
<servlet-name>dispatcherServletservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:springmvc.xmlparam-value>
init-param>
servlet>
<servlet-mapping>
<servlet-name>dispatcherServletservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
<filter>
<filter-name>characterEncodingFilterfilter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
<init-param>
<param-name>encodingparam-name>
<param-value>UTF-8param-value>
init-param>
filter>
<filter-mapping>
<filter-name>characterEncodingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<servlet-mapping>
<servlet-name>defaultservlet-name>
<url-pattern>*.jsurl-pattern>
servlet-mapping>
<servlet-mapping>
<servlet-name>defaultservlet-name>
<url-pattern>*.cssurl-pattern>
servlet-mapping>
<servlet-mapping>
<servlet-name>defaultservlet-name>
<url-pattern>*.jpgurl-pattern>
servlet-mapping>
web-app>
3.在spring.xml中配置spring和mybatis整合
<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.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="user" value="root">property>
<property name="password" value="123456">property>
<property name="jdbcUrl" value="">property>
<property name="driverClass" value="com.mysql.cj.jdbc.Driver">property>
<property name="initialPoolSize" value="5">property>
<property name="maxPoolSize" value="10">property>
bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource">property>
<property name="mapperLocations " value="classpath:com/ssm_study/repository/*.xml">property>
<property name="configLocation" value="classpath:config.xml">property>
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.ssm_study.repository">property>
bean>
beans>
4.在config.xml配置mybatis的辅助信息，例如打印SQL等。
<configuration>
<settings>
<setting name="logImpl" value="STDOUT_LOGGING">setting>
settings>
<typeAliases>
<package name="com.ssm_study.entity">package>
typeAliases>
<plugins>
<plugin interceptor="com.github.pagehelper.PageHelper">
<property name="dialect" value="mysql"/>
<property name="rowBoundsWithCount" value="true"/>
plugin>
plugins>
configuration>
4.配置springmvc.xml
<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.xsd
http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<mvc:annotation-driven>mvc:annotation-driven>
<context:component-scan base-package="com.ssm_study">context:component-scan>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/">property>
<property name="suffix" value=".jsp">property>
bean>
beans>
4.业务代码
简单的单表查询功能
实体类
package com.ssm_study.entity;
public class User {
private Integer id;
private String name;
private Integer age;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}
数据访问层
package com.ssm_study.repository;
import com.ssm_study.entity.User;
import java.util.List;
public interface UserRepository {
public List<User> findAll();
}
mapper.xml文件
<mapper namespace="com.ssm_study.repository.UserRepository">
<select id="findAll" resultType="User">
select * from user
select>
mapper>
业务处理层
service接口
package com.ssm_study.service;
import com.ssm_study.entity.User;
import java.util.List;
public interface UserService {
public List<User> findAll();
}
具体实现
package com.ssm_study.service.impl;
import com.ssm_study.entity.User;
import com.ssm_study.repository.UserRepository;
import com.ssm_study.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserServiceImpl implements UserService {
@Autowired
private UserRepository userRepository;
public List<User> findAll() {
return userRepository.findAll();
}
}
视图控制器
package com.ssm_study.controller;
import com.ssm_study.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
@Controller
@RequestMapping("/user")
public class UserHandler {
@Autowired
private UserService userService;
@GetMapping("findAll")
public ModelAndView index(){
ModelAndView modelAndView=new ModelAndView();
modelAndView.setViewName("index");
modelAndView.addObject("list",userService.findAll());
return modelAndView;
}
}
5.前端代码
<%@ page contentType="text/html; charset=UTF-8" language="java" %>
<%@ page isELIgnored="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title></title>
</head>
<body>
<c:forEach items="${list}" var="user">
${user.id}--${user.name}--${user.age}<br/>
</c:forEach>
</body>
</html>
修行之路艰辛，与君共勉。
2020年3月 成都