IDEA搭建一个简单的SSM项目
1，使用IDEA创建一个maven-webapp项目
1.1，File->New->Project
1.2，输入maven项目信息，Next
1.3，这一页不建议修改保持默认即可
1.4，确定项目名和项目路径点Finish
2，maven依赖和构造项目目录
2.1，pom.xml如下
<?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>com.demo</groupId> <artifactId>ssm_demo</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>ssm_demo Maven Webapp</name> <!-- FIXME change it to the project's website --> <url>http://www.example.com</url> <!-- 用来设置版本号 --> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <maven.compiler.source>1.7</maven.compiler.source> <maven.compiler.target>1.7</maven.compiler.target> <srping.version>4.0.2.RELEASE</srping.version> <mybatis.version>3.2.8</mybatis.version> <slf4j.version>1.7.12</slf4j.version> <log4j.version>1.2.17</log4j.version> <druid.version>1.0.9</druid.version> </properties> <!-- 用到的jar包 --> <dependencies> <!-- 单元测试 --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <!-- 表示开发的时候引入，发布的时候不会加载此包 --> <scope>test</scope> </dependency> <!-- spring框架包 --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-oxm</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${srping.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${srping.version}</version> </dependency> <!-- spring框架包 --> <!-- mybatis框架包 --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.2.2</version> </dependency> <!-- mybatis框架包 --> <!-- 数据库驱动 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.47</version> </dependency> <!-- 导入dbcp的jar包，用来在applicationContext.xml中配置数据库 --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>1.4</version> </dependency> <!-- jstl标签类 --> <dependency> <groupId>jstl</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!-- log --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${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> <!-- 连接池 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>${druid.version}</version> </dependency> </dependencies> <build> <finalName>ssm_demo</finalName> <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.2</version> <configuration> <source>1.8</source> <target>1.8</target> <encoding>UTF-8</encoding> </configuration> </plugin> <plugin> <artifactId>maven-clean-plugin</artifactId> <version>3.1.0</version> </plugin> <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --> <plugin> <artifactId>maven-resources-plugin</artifactId> <version>3.0.2</version> </plugin> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.0</version> </plugin> <plugin> <artifactId>maven-surefire-plugin</artifactId> <version>2.22.1</version> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>3.2.2</version> </plugin> <plugin> <artifactId>maven-install-plugin</artifactId> <version>2.5.2</version> </plugin> <plugin> <artifactId>maven-deploy-plugin</artifactId> <version>2.8.2</version> </plugin> </plugins> </pluginManagement> </build> </project>
2.2，main目录下创建java和resources文件，Mark as对应的sources和resources，resources下创建mapper文件夹
2.3，构造项目结构
3，配置文件
3.1，jdbc.properties
driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/ssm_demo?useSSL=false
username=root
password=
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000
3.2，log4j.properties
#日志输出级别
log4j.rootLogger=debug,stdout,D,E
#设置stdout的日志输出控制台
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
#输出日志到控制台的方式，默认为System.out
log4j.appender.stdout.Target = System.out
#设置使用灵活布局
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
#灵活定义输出格式
log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss,SSS} -[%p] method:[%c (%rms)] - %m%n
3.3，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:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- 加载properties文件 --> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="location" value="classpath:jdbc.properties"/> </bean> <!-- 配置数据源 --> <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"> <property name="driverClassName" value="${driver}"/> <property name="url" value="${url}"/> <property name="username" value="${username}"/> <property name="password" value="${password}"/> </bean> <!-- mybatis和spring完美整合，不需要mybatis的配置映射文件 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <!-- 配置数据源 --> <property name="dataSource" ref="dataSource"/> <!-- 扫描pojo包 --> <property name="typeAliasesPackage" value="com.ssm.pojo"/> <!-- 扫描mapper需要的xml文件 --> <property name="mapperLocations" value="classpath:mapper/*.xml"/> </bean> <!-- Mapper动态代理开发，扫描dao接口包 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <!-- 注入sqlSessionFactory --> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> <!-- 扫描dao接口包 --> <property name="basePackage" value="com.ssm.dao"/> </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> </beans>
3.4，springmvc.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: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/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> <!-- 扫描注解，ssm包下所有 --> <context:component-scan base-package="com.ssm"/> <!-- 开启SpringMVC注解模式 --> <mvc:annotation-driven/> <!-- 静态资源默认servlet配置 --> <mvc:default-servlet-handler/> <!-- 配置返回视图的路径，以及识别后缀是jsp文件 --> <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>
3.5，web.xml
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> <display-name>mvcDemo</display-name> <!--项目的欢迎页，项目运行起来后访问的页面--> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <!-- 注册ServletContext监听器，创建容器对象，并且将ApplicationContext对象放到Application域中 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 指定spring核心配置文件 --> <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> <!-- 配置前端控制器 --> <servlet> <servlet-name>springmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <!-- 指定配置文件位置和名称 如果不设置,默认找/WEB-INF/<servlet-name>-servlet.xml --> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:springmvc.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> <async-supported>true</async-supported> </servlet> <servlet-mapping> <servlet-name>springmvc</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
4，配置Tomcat并启动项目
4.1，Edit Configurations配置Tomcat
4.2，把applicationContext.xml里的配置先注释，然后选择配置好的tomcat服务器后启动tomcat，先验证下前端配置页面是否通了
4.3，浏览器输入访问地址，输出Hello World！就代表OK了
5，前端OK了，开始写后端代码
5.1，数据库建个表并插入一条记录
DROP TABLE IF EXISTS `user`; CREATE TABLE `user` ( `id` int(11) NOT NULL AUTO_INCREMENT COMMENT '用户ID', `email` varchar(255) NOT NULL COMMENT '用户邮箱', `username` varchar(255) NOT NULL COMMENT '用户昵称', `role` varchar(255) NOT NULL COMMENT '用户身份', `mobile` varchar(50) DEFAULT '' COMMENT '手机号码', PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8; -- ---------------------------- -- Records of user -- ---------------------------- INSERT INTO `user` VALUES ('1', 'test@qq.com', 'test', 'root', '9527');
5.2，与表对应的实体类User
package com.ssm.pojo; public class User { private Integer id;//用户ID private String email;//用户邮箱 private String username;//用户昵称 private String role;//用户身份 private String mobile;//手机号码 public User() { } public User(Integer id, String email, String username, String role, String mobile) { this.id = id; this.email = email; this.username = username; this.role = role; this.mobile = mobile; } @Override public String toString() { return "User{" + "id=" + id + ", email='" + email + '\'' + ", username='" + username + '\'' + ", role='" + role + '\'' + ", mobile='" + mobile + '\'' + '}'; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getEmail() { return email; } public void setEmail(String email) { this.email = email; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getRole() { return role; } public void setRole(String role) { this.role = role; } public String getMobile() { return mobile; } public void setMobile(String mobile) { this.mobile = mobile; } }
5.3，dao层的UserMapper接口
package com.ssm.dao; import com.ssm.pojo.User; public interface UserMapper { User selectUser(int id); }
5.4，service层的UserService接口
package com.ssm.service; import com.ssm.pojo.User; public interface UserService { User selectUser(int id); }
5.5，service.impl下的UserServiceImpl实现类
package com.ssm.service.impl; import com.ssm.dao.UserMapper; import com.ssm.pojo.User; import com.ssm.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; @Service public class UserServiceImpl implements UserService{ @Autowired private UserMapper userMapper; @Override public User selectUser(int id) { return userMapper.selectUser(id); } }
5.6，resources目录下mapper下的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"> <!-- 设置为IUserDao接口方法提供sql语句配置 --> <mapper namespace="com.ssm.dao.UserMapper"> <select id="selectUser" resultType="User" parameterType="int"> SELECT * FROM `user` WHERE id = #{id} </select> </mapper>
5.7，修改一点index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %> <html> <body> <h2>Hello World!</h2> <hr/> <form action="/ssm_demo/user/select" method="get"> 请输入用户id：<input type="text" name="id"/> <input type="submit" value="查询"/> </form> </body> </html>
5.8，controller层的UserController
package com.ssm.controller; import com.ssm.pojo.User; import com.ssm.service.UserService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.servlet.ModelAndView; @Controller @RequestMapping("/user") public class UserController { @Autowired private UserService userService; @RequestMapping("/select") @ResponseBody public ModelAndView selectUser(@RequestParam("id") Integer id) throws Exception { ModelAndView mav = new ModelAndView(); User user = userService.selectUser(id); mav.addObject("user", user); mav.setViewName("user"); return mav; } }
5.9，访问项目首页，输入1，查询
查出结果~
