ssm ----- idea搭建 ssm

demo 下载链接：https://pan.baidu.com/s/1YdD2ojdAIYl7xwc6zqLC1w 密码：57y8

一、准备工作
1、mysql 创建 ssm_demo 数据库
2、创建 user 表
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idea 创建maven 项目（不用教了吧）
创建如下目录结构
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pom.xml

<?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>cn.ws</groupId>
    <artifactId>ssm_demo</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>war</packaging>


    <name>ssm_demo Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <properties>
        <!-- 设置项目编码编码 -->
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <!-- spring版本号 -->
        <spring.version>4.3.5.RELEASE</spring.version>
        <!-- mybatis版本号 -->
        <mybatis.version>3.4.1</mybatis.version>
    </properties>

    <dependencies>
        <!-- java ee -->
        <dependency>
            <groupId>javax</groupId>
            <artifactId>javaee-api</artifactId>
            <version>7.0</version>
        </dependency>

        <!-- 单元测试 -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
        </dependency>

        <!-- 实现slf4j接口并整合 -->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.2</version>
        </dependency>

        <!-- JSON -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.7</version>
        </dependency>


        <!-- 数据库 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.41</version>
            <scope>runtime</scope>
        </dependency>

        <!-- 数据库连接池 -->
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.2</version>
        </dependency>

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

        <!-- mybatis/spring整合包 -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>

        <!-- Spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${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>

    </dependencies>

    <build>
        <finalName>ssm_demo</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <!-- 设置JDK版本 -->
                    <source>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>

            <!-- mybatis逆向工程插件 -->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <!--配置文件的位置-->
                    <configurationFile>src\main\resources\mybatis-generator.xml</configurationFile>
                    <verbose>true</verbose>
                    <overwrite>true</overwrite>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

logback.xml

<?xml version="1.0" encoding="UTF-8"?>
<configuration debug="true">
    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
        <encoder>
            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
        </encoder>
    </appender>
    <root level="debug">
        <appender-ref ref="STDOUT"/>
    </root>
</configuration>

jdbc.properties 输入自己的账号密码

jdbc.driver=com.mysql.jdbc.Driver
#数据库地址
jdbc.url=jdbc:mysql://localhost:3306/ssm_demo?autoReconnect=true&useUnicode=true&characterEncoding=utf8
#用户名
jdbc.username=root
#密码
jdbc.password=sweet
#最大连接数
c3p0.maxPoolSize=30
#最小连接数
c3p0.minPoolSize=10
#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

spring-mvc.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web相关的bean -->
    <context:component-scan base-package="ws.lyao.controller"/>

    <!-- 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jsp 显示ViewResolver -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/views/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

spring-mybatis.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">

    <!-- 扫描service包下所有使用注解的类型 -->
    <context:component-scan base-package="ws.lyao.service"/>

    <!-- 配置数据库相关参数properties的属性：${url} -->
    <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对象 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- 扫描model包 使用别名 -->
        <property name="typeAliasesPackage" value="ws.lyao.model"/>
        <!-- 扫描sql配置文件:mapper需要的xml文件 -->
        <property name="mapperLocations" value="classpath:ws/lyao/mapper/*.xml"/>
    </bean>

    <!-- 配置扫描Dao接口包，动态实现Dao接口，注入到spring容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 注入sqlSessionFactory -->
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        <!-- 给出需要扫描Dao接口包 -->
        <property name="basePackage" value="ws.lyao.mapper"/>
    </bean>

    <!-- 配置事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!-- 注入数据库连接池 -->
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- 配置基于注解的声明式事务 -->
    <tx:annotation-driven transaction-manager="transactionManager"/>
</beans>

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<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>ssm_demo</display-name>
    <description>ssm_demo_Alpha_0.0.1</description>

    <!-- 编码过滤器 -->
    <filter>
        <filter-name>encodingFilter</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>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <!-- 配置DispatcherServlet -->
    <servlet>
        <servlet-name>SpringMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 配置springMVC需要加载的配置文件-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-*.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>
        <!-- 匹配所有请求，此处也可以配置成 *.do 形式 -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
    </welcome-file-list>
</web-app>

接下来先配置 mybatis 逆向工程
注意看pom.xml 最后的逆向配置，配置文件更改为自己的驱动 jar包
jar下载链接：https://pan.baidu.com/s/1U_eSIFiWGfNfuO9dHrUCrA 密码：vr12

mybatis-generator.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE generatorConfiguration PUBLIC
"-//mybatis.org//DTD MyBatis Generator Configuration
1.0//EN"
"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd"
>
<generatorConfiguration>
	<!-- 制定oracle 的驱动包的路径 千万别放中文路径下 -->
	<!--<classPathEntry location="D:\java\ep\ojdbc14-10.2.0.2.0.jar" />
	-->
	<!-- 制定mybatis 的驱动包的路径 千万别放中文路径下 -->
	<classPathEntry location="D:\java\ep\mysql-connector-java-5.0.8-bin.jar" />

	<!-- 配置数据源和生成的代码所存放的位置 -->
	<context id="context1">
		<commentGenerator>
			<!-- 是否去除自动生成的注释 true：是 ： false:否 -->
			<property name="suppressAllComments" value="true" />
		</commentGenerator>

		<!-- oracle -->
		<!--<jdbcConnection driverClass="oracle.jdbc.OracleDriver" connectionURL="jdbc:oracle:thin:@127.0.0.1:1521:orcl" userId="sweet2" password="sweet2" />
		-->
		<!-- mysql -->
		<jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/ssm_demo?characterEncoding=utf-8" userId="root" password="sweet"/>

		<!-- 所生成的实体类的位置默认资源包src -->
		<javaModelGenerator targetPackage="ws.lyao.model" targetProject="src/main/java" />
		<!-- 所生成的sqlMap的影射文件的位置,默认资源包src -->
		<sqlMapGenerator targetPackage="ws.lyao.mapper" targetProject="src/main/resources" />

		<!-- 为哪些表生成代码 tableName:表名 schema:不用填写 -->
		<table schema="" tableName="user" enableCountByExample="false"
			enableUpdateByExample="false" enableDeleteByExample="false"
			enableSelectByExample="false" selectByExampleQueryId="false">
		</table>
	</context>
</generatorConfiguration>

添加逆向运行功能，和 tomcat 配置一样点 + 号选择maven

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双击运行，获得 User.java 和 UserMapper.xml 文件
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编写dao层我这里包是mapper
这里不需要 impl ，不需要注解，spring扫描读取，方法名和mapper.xml 的sql 的 id 对应

public interface UserMapper {

    public User selectByPrimaryKey(Integer id);
}

这里就不写service 层了，大家都会的，直接调dao层，
编写测试类，运行，获得数据

import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import ws.lyao.mapper.UserMapper;
import ws.lyao.model.User;


/**
 * Created by Administrator on 2018/11/17/017.
 */
// 加载spring配置文件
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration({"classpath:spring-mybatis.xml"})
public class Test {

    @Autowired
    private UserMapper userMapper;

    @org.junit.Test
    public void selectId(){
        User user = userMapper.selectByPrimaryKey(1);
        System.out.println(user.toString());
    }
}

数据层就ok了，接下来看 index.html

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>test</title></head>
<script>
    function selectUser() {
        var xmlhttp = new XMLHttpRequest();
        xmlhttp.onreadystatechange = function () {
            if (xmlhttp.readyState == 4 && xmlhttp.status == 200) {
                document.getElementById("test").innerHTML = xmlhttp.responseText;
            }
        }
        xmlhttp.open("POST", "user/showUser.do", true);
        xmlhttp.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
        xmlhttp.send("id=1");
    }</script>
<body><p id="test">Hello World!</p>
<button type="button" onclick="selectUser()">onclick test</button>
</body>
</html>

编写 controller 层

@Controller
@RequestMapping("/user")
public class UserController {

        @Resource
        private UserMapper userMapper;

        @RequestMapping("/showUser.do")
        public void selectUser(HttpServletRequest request, HttpServletResponse response) throws IOException {
            request.setCharacterEncoding("UTF-8");
            response.setCharacterEncoding("UTF-8");
           // long userId = Long.parseLong(request.getParameter("id"));
            User user = this.userMapper.selectByPrimaryKey(1);
            ObjectMapper mapper = new ObjectMapper();
            response.getWriter().write(mapper.writeValueAsString(user));
            response.getWriter().close();
        }
}

然后配置tomcat 运行吧
点击测试，会获得id = 1 的数据
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获得数据
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ssm ----- idea搭建 ssm

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