SSM整合（Spring+Spring MVC +Mybatis）

最近一直在學習Spring相關，於是乎就想整合下SSM，原以為整合的過程是相當的順利，結果並不是那么的順利，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.SQLServerDriver
jdbc.url=jdbc:sqlserver://localhost:1433;DatabaseName=model
jdbc.username=sa
jdbc.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 configuration
log4j.rootLogger=DEBUG, stdout
# MyBatis logging configuration...
log4j.logger.mybatis.mybatisDemo=TRACE
# 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


#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 = ALL
log4j.appender.File.layout = org.apache.log4j.PatternLayout
log4j.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：

1. 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>
    <!--對於注解的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="multipartResolver"
          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;


@Controller
public 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";
    }
}

4.3.3、最后部署一下即可

至此所有的整合已完成！！！