SSM基礎環境搭建

原創 仁者12138 2019-02-16 21:58

搭建過程：

1、創建一個maven工程

2、引入項目依賴的jar包
  • spring 
  • springmvc 
  • mybatis 
  • 數據庫連接池，驅動包 
  • 其他（jstl，servlet-api，junit） 
3、引入bootstrap前端框架
4、編寫ssm整合的關鍵配置文件
  • web.xml，spring,springmvc,mybatis，使用mybatis的逆向工程生成對應的bean以 及mapper 

5、測試mapper

項目圖片：



pom.xml:

<!--引入項目依賴的jar包 -->
<!-- SpringMVC、Spring -->
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependencies>

    <!--引入pageHelper分頁插件 -->
    <dependency>
        <groupId>com.github.pagehelper</groupId>
        <artifactId>pagehelper</artifactId>
        <version>5.0.0</version>
    </dependency>

    <!-- MBG -->
    <!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
    <dependency>
        <groupId>org.mybatis.generator</groupId>
        <artifactId>mybatis-generator-core</artifactId>
        <version>1.3.5</version>
    </dependency>


    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>4.3.7.RELEASE</version>
    </dependency>

    <!-- 返回json字符串的支持 -->
    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.8.8</version>
    </dependency>

    <!--JSR303數據校驗支持；tomcat7及以上的服務器， 
    tomcat7以下的服務器：el表達式。額外給服務器的lib包中替換新的標準的el
    -->
    <!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>5.4.1.Final</version>
    </dependency>


    <!-- Spring-Jdbc -->
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-jdbc -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>4.3.7.RELEASE</version>
    </dependency>

    <!--Spring-test -->
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-test -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>4.3.7.RELEASE</version>
    </dependency>


    <!-- Spring面向切面編程 -->
    <!-- https://mvnrepository.com/artifact/org.springframework/spring-aspects -->
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aspects</artifactId>
        <version>4.3.7.RELEASE</version>
    </dependency>

    <!--MyBatis -->
    <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis</artifactId>
        <version>3.4.2</version>
    </dependency>
    <!-- MyBatis整合Spring的適配包 -->
    <!-- https://mvnrepository.com/artifact/org.mybatis/mybatis-spring -->
    <dependency>
        <groupId>org.mybatis</groupId>
        <artifactId>mybatis-spring</artifactId>
        <version>1.3.1</version>
    </dependency>

    <!-- 數據庫連接池、驅動 -->
    <!-- https://mvnrepository.com/artifact/c3p0/c3p0 -->
    <dependency>
        <groupId>c3p0</groupId>
        <artifactId>c3p0</artifactId>
        <version>0.9.1</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>5.1.41</version>
    </dependency>
    <!-- （jstl，servlet-api，junit） -->
    <!-- https://mvnrepository.com/artifact/jstl/jstl -->
    <dependency>
        <groupId>jstl</groupId>
        <artifactId>jstl</artifactId>
        <version>1.2</version>
    </dependency>

    <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>3.0.1</version>
        <scope>provided</scope>
    </dependency>


    <!-- junit -->
    <!-- https://mvnrepository.com/artifact/junit/junit -->
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.12</version>
    </dependency>
</dependencies>
web.xml: 

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    id="WebApp_ID" version="2.5">
    <!--1、啓動Spring的容器 -->
    <!-- needed for ContextLoaderListener -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <!-- Bootstraps the root web application context before servlet initialization -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!--2、springmvc的前端控制器，攔截所有請求 -->
    <!-- The front controller of this Spring Web application, responsible for 
        handling all application requests -->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <!-- Map all requests to the DispatcherServlet for handling -->
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    <!-- 3、字符編碼過濾器，一定要放在所有過濾器之前 -->
    <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>forceRequestEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
        <init-param>
            <param-name>forceResponseEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!-- 4、使用Rest風格的URI，將頁面普通的post請求轉爲指定的delete或者put請求 -->
    <filter>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <filter>
        <filter-name>HttpPutFormContentFilter</filter-name>
        <filter-class>org.springframework.web.filter.HttpPutFormContentFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>HttpPutFormContentFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>
dispatcherServlet-servlet.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/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">

    <!--SpringMVC的配置文件，包含網站跳轉邏輯的控制，配置  -->
    <context:component-scan base-package="com.zhou" use-default-filters="false">
        <!--只掃描控制器。  -->
        <context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
    </context:component-scan>

    <!--配置視圖解析器，方便頁面返回  -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/views/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!--兩個標準配置  -->
    <!-- 將springmvc不能處理的請求交給tomcat -->
    <mvc:default-servlet-handler/>
    <!-- 能支持springmvc更高級的一些功能，JSR303校驗，快捷的ajax...映射動態請求 -->
    <mvc:annotation-driven/>

</beans>
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/aop http://www.springframework.org/schema/aop/spring-aop-4.3.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd">

    <context:component-scan base-package="com.zhou">
        <context:exclude-filter type="annotation"
            expression="org.springframework.stereotype.Controller" />
    </context:component-scan>

    <!-- Spring的配置文件，這裏主要配置和業務邏輯有關的 -->
    <!--=================== 數據源，事務控制，xxx ================-->
    <context:property-placeholder location="classpath:dbconfig.properties" />
    <bean id="pooledDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}"></property>
        <property name="driverClass" value="${jdbc.driverClass}"></property>
        <property name="user" value="${jdbc.user}"></property>
        <property name="password" value="${jdbc.password}"></property>
    </bean>

    <!--================== 配置和MyBatis的整合=============== -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 指定mybatis全局配置文件的位置 -->
        <property name="configLocation" value="classpath:mybatis-config.xml"></property>
        <property name="dataSource" ref="pooledDataSource"></property>
        <!-- 指定mybatis，mapper文件的位置 -->
        <property name="mapperLocations" value="classpath:mapper/*.xml"></property>
    </bean>

    <!-- 配置掃描器，將mybatis接口的實現加入到ioc容器中 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!--掃描所有dao接口的實現，加入到ioc容器中 -->
        <property name="basePackage" value="com.zhou.dao"></property>
    </bean>

    <!-- 配置一個可以執行批量的sqlSession -->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory"></constructor-arg>
        <constructor-arg name="executorType" value="BATCH"></constructor-arg>
    </bean>
    <!--=============================================  -->

    <!-- ===============事務控制的配置 ================-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--控制住數據源  -->
        <property name="dataSource" ref="pooledDataSource"></property>
    </bean>
    <!--開啓基於註解的事務，使用xml配置形式的事務（必要主要的都是使用配置式）  -->
    <aop:config>
        <!-- 切入點表達式 -->
        <aop:pointcut expression="execution(* com.zhou.service..*(..))" id="txPoint"/>
        <!-- 配置事務增強 -->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPoint"/>
    </aop:config>

    <!--配置事務增強，事務如何切入  -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager">
        <tx:attributes>
            <!-- 所有方法都是事務方法 -->
            <tx:method name="*"/>
            <!--以get開始的所有方法  -->
            <tx:method name="get*" read-only="true"/>
        </tx:attributes>
    </tx:advice>

    <!-- Spring配置文件的核心點（數據源、與mybatis的整合，事務控制） -->

</beans>
dbconfig.properties:
jdbc.jdbcUrl=jdbc:mysql://localhost:3306/ssm_crud
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.user=root
jdbc.password=123456
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>
        <setting name="mapUnderscoreToCamelCase" value="true"/>
    </settings>

    <typeAliases>
        <package name="com.zhou.bean"/>
    </typeAliases>

    <plugins>
        <plugin interceptor="com.github.pagehelper.PageInterceptor">
            <!--分頁參數合理化  -->
            <property name="reasonable" value="true"/>
        </plugin>
    </plugins>

</configuration>

MyBatis逆向工程:

1.pom.xml:
<!-- MBG -->
<!-- https://mvnrepository.com/artifact/org.mybatis.generator/mybatis-generator-core -->
<dependency>
    <groupId>org.mybatis.generator</groupId>
    <artifactId>mybatis-generator-core</artifactId>
    <version>1.3.5</version>
</dependency>
2.ssm_crud.sql:
DROP TABLE IF EXISTS `tbl_dept`;
CREATE TABLE `tbl_dept` (
  `dept_id` int(11) NOT NULL AUTO_INCREMENT,
  `dept_name` varchar(255) NOT NULL,
  PRIMARY KEY (`dept_id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of tbl_dept
-- ----------------------------

INSERT INTO `tbl_dept` VALUES ('1', '開發部');
INSERT INTO `tbl_dept` VALUES ('2', '測試部');

-- ----------------------------
-- Table structure for tbl_emp
-- ----------------------------
DROP TABLE IF EXISTS `tbl_emp`;
CREATE TABLE `tbl_emp` (
  `emp_id` int(11) NOT NULL AUTO_INCREMENT,
  `emp_name` varchar(255) NOT NULL,
  `gender` char(1) DEFAULT NULL,
  `email` varchar(255) DEFAULT NULL,
  `d_id` int(11) DEFAULT NULL,
  PRIMARY KEY (`emp_id`),
  KEY `d_id` (`d_id`),
  CONSTRAINT `tbl_emp_ibfk_1` FOREIGN KEY (`d_id`) REFERENCES `tbl_dept` (`dept_id`)
) ENGINE=InnoDB AUTO_INCREMENT=22 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of tbl_emp
-- ----------------------------
INSERT INTO `tbl_emp` VALUES ('1', 'Jerry', 'M', '[email protected]', '1');
INSERT INTO `tbl_emp` VALUES ('2', 'Jerry', 'M', '[email protected]', '1');
3.mbg.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>
    <context id="DB2Tables" targetRuntime="MyBatis3">
        <!-- 生成沒有註釋的代碼 -->
        <commentGenerator>
            <property name="suppressAllComments" value="true" />
        </commentGenerator>
        <!-- 配置數據庫連接 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver"
            connectionURL="jdbc:mysql://localhost:3306/ssm_crud" userId="root"
            password="123456">
        </jdbcConnection>
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>
        <!-- 指定javaBean生成的位置 -->
        <javaModelGenerator targetPackage="com.zhou.bean"
            targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>
        <!--指定sql映射文件生成的位置 -->
        <sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>
        <!-- 指定dao接口生成的位置，mapper接口 -->
        <javaClientGenerator type="XMLMAPPER"
            targetPackage="com.zhou.dao" targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>
        <!-- table指定每個表的生成策略 -->
        <table tableName="tbl_emp" domainObjectName="Employee"></table>
        <table tableName="tbl_dept" domainObjectName="Department"></table>
    </context>
</generatorConfiguration>
4.MBGTest.java—運行生成代碼:
public class MBGTest {

    public static void main(String[] args) throws Exception {
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        File configFile = new File("mbg.xml");
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(configFile);
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config,
                callback, warnings);
        myBatisGenerator.generate(null);
    }
}
5.對生成的逆向工程代碼進行相應的修改:
1.EmployeeMapper.java中添加:
List<Employee> selectByExampleWithDept(EmployeeExample example);
Employee selectByPrimaryKeyWithDept(Integer empId);
2.EmployeeMapper.xml中添加:
<!-- 查詢員工同時帶部門信息 -->
<select id="selectByExampleWithDept" resultMap="WithDeptResultMap">
    select
    <if test="distinct">
        distinct
    </if>
    <include refid="WithDept_Column_List" />
    FROM tbl_emp e
    left join tbl_dept d on e.`d_id`=d.`dept_id`
    <if test="_parameter != null">
        <include refid="Example_Where_Clause" />
    </if>
    <if test="orderByClause != null">
        order by ${orderByClause}
    </if>
</select>

<sql id="WithDept_Column_List">
    e.emp_id, e.emp_name, e.gender, e.email, e.d_id,d.dept_id,d.dept_name
</sql>

<select id="selectByPrimaryKeyWithDept" resultMap="WithDeptResultMap">
    select
    <include refid="WithDept_Column_List" />
    FROM tbl_emp e
    left join tbl_dept d on e.`d_id`=d.`dept_id`
    where emp_id = #{empId,jdbcType=INTEGER}
</select>

<resultMap type="com.zhou.bean.Employee" id="WithDeptResultMap">
    <id column="emp_id" jdbcType="INTEGER" property="empId" />
    <result column="emp_name" jdbcType="VARCHAR" property="empName" />
    <result column="gender" jdbcType="CHAR" property="gender" />
    <result column="email" jdbcType="VARCHAR" property="email" />
    <result column="d_id" jdbcType="INTEGER" property="dId" />
    <!-- 指定聯合查詢出的部門字段的封裝 -->
    <association property="department" javaType="com.zhou.bean.Department">
        <id column="dept_id" property="deptId" />
        <result column="dept_name" property="deptName" />
    </association>
</resultMap>
3.Employee.java中添加:
//希望查詢員工的同時部門信息也是查詢好的
private Department department;

public Department getDepartment() {
    return department;
}

public void setDepartment(Department department) {
    this.department = department;
}
測試 Mapper-MapperTest.java:
/**
 * 測試dao層的工作
 * @author lfy
 *推薦Spring的項目就可以使用Spring的單元測試，可以自動注入我們需要的組件
 *1、導入SpringTest模塊
 *2、@ContextConfiguration指定Spring配置文件的位置
 *3、直接autowired要使用的組件即可
 */

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations={"classpath:applicationContext.xml"})
public class MapperTest {

    @Autowired
    DepartmentMapper departmentMapper;

    @Autowired
    EmployeeMapper employeeMapper;

    @Autowired
    SqlSession sqlSession;

    /**
     * 測試DepartmentMapper
     */
    @Test
    public void testCRUD(){
    /*  //1、創建SpringIOC容器
        ApplicationContext ioc = new ClassPathXmlApplicationContext("applicationContext.xml");
        //2、從容器中獲取mapper
        DepartmentMapper bean = ioc.getBean(DepartmentMapper.class);*/
        System.out.println(departmentMapper);

        //1、插入幾個部門
//      departmentMapper.insertSelective(new Department(null, "開發部"));
//      departmentMapper.insertSelective(new Department(null, "測試部"));

        //2、生成員工數據，測試員工插入
        employeeMapper.insertSelective(new Employee(null, "Jerry", "M", "[email protected]", 1));

        //3、批量插入多個員工；批量，使用可以執行批量操作的sqlSession。

//      for(){
//          employeeMapper.insertSelective(new Employee(null, , "M", "[email protected]", 1));
//      }
        EmployeeMapper mapper = sqlSession.getMapper(EmployeeMapper.class);
        for(int i = 0;i<1000;i++){
            String uid = UUID.randomUUID().toString().substring(0,5)+i;
            mapper.insertSelective(new Employee(null,uid, "M", uid+"@zhou.com", 1));
        }
        System.out.println("批量完成");

    }

}
注意事項:
測試Mapper時使用到了有參構造方法，在Employee.java中添加有參構造方法時記得添加無參的構造方法。

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