SSM框架整合(Spring+SpringMVC+Mybatis)

第一步：创建maven项目并完善项目结构

 第二步：相关配置

pom.xml

引入相关jar包

  1 <properties>
  2   <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  3   <maven.compiler.source>1.7</maven.compiler.source>
  4   <maven.compiler.target>1.7</maven.compiler.target>
  5   <spring.version>5.0.2.RELEASE</spring.version>
  6   <slf4j.version>1.6.6</slf4j.version>
  7   <log4j.version>1.2.12</log4j.version>
  8   <mysql.version>5.1.6</mysql.version>
  9   <mybatis.version>3.4.5</mybatis.version>
 10 </properties>
 11
 12 <dependencies>
 13   <!-- spring -->
 14   <dependency>
 15     <groupId>org.aspectj</groupId>
 16     <artifactId>aspectjweaver</artifactId>
 17     <version>1.6.8</version>
 18   </dependency>
 19   <dependency>
 20     <groupId>org.springframework</groupId>
 21     <artifactId>spring-aop</artifactId>
 22     <version>${spring.version}</version>
 23   </dependency>
 24   <dependency>
 25     <groupId>org.springframework</groupId>
 26     <artifactId>spring-context</artifactId>
 27     <version>${spring.version}</version>
 28   </dependency>
 29   <dependency>
 30     <groupId>org.springframework</groupId>
 31     <artifactId>spring-web</artifactId>
 32     <version>${spring.version}</version>
 33   </dependency>
 34   <dependency>
 35     <groupId>org.springframework</groupId>
 36     <artifactId>spring-webmvc</artifactId>
 37     <version>${spring.version}</version>
 38   </dependency>
 39   <dependency>
 40     <groupId>org.springframework</groupId>
 41     <artifactId>spring-test</artifactId>
 42     <version>${spring.version}</version>
 43   </dependency>
 44   <dependency>
 45     <groupId>org.springframework</groupId>
 46     <artifactId>spring-tx</artifactId>
 47     <version>${spring.version}</version>
 48   </dependency>
 49   <dependency>
 50     <groupId>org.springframework</groupId>
 51     <artifactId>spring-jdbc</artifactId>
 52     <version>${spring.version}</version>
 53   </dependency>
 54   <dependency>
 55     <groupId>junit</groupId>
 56     <artifactId>junit</artifactId>
 57     <version>4.12</version><scope>compile</scope>
 58   </dependency>
 59   <dependency>
 60     <groupId>mysql</groupId>
 61     <artifactId>mysql-connector-java</artifactId>
 62     <version>${mysql.version}</version>
 63   </dependency>
 64   <dependency>
 65     <groupId>javax.servlet</groupId>
 66     <artifactId>servlet-api</artifactId>
 67     <version>2.5</version>
 68     <scope>provided</scope>
 69   </dependency>
 70   <dependency>
 71     <groupId>javax.servlet.jsp</groupId>
 72     <artifactId>jsp-api</artifactId>
 73     <version>2.0</version>
 74     <scope>provided</scope>
 75   </dependency>
 76   <dependency>
 77     <groupId>jstl</groupId>
 78     <artifactId>jstl</artifactId>
 79     <version>1.2</version>
 80   </dependency>
 81   <!-- log start -->
 82   <dependency>
 83     <groupId>log4j</groupId>
 84     <artifactId>log4j</artifactId>
 85     <version>${log4j.version}</version>
 86   </dependency>
 87   <dependency>
 88     <groupId>org.slf4j</groupId>
 89     <artifactId>slf4j-api</artifactId>
 90     <version>${slf4j.version}</version>
 91   </dependency>
 92   <dependency>
 93     <groupId>org.slf4j</groupId>
 94     <artifactId>slf4j-log4j12</artifactId>
 95     <version>${slf4j.version}</version>
 96   </dependency>
 97   <!-- log end -->
 98   <dependency>
 99     <groupId>org.mybatis</groupId>
100     <artifactId>mybatis</artifactId>
101     <version>${mybatis.version}</version>
102   </dependency><dependency>
103   <groupId>org.mybatis</groupId>
104   <artifactId>mybatis-spring</artifactId>
105   <version>1.3.0</version>
106 </dependency>
107   <!--这里选择哪种链接池自己决定 我是用的durid-->
108   <dependency>
109     <groupId>com.alibaba</groupId>
110     <artifactId>druid</artifactId>
111     <version>1.0.9</version>
112   </dependency>
113 </dependencies>
114 配置编译java路径下的xml文件（当mybatis采用mapper.xml形式编写sql语句的时候，放在dao层下的xml文件maven默认是不编译的）
115 在build标签里加入以下代码
116
117 <resources>
118  <!--编译src/main/java目录下的xml文件-->
119   <resource>
120     <directory>src/main/java</directory>
121     <includes>
122       <include>**/*.xml</include>
123     </includes>
124     <filtering>true</filtering>
125   </resource>
126 </resources>

到此为止pom.xml就配置好了

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接下来我们配置mybatis的配置文件
SqlMapConfig.xml（因为我们后面要整合Spring所以很多配置都放在了Spring配置文件里面 这里我们只配置一下别名方便以后mapper.xml的编写）

<?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>
    <!--配置别名-->
    <typeAliases>
         <!--domain包路径>
         <package name="cn.jydm.domain"></package>
    </typeAliases>
</configuration>

jdbc.properties（这里主要填写一下数据库的相关数据 我只填写了必要的数据 链接限制等自己根据情况填写)

driverClass=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/数据库名?useUnicode=true&characterEncoding=utf8
user=root  （这里说明一下之所以没有填username 是因为在Spring配置文件里面编写${username} 会获取到主机名字 导致连接数据库失败）
password=密码
到这数据库的相关东西都编写好了
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SpringMVC的配置
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">
    <!-- 配置spring创建容器时要扫描的包 -->
    <context:component-scan base-package="cn.jydm.contraller" /> 
    <!-- 配置视图解析器 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/pages/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
    <!-- 配置spring开启注解mvc的支持-->
    <mvc:annotation-driven></mvc:annotation-driven>
</beans>

---------------------------------------------------------------------------------------------------------------------------------------
接下来我们配置一下spring的配置文件（因为无论是SpringMVC还是Mybatis都是与Spring整合所以我们最后配置Spring）
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.xsd
   http://www.springframework.org/schema/context
   http://www.springframework.org/schema/context/spring-context.xsd
   http://www.springframework.org/schema/aop
   http://www.springframework.org/schema/aop/spring-aop.xsd
   http://www.springframework.org/schema/tx
   http://www.springframework.org/schema/tx/spring-tx.xsd">

<!--引入jdbc配置文件-->
 <context:property-placeholder location="classpath:jdbc.properties"></context:property-placeholder>

  <!--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="cn.jydm" >
        <!--配置哪些注解不扫描-->
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller" />
    </context:component-scan>
    <!--spring整合mybatis框架-->
    <!-- 配置Durid的连接池对象 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init"
          destroy-method="close">
        <property name="driverClassName" value="${driverClass}" />
        <property name="url" value="${url}" />
        <property name="username" value="${user}" />
        <property name="password" value="${password}" />
    </bean>
    <!-- 配置SqlSession的工厂 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!--指定mapper的配置文件-->
        <property name="configLocation" value="classpath:SqlMapConfig.xml" />
         <!--指定mapper文件的存放路径-->
        <property name="mapperLocations" value="classpath:cn/jydm/dao/*.xml"/>
    </bean>
    <!-- 配置扫描dao的包 -->
    <bean id="mapperScanner" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
    <property name="basePackage" value="cn.jydm.dao"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>
</beans>
这样所有的配置文件就都写好了SSM框架也就整合完毕了
最后还有一个日志文件
log4j.properties

# 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

在整合过程中出现了tomcat启动失败的问题，后来发现是配置别名的时候包路径没有写对 导致mapper.xml里的返回值类型出现了找不到的问题。