SSM整合（Spring+SpringMVC+Mybatis）

2019-11-14 14:58:10

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最近一直在學習SPRing相關，于是乎就想整合下SSM，原以為整合的過程是相當的順利，結果并不是那么的順利，搜了很多資料，最后還是大Google幫忙了，好了，廢話不多說了，開始整合：

1、Maven創建Web項目

2、結構如下，其中的dao、mapping、pojo包中的類、接口、配置文件可以用mabatis generator自動生成；controller包可以先不管，

pom.xml文件如下：

<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/maven-v4_0_0.xsd"><modelVersion>4.0.0</modelVersion><groupId>cn.spring</groupId><artifactId>spring</artifactId><packaging>war</packaging><version>1.0-SNAPSHOT</version><name>spring Maven Webapp</name><url>http://maven.apache.org</url><dependencies><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>3.2.15.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>3.2.15.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context-support</artifactId><version>3.2.15.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-aop</artifactId><version>3.2.15.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-beans</artifactId><version>3.2.15.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-expression</artifactId><version>3.2.15.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>3.2.15.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-web</artifactId><version>3.2.15.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-dao</artifactId><version>2.0.8</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>3.2.15.RELEASE</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.0.16</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis-spring</artifactId><version>1.2.1</version></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version></dependency><dependency><groupId>org.mybatis</groupId><artifactId>mybatis</artifactId><version>3.2.3</version></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version></dependency><dependency><groupId>commons-logging</groupId><artifactId>commons-logging</artifactId><version>1.2</version></dependency><dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.3.1</version></dependency><dependency><groupId>commons-io</groupId><artifactId>commons-io</artifactId><version>2.4</version></dependency><!-- 導入dbcp的jar包，用來在applicationContext.xml中配置數據庫 --><dependency><groupId>commons-dbcp</groupId><artifactId>commons-dbcp</artifactId><version>1.2.2</version></dependency><!-- 格式化對象，方便輸出日志 --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.1.41</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>1.7.13</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>1.7.13</version></dependency><!-- 映入JSON --><dependency><groupId>org.codehaus.jackson</groupId><artifactId>jackson-mapper-asl</artifactId><version>1.9.13</version></dependency></dependencies><build><finalName>spring</finalName><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><configuration><source>1.6</source><target>1.6</target></configuration></plugin></plugins><resources><resource><directory>src/main/java</directory><includes><include>**/*.xml</include></includes><!-- 是否替換資源中的屬性--><filtering>false</filtering></resource></resources></build></project>

最后的resources得說下，之前一直沒在pom.xml中加入Mybatis generator自動生成的xml文件，導致一直報下圖的錯誤，被這個錯誤困擾了很久，最后才明白原來maven在打包的時候xml是不打包的(如果一直出現這個錯誤的童鞋，可以看下你們的classes是否有mapper.xml)

3、Spring與Mabatis整合

所有的jar包都導入后，就可以開始spring和mybatis整合了，配置文件如下圖的紅色框部分

3.1、建立jdbc屬性文件

dbssm.properties本人用的sqlserver

jdbc.driver=com.microsoft.sqlserver.jdbc.SQLServerDriverjdbc.url=jdbc:sqlserver://localhost:1433;DatabaseName=modeljdbc.username=sajdbc.passWord=starlin.cn#定義初始連接數initialSize=0#定義最大連接數maxActive=20#定義最大空閑maxIdle=20#定義最小空閑minIdle=1#定義最長等待時間maxWait=60000

3.2 建立spring-mybatis.xml文件

這個文件不用多說吧

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:tx="http://www.springframework.org/schema/tx"       xmlns:aop="http://www.springframework.org/schema/aop"       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-3.1.xsd                       http://www.springframework.org/schema/aop                       http://www.springframework.org/schema/aop/spring-aop-3.1.xsd                       http://www.springframework.org/schema/context                       http://www.springframework.org/schema/context/spring-context.xsd"><!-- 自動掃描 -->    <context:component-scan base-package="cn" />    <!-- 引入配置文件 -->    <bean id="propertyConfigurer"          class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">        <property name="location" value="classpath:ssm/dbssm.properties" />    </bean>    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"          destroy-method="close">        <property name="driverClassName" value="${jdbc.driver}" />        <property name="url" value="${jdbc.url}" />        <property name="username" value="${jdbc.username}" />        <property name="password" value="${jdbc.password}" />        <!-- 初始化連接大小 -->        <property name="initialSize" value="${initialSize}"></property>        <!-- 連接池最大數量 -->        <property name="maxActive" value="${maxActive}"></property>        <!-- 連接池最大空閑 -->        <property name="maxIdle" value="${maxIdle}"></property>        <!-- 連接池最小空閑 -->        <property name="minIdle" value="${minIdle}"></property>        <!-- 獲取連接最大等待時間 -->        <property name="maxWait" value="${maxWait}"></property>    </bean>    <!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->    <bean id="sqlsessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">        <property name="dataSource" ref="dataSource" />        <!-- 自動掃描mapping.xml文件 -->        <property name="mapperLocations" value="classpath:cn/mapping/*.xml"></property>    </bean>    <!-- DAO接口所在包名，Spring會自動查找其下的類 -->    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">        <property name="basePackage" value="cn.dao" />        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>    </bean>    <!-- (事務管理)transaction manager, use JtaTransactionManager for global tx -->    <bean id="transactionManager"          class="org.springframework.jdbc.datasource.DataSourceTransactionManager">        <property name="dataSource" ref="dataSource" />    </bean></beans>

3.3、log4j的配置

Log4j.properties配置很簡單

# Global logging configurationlog4j.rootLogger=DEBUG, stdout# MyBatis logging configuration...log4j.logger.mybatis.mybatisDemo=TRACE# Console output...log4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n#文件大小到達指定尺寸的時候產生一個新的文件log4j.appender.File = org.apache.log4j.RollingFileAppender#指定輸出目錄log4j.appender.File.File = logs/ssm.log#定義文件最大大小log4j.appender.File.MaxFileSize = 10MB# 輸出所以日志，如果換成DEBUG表示輸出DEBUG以上級別日志log4j.appender.File.Threshold = ALLlog4j.appender.File.layout = org.apache.log4j.PatternLayoutlog4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-dd HH/:mm/:ss}][%c]%m%n

3.4、junit測試

經過上面的配置，基本就已完成了spring和mybaits的配置了，就可以寫測試類了

當然是寫service和serviceImpl實現類

IEmpService.java

ppackage cn.service;import cn.pojo.Emp;public interface IEmpService {    public Emp findById(String id) ;}

EmpServiceImpl.java

package cn.service.impl;import cn.dao.EmpDao;import cn.pojo.Emp;import cn.service.IEmpService;import org.springframework.stereotype.Service;import javax.annotation.Resource;@Service("userService")public class EmpServiceImpl implements IEmpService {    @Resource()    private EmpDao empDao;    @Override    public Emp findById(String id) {        return empDao.findById(id);    }}

測試類TestMyBatis

package test.mybatis;import cn.pojo.Emp;import cn.service.IEmpService;import com.alibaba.fastjson.JSON;import org.apache.log4j.Logger;import org.junit.Before;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import javax.annotation.Resource;@RunWith(SpringJUnit4ClassRunner.class) //表示繼承了SpringJUnit4ClassRunner類@ContextConfiguration(locations = {"classpath:ssm/spring-mybatis.xml"})public class TestMyBatis {    private static Logger logger = Logger.getLogger(TestMyBatis.class);    private ApplicationContext applicationContext = null;    @Resource    private IEmpService iEmpService;    @Before    public void before(){        applicationContext = new ClassPathXmlApplicationContext();    }    @Test    public void test(){        Emp user = iEmpService.findById("8888");        logger.info(JSON.toJSONString(user));    }}

如果測試一直不通過的，請看我前面的說明檢查resources，鄙人就是在那里卡了很久了，測試一直無法通過,耽誤了很多時間.

測試結果：

整合SpringMVC
上面的整合完成了，基本上就是完成了一大步了，整合springmvc就很簡單了

4.1、配置spring-mvc.xml

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-3.2.xsd        http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd"><!--配置Handler-->    <!--視圖解析器,因為是使用的jsp，所以要配置jsp的視圖解析器-->    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>        <property name="prefix" value="/WEB-INF/springmvc/"/> <!--前綴-->        <property name="suffix" value=".jsp"/><!--后綴-->    </bean>    <!--注解的適配器-->    <!--<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"></bean>-->    <!--&lt;!&ndash;注解的映射器&ndash;&gt;-->    <!--<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"></bean>-->    <!--使用mvc的注解驅動代替上面的注解適配器和映射器,實際開發使用此種方式-->    <mvc:annotation-driven></mvc:annotation-driven>    <!--對于注解的handle可以單個配置，實際開發中使用組件掃描-->    <context:component-scan base-package="cn"></context:component-scan>    <!--避免IE執行Ajax時，返回JSON出現下載文件 -->    <bean id="mappingJacksonHttpMessageConverter"          class="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter">        <property name="supportedMediaTypes">            <list>                <value>text/html;charset=UTF-8</value>            </list>        </property>    </bean>    <!--文件上傳設定，需要導入相關的包commons-fileupload、commons-io-->    <!-- 配置文件上傳，如果沒有使用文件上傳可以不用配置，當然如果不配，那么配置文件中也不必引入上傳組件包 -->    <bean id="mult          class="org.springframework.web.multipart.commons.CommonsMultipartResolver">        <!-- 默認編碼 -->        <property name="defaultEncoding" value="utf-8" />        <!-- 文件大小最大值 -->        <property name="maxUploadSize" value="10485760000" />        <!-- 內存中的最大值 -->        <property name="maxInMemorySize" value="40960" />    </bean></beans>

4.2、配置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>Archetype Created Web Application</display-name>  <!-- Spring和mybatis的配置文件 -->  <context-param>    <param-name>contextConfigLocation</param-name>    <param-value>classpath:ssm/spring-mybatis.xml</param-value>  </context-param>  <!-- 編碼過濾器 -->  <filter>    <filter-name>encodingFilter</filter-name>    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>    <async-supported>true</async-supported>    <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>  <!-- Spring監聽器 -->  <listener>    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>  </listener>  <!-- 防止Spring內存溢出監聽器 -->  <listener>    <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>  </listener> <servlet>    <servlet-name>ssm</servlet-name>    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>    <init-param>      <!--contextConfigLocation配置springMvc加載的配置文件（配置處理器，映射器，適配器等等）-->      <param-name>contextConfigLocation</param-name>      <param-value>classpath:ssm/spring-mvc.xml</param-value>      <!--如果不配置contextConfigLocation，默認加載/WEB-INF/servlet名稱-servlet.xml(springmvc-servlet.xml)-->    </init-param>  </servlet>  <servlet-mapping>    <servlet-name>ssm</servlet-name>    <!--第一種方式：*.action訪問，.action結尾由DispatcherServlet解析-->    <!--第二種方式：/,所有訪問的地址都有DispatcherServlet解析-->    <url-pattern>/</url-pattern>  </servlet-mapping></web-app>

4.3、測試

至此，都已經整合了，在測試了的時候還是發現了很多錯誤，比如測試的時候maven中少了spring-dao.jar包導致測試無法通過，遇到錯誤不要怕多google

4.3.1、建立jsp頁面

ShowUser.jsp只輸出一個用戶名

<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head>    <title>showUser</title></head><body>    ${user}</body></html>

4.3.2、建立Controller類

UserController.java

package cn.controller;import cn.pojo.Emp;import cn.service.IEmpService;import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.web.bind.annotation.RequestMapping;import javax.annotation.Resource;import javax.servlet.http.HttpServletRequest;@Controllerpublic class UserController {    @Resource    private IEmpService iEmpService;    @RequestMapping("/showUser")    public String toIndex(HttpServletRequest request, Model model) throws Exception{        Emp user = this.iEmpService.findById("8888");        model.addAttribute("user", user.getEname());        return "showUser";    }}