IDEA使用Maven搭建SSM框架

搭建环境:Intellij IDEA 2017

JDK 1.8

Tomcat 8.5

MySQL 5.7

Spring 4.x

Mybatis 3.x

这个过程确实太麻烦了,我用了两个小时

所以建议用SpringBoot,简单很多很多

第一步:创建项目

创建一个空项目

第二步:创建父工程

File-->New-->Module

选中Maven,不勾选Create from Archetype,直接Next

输入组ID:通常是com.xxx.项目名

输入ArtifactID:common-parent(父工程)

点击Next,这时候刚才写的-被去掉了,可以自己加上

Finish完成

接下来会跳出来一个对话框:Non Project File Protection

点击OK

pom.xml必须要加入打包方式:pom

<?xml version="1.0" encoding="UTF-8"?>
<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>4.0.0</modelVersion>
<groupId>org.dreamtech.edu</groupId>
<artifactId>common-parent</artifactId>
<version>1.0-SNAPSHOT</version>
<!--父工程-->
<packaging>pom</packaging>
</project>

由于父工程不是用来写代码的,把src目录删除了

第三步:配置IDEA的Maven

File-->Setttings

配置自己的Maven目录和配置文件

当然,也可以采用Bundle的Maven,但是必须要修改配置文件,因为默认目录没有settings.xml

IDEA使用Maven搭建SSM框架

第四步:创建子工程

选中common-parent父工程,右键New-->Mudule

首先创建的是Model模块:

具体的选项我截图了:

IDEA使用Maven搭建SSM框架

点击Next:

输入ArtifacID:xxx-model

Next-->Next

注意要把子工程放在父工程的下面,要不然无法成功创建

点击Finish即可

然后Maven会自动下载一些东西,我们等待它完成,最多三分钟时间

打开子工程,我们在src-->main-->java目录下写Java代码

我简单地创建一个User:

package org.dreamtech.edu.model;

public class User {
private int id;
private String username;
private String password; public int getId() {
return id;
} public void setId(int id) {
this.id = id;
} public String getUsername() {
return username;
} public void setUsername(String username) {
this.username = username;
} public String getPassword() {
return password;
} public void setPassword(String password) {
this.password = password;
} @Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", password='" + password + '\'' +
'}';
}
}

同目录下有一个App.java文件是自动生产的,没有什么用,删除了就行

然后用同样的方式创建子工程:Service层DAO层

命名方式通常是:xxx-service、xxx-dao

接下来创建Web层,需要选择的就不是quickstart了

IDEA使用Maven搭建SSM框架

然后创建API层,也就是后台提供的接口:和上边Web层一样

第五步:具体配置

子工程已经创建完成了,下面是具体的配置

首先,model层、service层、dao层需要在pom.xml配置packging

    <packaging>jar</packaging>

然后在web层和api层需要配置成war,但是已经默认配置好了,所以不需要自行配置

在父工程中配置公共的依赖:

删除在每一个子工程中创建的依赖,找到每个pom.xml,剪切这一部分,复制到父工程的pom.xml中:

    <dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
</dependencies>

在父工程的pom.xml中可以进行版本号的配置:

    <!--公共版本号管理-->
<properties>
<junit.version>4.11</junit.version>
<spring.version>4.3.14.RELEASE</spring.version>
<mybatis.version>3.4.1</mybatis.version>
<mybatis-spring.version>1.3.1</mybatis-spring.version>
<log4j.version>1.2.17</log4j.version>
<slf4j.version>1.7.12</slf4j.version>
<jstl.version>1.2</jstl.version>
<taglibs.version>1.1.2</taglibs.version>
<c3p0.version>0.9.5.2</c3p0.version>
<mysql.version>5.1.35</mysql.version>
</properties>
<!--公共依赖-->
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>

Web层的配置:

pom.xml进行SpringMVC的配置

    <!--添加依赖-->
<dependencies>
<!--SpringMVC-->
<!--aop-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>${spring.version}</version>
</dependency>
<!--aspects-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<!--beans-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<!--context-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<!--core-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<!--expression-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-expression</artifactId>
<version>${spring.version}</version>
</dependency>
<!--jdbc-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<!--orm-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>${spring.version}</version>
</dependency>
<!--tx-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${spring.version}</version>
</dependency>
<!--test-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!--web-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<!--webmvc-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
</dependencies>

注意:IDEA右下角有一个提示,点击允许Maven自动导包

配置Tomcat:

右上角启动箭头左边有个下拉框,点击编辑配置:

先导入需要运行的工程,点击绿色加号部署

这里先部署web层的war exploded,因为api部分还没有完成

IDEA使用Maven搭建SSM框架

然后配置热更新:

IDEA使用Maven搭建SSM框架

然后就可以点击绿色的开始箭头开启Tomcat了

如果出现了下面这种情况,说明,之前的配置全都正确了!

IDEA使用Maven搭建SSM框架

SpringMVC的配置文件:

说到配置文件,那么它们应该放在哪里呢?

打开web层子工程,然后在main下新建java目录,右键Mark Dir As-->Sources Root

java文件夹就是我们放java源码的地方

再新建一个目录,resources作为存放配置文件的地方

右键resources,mark dir as-->resources root

如果都配置正确,目录结构应该是下面这样:

IDEA使用Maven搭建SSM框架

然后我们看看具体的SpringMVC配置文件:

写一个最简单的Controller(在刚才新建的java文件夹中):

package org.dreamtech.edu.web.controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping; @Controller
@RequestMapping("user")
public class UserController {
@RequestMapping("login")
public String login(){
System.out.println("Hello");
return null;
}
}

配置web.xml:这里需要修改约束,自动生成的版本太低

<?xml version="1.0" encoding="UTF-8"?>
<web-app
version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name>Archetype Created Web Application</display-name>
<!-- 配置SpringMVC-->
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<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>DispatcherServlet</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>

然后配置SpringMVC:

<?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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.3.xsd"> <!-- 1.注解扫描位置-->
<context:component-scan base-package="org.dreamtech.edu.web.controller"/> <!-- 2.配置映射处理和适配器-->
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/> <!-- 3.视图的解析器-->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/Modules/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>

跑起来项目:

访问http://localhost:8080/user/login.do

发现在控制台打印了hello,配置成功

其实SpringMVC的配置还没有结束

但我们先来看DAO层的配置

DAO层的配置:

pom.xml配置

首先需要依赖model层

    <dependencies>
<dependency>
<groupId>org.dreamtech.edu</groupId>
<artifactId>edu-model</artifactId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>

依赖Mybatis包:

        <!-- 依赖mybatis -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>

写入一些简单的代码:

抽取Mapper:

package org.dreamtech.edu.mapper.base;

public interface BaseMapper<T> {
public T findById(Integer id); public T findByUUID(String uuid); public void deleteById(Integer id); public void deleteByUUID(String uuid); public void update(T t); public void insert(T t);
}

继承:

package org.dreamtech.edu.mapper;

import org.dreamtech.edu.mapper.base.BaseMapper;
import org.dreamtech.edu.model.User; public interface UserMapper extends BaseMapper<User> { }

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.dreamtech.edu.mapper.UserMapper">
<select id="findById" resultType="user" parameterType="int">
SELECT * FROM t_user WHERE id = #{id}
</select>
</mapper>

DAO层就先配到这里

Service层的配置:

依赖DAO层

    <dependencies>
<dependency>
<artifactId>edu-dao</artifactId>
<groupId>org.dreamtech.edu</groupId>
<version>1.0-SNAPSHOT</version>
</dependency>
</dependencies>

依赖Spring:

        <!-- 添加spring依赖 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</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-tx</artifactId>
<version>${spring.version}</version>
</dependency>

Service层简单代码:

package org.dreamtech.edu.service.base;

public interface IBaseService<T> {
public T findById(Integer id); public T findByUUID(String uuid); public void deleteById(Integer id); public void deleteByUUID(String uuid); public void update(T t); public void insert(T t);
}
package org.dreamtech.edu.service.base;

import org.dreamtech.edu.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired; public abstract class BaseServiceImpl<T> implements IBaseService<T> {
@Autowired
protected UserMapper userMapper;
}
package org.dreamtech.edu.service;

import org.dreamtech.edu.model.User;
import org.dreamtech.edu.service.base.IBaseService; public interface IUserService extends IBaseService<User>{ public User login(String username,String password);
}
package org.dreamtech.edu.service.impl;

import org.dreamtech.edu.model.User;
import org.dreamtech.edu.service.IUserService;
import org.dreamtech.edu.service.base.BaseServiceImpl;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional; @Service
@Transactional
public class UserServiceImpl extends BaseServiceImpl<User> implements IUserService{ @Override
public User login(String username, String password) {
return null;
} @Override
public User findById(Integer id) {
return userMapper.findById(id);
} @Override
public User findByUUID(String uuid) {
return null;
} @Override
public void deleteById(Integer id) { } @Override
public void deleteByUUID(String uuid) { } @Override
public void update(User user) { } @Override
public void insert(User user) { }
}

这么多行的代码,其实只实现了一个功能,就是根据ID查找用户

继续配置Web层:

添加Service依赖:

        <dependency>
<artifactId>edu-service</artifactId>
<groupId>org.dreamtech.edu</groupId>
<version>1.0-SNAPSHOT</version>
</dependency>

导入需要的其他依赖:

       <!--MyBatis-->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis-spring.version}</version>
</dependency>
<!--数据库驱动-->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!--数据连接池-->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>${c3p0.version}</version>
</dependency> <!--其他-->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>${taglibs.version}</version>
</dependency>
<!--日志-->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${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>
<!--导入servlet-api/jsp-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>javax.servlet.jsp-api</artifactId>
<version>2.3.1</version>
<scope>provided</scope>
</dependency>

数据库建一张简单的表,在后面测试:

CREATE TABLE `t_user` (
`id` int(32) NOT NULL,
`username` varchar(32) NOT NULL,
`password` varchar(32) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

添加其他的配置文件,放在resources文件夹

Spring配置文件: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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.3.xsd"> <context:property-placeholder location="classpath:db.properties"/> <!-- 配置数据源 -->
<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="30"/>
<property name="minPoolSize" value="2"/>
</bean> <!-- 配置sessionFactory -->
<bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<!--配置别名-->
<property name="typeAliasesPackage" value="org.dreamtech.edu.model"/>
<!--配置加载映射文件 UserMapper.xml-->
<property name="mapperLocations" value="classpath:org/dreamtech/edu/mapper/*Mapper.xml"/>
</bean>
<!-- 自动生成dao,mapper-->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="org.dreamtech.edu.mapper"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactoryBean"/>
</bean>
<!--自动扫描Service-->
<context:component-scan base-package="org.dreamtech.edu"/>
<!-- 配置事务-->
<!-- 5.配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 6.开启事务注解-->
<tx:annotation-driven/>
</beans>

properties:

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/edu
jdbc.username=root
jdbc.password=xuyiqing
# Global logging configuration
log4j.rootLogger=DEBUG, stdout
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n

web.xml加入Spring配置:

  <!-- 配置spring-->
<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>

UserController:

package org.dreamtech.edu.web.controller;

import org.dreamtech.edu.model.User;
import org.dreamtech.edu.service.IUserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping; @Controller
@RequestMapping("user")
public class UserController { @Autowired
private IUserService userService; @RequestMapping("login")
public String login(){
System.out.println("Hello");
return null;
} @RequestMapping("find")
public String find(Integer id){
User user = userService.findById(id);
return null;
}
}

现在就可以启动,访问/user/login.do是没问题的

但是如果访问/user/find会报错

这是因为在DAO层:UserMapper.xml在打包的时候不存在

解决:在DAO层的pom.xml的build下面配置:

    <build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.xml</include>
</includes>
</resource>
</resources>

运行!

http://localhost:8080/user/find.do?id=1

不报错,然后我们在数据库随便添加一条信息,在controller层输出

到这里,其实搭建就结束了!

但是还有一步:

页面整合:

页面应该放在哪里呢?

放在WEB-INF目录中:

JS、CSS、图片等静态资源放在WEB-INF同级下,页面放在WEB-INF中

可以新建一个目录,放入页面,再把文件夹放到WEB-INF

其实之前SpringMVC就是这么配的

    <bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/Modules/"/>
<property name="suffix" value=".jsp"/>
</bean>

在Controller中只需要返回JSP的名称字符串就可以了:

    @RequestMapping("login")
public String login(){
System.out.println("Hello");
return "Default";
}
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