本篇笔记记录了使用IDEA 2020 整合SSM框架(spring+springmvc+mybatis)的详细过程
准备工作
- IntelliJ IDEA 2020.3.1
- apache-maven-3.6.3
- jdk 1.9
- Tomcat 9.0
- mysql5.7.31
创建测试数据
创建数据库
CREATE DATABASE IF NOT EXISTS jmsite DEFAULT CHARSET utf8 COLLATE utf8_general_ci;
选择数据库
USE jmsite;
创建表
CREATE TABLE `user` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`name` VARCHAR(50) DEFAULT '',
`status` TINYINT(4) DEFAULT '0',
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
插入测试数据
INSERT INTO `user` (`name`, `status`) VALUES ('账户1', 1);
INSERT INTO `user` (`name`, `status`) VALUES ('账户2', 0);
INSERT INTO `user` (`name`, `status`) VALUES ('账户3', 1);
INSERT INTO `user` (`name`, `status`) VALUES ('账户4', 1);
创建maven项目
选择原型archetype
设置项目属性
设置maven
配置pom.xml
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.9</maven.compiler.source>
<maven.compiler.target>1.9</maven.compiler.target>
<spring.version>5.0.2.RELEASE</spring.version>
<slf4j.version>1.6.6</slf4j.version>
<log4j.version>1.2.12</log4j.version>
<mysql.version>5.1.6</mysql.version>
<mybatis.version>3.4.5</mybatis.version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!-- spring -->
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.6.8</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- log start -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>${slf4j.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j.version}</version>
</dependency>
<!-- log end -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
</dependencies>
重新加载
创建包和目录
创建时选择目录属性,避免遗忘报错
创建类文件
在domain中创建User实体类
package org.jmsite.domain;
import java.io.Serializable;
public class User implements Serializable {
private Integer id;
private String name;
private Integer status;
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 getStatus() {
return status;
}
public void setStatus(Integer status) {
this.status = status;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", name='" + name + '\'' +
", status=" + status +
'}';
}
}
在dao中创建UserDao接口
package org.jmsite.dao;
import org.jmsite.domain.User;
import org.springframework.stereotype.Repository;
import java.util.List;
@Repository
public interface UserDao {
public List<User> getList();
}
在service中创建UserService接口
package org.jmsite.service;
import org.jmsite.domain.User;
import java.util.List;
public interface UserService {
public List<User> getList();
}
在impl中创建UserService实现类
package org.jmsite.service.impl;
import org.jmsite.dao.UserDao;
import org.jmsite.domain.User;
import org.jmsite.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service("userService")
public class UserServiceImpl implements UserService {
@Autowired
private UserDao userDao;
@Override
public List<User> getList() {
return userDao.getList();
}
}
在mappers中创建UserMapper.xml
<?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="org.jmsite.dao.UserDao">
<select id="getList" resultType="org.jmsite.domain.User">
SELECT * FROM `user`
</select>
</mapper>
在resources中配置ssm
配置jdbc,创建jdbc.properties
jdbc.driver=com.mysql.jdbc.Driver
#数据库地址
jdbc.url=jdbc:mysql://localhost:3306/jmsite?autoReconnect=true&useUnicode=true&characterEncoding=utf8
#用户名
jdbc.username=root
#密码
jdbc.password=
#最大连接数
c3p0.maxPoolSize=30
#最小连接数
c3p0.minPoolSize=2
#关闭连接后不自动commit
c3p0.autoCommitOnClose=false
#获取连接超时时间
c3p0.checkoutTimeout=10000
#当获取连接失败重试次数
c3p0.acquireRetryAttempts=2
配置log4j,创建log4j.properties
# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE, LOGFILE debug info warn error fatal
log4j.rootCategory=INFO, CONSOLE
# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE
# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n
# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=d:\\axis.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n
配置mybatis,创建mybatis-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<!-- 打印查询语句 -->
<setting name="logImpl" value="STDOUT_LOGGING" />
<!-- 使用jdbc的getGeneratedKeys获取数据库自增主键值 -->
<setting name="useGeneratedKeys" value="true" />
<!-- 使用列别名替换列名 默认:true -->
<setting name="useColumnLabel" value="true" />
<!-- 开启驼峰命名转换:Table{create_time} -> Entity{createTime} -->
<setting name="mapUnderscoreToCamelCase" value="true" />
</settings>
<!-- 配置全局属性 -->
</configuration>
配置springmvc,创建springmvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<!--开启注解扫描,只扫描Controller注解-->
<context:component-scan base-package="org.jmsite.controller" />
<!--开启SpringMVC注解的支持-->
<mvc:annotation-driven>
</mvc:annotation-driven>
<!--配置的视图解析器对象-->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
<mvc:default-servlet-handler/>
<!--过滤静态资源-->
<!--<mvc:resources location="/public/" mapping="/public/**" />-->
</beans>
配置spring,创建applicationContext.xml
<?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
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!--开启注解的扫描,希望处理service和dao,controller不需要Spring框架去处理-->
<context:component-scan base-package="org.jmsite" >
<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
</context:component-scan>
<!--加载jdbc配置-->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 数据库连接池 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${jdbc.driver}"/>
<property name="jdbcUrl" value="${jdbc.url}"/>
<property name="user" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<property name="maxPoolSize" value="${c3p0.maxPoolSize}"/>
<property name="minPoolSize" value="${c3p0.minPoolSize}"/>
<property name="autoCommitOnClose" value="${c3p0.autoCommitOnClose}"/>
<property name="checkoutTimeout" value="${c3p0.checkoutTimeout}"/>
<property name="acquireRetryAttempts" value="${c3p0.acquireRetryAttempts}"/>
</bean>
<!-- 配置SqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="typeAliasesPackage" value="org.jmsite.domain"></property>
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
<property name="mapperLocations" value="classpath:mappers/*.xml"></property>
</bean>
<!-- 用于扫描mapper接口的配置(mapper解析器) -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="org.jmsite.dao"></property>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>
<!-- 事务管理 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!--数据库连接池-->
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 指明使用注解的方式来管理事务 -->
<tx:annotation-driven transaction-manager="transactionManager" />
</beans>
配置web.xml
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<!-- 解决乱码的过滤器 -->
<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>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!--加载springmvc.xml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>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>
创建控制器和模版
创建UserController
package org.jmsite.controller;
import org.jmsite.domain.User;
import org.jmsite.service.UserService;
import org.jmsite.service.impl.UserServiceImpl;
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 java.util.List;
@Controller
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
@RequestMapping("/getList")
public ModelAndView getList()
{
ModelAndView mv = new ModelAndView();
List<User> user = userService.getList();
System.out.println(user);
mv.addObject("list", user);
mv.setViewName("user");
return mv;
}
}
创建模版文件,webapp/WEB-INF/pages/user.jsp
<%--
Created by IntelliJ IDEA.
User: jmsite.cn
Date: 2021/2/22
Time: 21:57
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<table>
<c:forEach items="${list}" var="user">
<tr>
<td><c:out value="${user.id}"/></td>
<td><c:out value="${user.name}"/></td>
<td><c:out value="${user.status}"/></td>
</tr>
</c:forEach>
</table>
</body>
</html>
项目结构最终如下
配置tomcat
打开配置界面
配置tomcat
切换“deployment”
按图选择
更改application context
ok
运行tomcat
浏览器访问