SSM框架整合之Spring+SpringMVC+MyBatis實踐步驟

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1、基本概念

1.1、Spring

Spring是一個開源框架，Spring是於2003年興起的一個輕量級的Java開發框架，由RodJohnson在其著作ExpertOne-On-OneJ2EEDevelopmentandDesign中闡述的部分理念和原型衍生而來。它是為瞭解決企業應用開發的復雜性而創建的。Spring使用基本的JavaBean來完成以前隻可能由EJB完成的事情。然而，Spring的用途不僅限於服務器端的開發。從簡單性、可測試性和松耦合的角度而言，任何Java應用都可以從Spring中受益。簡單來說，Spring是一個輕量級的控制反轉（IoC）和面向切面（AOP）的容器框架。

1.2、SpringMVC

SpringMVC屬於SpringFrameWork的後續產品，已經融合在SpringWebFlow裡面。SpringMVC分離瞭控制器、模型對象、分派器以及處理程序對象的角色，這種分離讓它們更容易進行定制。

1.3、MyBatis

MyBatis本是apache的一個開源項目iBatis,2010年這個項目由apachesoftwarefoundation遷移到瞭googlecode，並且改名為MyBatis。MyBatis是一個基於Java的持久層框架。iBATIS提供的持久層框架包括SQLMaps和DataAccessObjects（DAO）MyBatis消除瞭幾乎所有的JDBC代碼和參數的手工設置以及結果集的檢索。MyBatis使用簡單的XML或註解用於配置和原始映射，將接口和Java的POJOs（PlainOldJavaObjects，普通的Java對象）映射成數據庫中的記錄。

2、開發環境搭建以及創建Maven Web項目

參看之前的博文：https://www.jb51.net/article/131269.htm

3、SSM整合

下面主要介紹三大框架的整合，至於環境的搭建以及項目的創建，參看上面的博文。這次整合我分瞭2個配置文件，分別是spring-mybatis.xml，包含spring和mybatis的配置文件，還有個是spring-mvc的配置文件，此外有2個資源文件：jdbc.propertis和log4j.properties。完整目錄結構如下（最後附上源碼下載地址）：

使用框架的版本：

Spring4.0.2RELEASE

SpringMVC4.0.2RELEASE

MyBatis3.2.6

3.1、Maven引入需要的JAR包

在pom.xml中引入jar包

<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>com.javen.maven01</groupId>
    <artifactId>maven01</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>maven01 Maven Webapp</name>
    <url>http://maven.apache.org</url>
    
    <properties>  
        <!-- spring版本號 -->  
        <spring.version>4.0.2.RELEASE</spring.version>  
        <!-- mybatis版本號 -->  
        <mybatis.version>3.2.6</mybatis.version>  
        <!-- log4j日志文件管理包版本 -->  
        <slf4j.version>1.7.7</slf4j.version>  
        <log4j.version>1.2.17</log4j.version>  
    </properties> 
    
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
             <!-- 表示開發的時候引入，發佈的時候不會加載此包 -->  
            <scope>test</scope>
        </dependency>
        <!-- <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency> -->
        
         <!-- spring核心包 -->  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-core</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-web</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-oxm</artifactId>  
            <version>${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-jdbc</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-webmvc</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-aop</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-context-support</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
  
        <dependency>  
            <groupId>org.springframework</groupId>  
            <artifactId>spring-test</artifactId>  
            <version>${spring.version}</version>  
        </dependency>  
        <!-- mybatis核心包 -->  
        <dependency>  
            <groupId>org.mybatis</groupId>  
            <artifactId>mybatis</artifactId>  
            <version>${mybatis.version}</version>  
        </dependency>  
         <!-- mybatis/spring包 -->  
        <dependency>  
            <groupId>org.mybatis</groupId>  
            <artifactId>mybatis-spring</artifactId>  
            <version>1.2.2</version>  
        </dependency>  
        
         <!-- 導入java ee jar 包 -->  
        <dependency>  
            <groupId>javax</groupId>  
            <artifactId>javaee-api</artifactId>  
            <version>7.0</version>  
        </dependency>  
        
         <!-- 導入Mysql數據庫鏈接jar包 -->  
        <dependency>  
            <groupId>mysql</groupId>  
            <artifactId>mysql-connector-java</artifactId>  
            <version>5.1.36</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>  
        
        <!-- JSTL標簽類 -->  
        <dependency>  
            <groupId>jstl</groupId>  
            <artifactId>jstl</artifactId>  
            <version>1.2</version>  
        </dependency>  
        <!-- 日志文件管理包 -->  
        <!-- log start -->  
        <dependency>  
            <groupId>log4j</groupId>  
            <artifactId>log4j</artifactId>  
            <version>${log4j.version}</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>${slf4j.version}</version>  
        </dependency>  
  
        <dependency>  
            <groupId>org.slf4j</groupId>  
            <artifactId>slf4j-log4j12</artifactId>  
            <version>${slf4j.version}</version>  
        </dependency>  
        <!-- log end -->  
        <!-- 映入JSON -->  
        <dependency>  
            <groupId>org.codehaus.jackson</groupId>  
            <artifactId>jackson-mapper-asl</artifactId>  
            <version>1.9.13</version>  
        </dependency>  
        <!-- 上傳組件包 -->  
        <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>  
        <dependency>  
            <groupId>commons-codec</groupId>  
            <artifactId>commons-codec</artifactId>  
            <version>1.9</version>  
        </dependency>  

    </dependencies>
    
    <build>
        <finalName>maven01</finalName>
        <plugins>
            <plugin>
                <groupId>org.eclipse.jetty</groupId>
                <artifactId>jetty-maven-plugin</artifactId>
                <version>9.2.8.v20150217</version>
                <configuration>
                    <httpConnector>
                        <port>80</port>
                    </httpConnector>
                    <stopKey>shutdown</stopKey>
                    <stopPort>9966</stopPort>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

3.2、整合SpringMVC

3.2.1、配置spring-mvc.xml

配置裡面的註釋也很詳細，主要是自動掃描控制器，視圖模式，註解的啟動這三個。

<?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:p="http://www.springframework.org/schema/p"  
    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-3.1.xsd    
                        http://www.springframework.org/schema/context    
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd    
                        http://www.springframework.org/schema/mvc    
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">  
    <!-- 自動掃描該包，使SpringMVC認為包下用瞭@controller註解的類是控制器 -->  
    <context:component-scan base-package="com.javen.controller" />  
    <!-- 擴充瞭註解驅動，可以將請求參數綁定到控制器參數 -->
    <mvc:annotation-driven/>
    <!-- 靜態資源處理  css js imgs -->
    <mvc:resources location="/resources/**" mapping="/resources"/>
    
    <!--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>  
    <!-- 啟動SpringMVC的註解功能，完成請求和註解POJO的映射 -->  
    <bean  
        class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">  
        <property name="messageConverters">  
            <list>  
                <ref bean="mappingJacksonHttpMessageConverter" /> <!-- JSON轉換器 -->  
            </list>  
        </property>  
    </bean>  
      
    <!-- 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，那麼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" />    
        <!-- 啟用是為瞭推遲文件解析，以便捕獲文件大小異常 -->
        <property name="resolveLazily" value="true"/>
    </bean>   
    
    <!-- 配置ViewResolver 。可用多個ViewResolver 。使用order屬性排序。   InternalResourceViewResolver 放在最後-->
    <bean class="org.springframework.web.servlet.view.ContentNegotiatingViewResolver">
    <property name="order" value="1"></property>
        <property name="mediaTypes">
            <map>
                <!-- 告訴視圖解析器，返回的類型為json格式 -->
                <entry key="json" value="application/json" />
                <entry key="xml" value="application/xml" />
                <entry key="htm" value="text/htm" />
            </map>
        </property>
        <property name="defaultViews">
            <list>
                <!-- ModelAndView裡的數據變成JSON -->
                <bean class="org.springframework.web.servlet.view.json.MappingJacksonJsonView" />
            </list>
        </property>
        <property name="ignoreAcceptHeader" value="true"></property>
    </bean>
    
   <!-- 定義跳轉的文件的前後綴 ，視圖模式配置-->  
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
        <!-- 這裡的配置我的理解是自動給後面action的方法return的字符串加上前綴和後綴，變成一個 可用的url地址 -->  
        <property name="prefix" value="/WEB-INF/jsp/" />  
        <property name="suffix" value=".jsp" />  
    </bean>  
</beans>

3.2.2、配置web.xml文件

配置的spring-mvc的Servlet就是為瞭完成SpringMVC+MAVEN的整合。

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_3_0.xsd"  
    version="3.0">  
    <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: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>  --> 
  
    <!-- Spring MVC servlet -->  
    <servlet>  
        <servlet-name>SpringMVC</servlet-name>  
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>  
        <init-param>  
            <param-name>contextConfigLocation</param-name>  
            <param-value>classpath:spring-mvc.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>  
        <!-- 此處可以可以配置成*.do，對應struts的後綴習慣 -->  
        <url-pattern>/</url-pattern>  
    </servlet-mapping>  
    <welcome-file-list>  
        <welcome-file>/index.jsp</welcome-file>  
    </welcome-file-list>  
  
</web-app>

3.2.3、Log4j的配置

為瞭方便調試，一般都會使用日志來輸出信息，Log4j是Apache的一個開放源代碼項目，通過使用Log4j，我們可以控制日志信息輸送的目的地是控制臺、文件、GUI組件，甚至是套接口服務器、NT的事件記錄器、UNIXSyslog守護進程等；我們也可以控制每一條日志的輸出格式；通過定義每一條日志信息的級別，我們能夠更加細致地控制日志的生成過程。

Log4j的配置很簡單，而且也是通用的，下面給出一個基本的配置，換到其他項目中也無需做多大的調整，如果想做調整或者想瞭解Log4j的各種配置，參看我轉載的一篇博文，很詳細：https://www.jb51.net/article/132334.htm

下面給出配置文件目錄：

log4j.properties

log4j.rootLogger=INFO,Console,File  
#定義日志輸出目的地為控制臺  
log4j.appender.Console=org.apache.log4j.ConsoleAppender  
log4j.appender.Console.Target=System.out  
#可以靈活地指定日志輸出格式，下面一行是指定具體的格式  
log4j.appender.Console.layout = org.apache.log4j.PatternLayout  
log4j.appender.Console.layout.ConversionPattern=[%c] - %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

3.2.4、使用Jetty測試

package com.javen.model;

public class User {
    private Integer id;

    private String userName;

    private String password;

    private Integer age;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName == null ? null : userName.trim();
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password == null ? null : password.trim();
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "User [id=" + id + ", userName=" + userName + ", password="
                + password + ", age=" + age + "]";
    }
    
    
}
package com.javen.controller;
import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;  
import org.springframework.ui.Model;  
import org.springframework.web.bind.annotation.RequestMapping;  
import org.springframework.web.bind.annotation.RequestMethod;
import com.javen.model.User;
  
  
@Controller  
@RequestMapping("/user")  
// /user/**
public class UserController {  
    private static Logger log=LoggerFactory.getLogger(UserController.class);
      
    
    // /user/test?id=1
    @RequestMapping(value="/test",method=RequestMethod.GET)  
    public String test(HttpServletRequest request,Model model){  
        int userId = Integer.parseInt(request.getParameter("id"));  
        System.out.println("userId:"+userId);
        User user=null;
        if (userId==1) {
             user = new User();  
             user.setAge(11);
             user.setId(1);
             user.setPassword("123");
             user.setUserName("javen");
        }
       
        log.debug(user.toString());
        model.addAttribute("user", user);  
        return "index";  
    }  
}

在瀏覽器中輸入：http://localhost/user/test?id=1

到此 SpringMVC+Maven 整合完畢

3.3 Spring與MyBatis的整合

取消3.2.2 web.xml中註釋的代碼

3.3.1、建立JDBC屬性文件

jdbc.properties（文件編碼修改為utf-8）

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/maven
username=root
password=root
#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

此時的目錄結構為

3.3.2、建立spring-mybatis.xml配置文件

這個文件就是用來完成spring和mybatis的整合的。這裡面也沒多少行配置，主要的就是自動掃描，自動註入，配置數據庫。註釋也很詳細，大傢看看就明白瞭。

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:p="http://www.springframework.org/schema/p"  
    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-3.1.xsd    
                        http://www.springframework.org/schema/context    
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd    
                        http://www.springframework.org/schema/mvc    
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">  
    <!-- 自動掃描 -->  
    <context:component-scan base-package="com.javen" />  
    
    <!-- 引入配置文件 -->  
    <bean id="propertyConfigurer"  
        class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">  
        <property name="location" value="classpath:jdbc.properties" />  
    </bean>  
  
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"  
        destroy-method="close">  
        <property name="driverClassName" value="${driver}" />  
        <property name="url" value="${url}" />  
        <property name="username" value="${username}" />  
        <property name="password" value="${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:com/javen/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="com.javen.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>

3.4、JUnit測試

  經過以上步驟，我們已經完成瞭Spring和mybatis的整合，這樣我們就可以編寫一段測試代碼來試試是否成功瞭。

3.4.1、創建測試用表

既然我們需要測試，那麼我們就需要建立在數據庫中建立一個測試表，這個表建的很簡單，SQL語句為：

-- ----------------------------
-- Table structure for `user_t`
-- ----------------------------
DROP TABLE IF EXISTS `user_t`;
CREATE TABLE `user_t` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `user_name` varchar(40) NOT NULL,
  `password` varchar(255) NOT NULL,
  `age` int(4) NOT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of user_t
-- ----------------------------
INSERT INTO `user_t` VALUES ('1', '測試', '345', '24');
INSERT INTO `user_t` VALUES ('2', 'javen', '123', '10');

3.4.2、利用MyBatis Generator自動創建代碼

參考博文：https://www.jb51.net/article/128909.htm

這個可根據表自動創建實體類、MyBatis映射文件以及DAO接口，當然，我習慣將生成的接口名改為IUserDao，而不是直接用它生成的UserMapper。如果不想麻煩就可以不改。完成後將文件復制到工程中。如圖：

3.4.3、建立Service接口和實現類

下面給出具體的內容：

IUserService.jave

package com.javen.service;  

import com.javen.model.User;
  
  
public interface IUserService {  
    public User getUserById(int userId);  
}

UserServiceImpl.java

package com.javen.service.impl;
import javax.annotation.Resource;  

import org.springframework.stereotype.Service;  
import com.javen.dao.IUserDao;
import com.javen.model.User;
import com.javen.service.IUserService;
  
  
@Service("userService")  
public class UserServiceImpl implements IUserService {  
    @Resource  
    private IUserDao userDao;  
    
    public User getUserById(int userId) {  
        // TODO Auto-generated method stub  
        return this.userDao.selectByPrimaryKey(userId);  
    }  
  
}

3.4.4、建立測試類

測試類在src/test/java中建立，下面測試類中註釋掉的部分是不使用Spring時，一般情況下的一種測試方法；如果使用瞭Spring那麼就可以使用註解的方式來引入配置文件和類，然後再將service接口對象註入，就可以進行測試瞭。

如果測試成功，表示Spring和Mybatis已經整合成功瞭。輸出信息使用的是Log4j打印到控制臺。

package com.javen.testmybatis;

import javax.annotation.Resource;  

import org.apache.log4j.Logger;  
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;  
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;  
import com.alibaba.fastjson.JSON;  
import com.javen.model.User;
import com.javen.service.IUserService;
  
@RunWith(SpringJUnit4ClassRunner.class)     //表示繼承瞭SpringJUnit4ClassRunner類  
@ContextConfiguration(locations = {"classpath:spring-mybatis.xml"})  
  
public class TestMyBatis {  
    private static Logger logger = Logger.getLogger(TestMyBatis.class);  
//  private ApplicationContext ac = null;  
    @Resource  
    private IUserService userService = null;  
  
//  @Before  
//  public void before() {  
//      ac = new ClassPathXmlApplicationContext("applicationContext.xml");  
//      userService = (IUserService) ac.getBean("userService");  
//  }  
  
    @Test  
    public void test1() {  
        User user = userService.getUserById(1);  
        // System.out.println(user.getUserName());  
        // logger.info("值："+user.getUserName());  
        logger.info(JSON.toJSONString(user));  
    }  
}

測試結果

3.4.5、建立UserController類

UserController.java控制器

package com.javen.controller;
import java.io.File;
import java.io.IOException;
import java.util.Map;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;

import org.apache.commons.io.FileUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Controller;  
import org.springframework.ui.Model;  
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;  
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import com.javen.model.User;
import com.javen.service.IUserService;
  
  
@Controller  
@RequestMapping("/user")  
// /user/**
public class UserController {  
    private static Logger log=LoggerFactory.getLogger(UserController.class);
     @Resource  
     private IUserService userService;     
    
    // /user/test?id=1
    @RequestMapping(value="/test",method=RequestMethod.GET)  
    public String test(HttpServletRequest request,Model model){  
        int userId = Integer.parseInt(request.getParameter("id"));  
        System.out.println("userId:"+userId);
        User user=null;
        if (userId==1) {
             user = new User();  
             user.setAge(11);
             user.setId(1);
             user.setPassword("123");
             user.setUserName("javen");
        }
       
        log.debug(user.toString());
        model.addAttribute("user", user);  
        return "index";  
    }  
    
    
    // /user/showUser?id=1
    @RequestMapping(value="/showUser",method=RequestMethod.GET)  
    public String toIndex(HttpServletRequest request,Model model){  
        int userId = Integer.parseInt(request.getParameter("id"));  
        System.out.println("userId:"+userId);
        User user = this.userService.getUserById(userId);  
        log.debug(user.toString());
        model.addAttribute("user", user);  
        return "showUser";  
    }  
    
 // /user/showUser2?id=1
    @RequestMapping(value="/showUser2",method=RequestMethod.GET)  
    public String toIndex2(@RequestParam("id") String id,Model model){  
        int userId = Integer.parseInt(id);  
        System.out.println("userId:"+userId);
        User user = this.userService.getUserById(userId);  
        log.debug(user.toString());
        model.addAttribute("user", user);  
        return "showUser";  
    }  
    
    
    // /user/showUser3/{id}
    @RequestMapping(value="/showUser3/{id}",method=RequestMethod.GET)  
    public String toIndex3(@PathVariable("id")String id,Map<String, Object> model){  
        int userId = Integer.parseInt(id);  
        System.out.println("userId:"+userId);
        User user = this.userService.getUserById(userId);  
        log.debug(user.toString());
        model.put("user", user);  
        return "showUser";  
    }  
    
 // /user/{id}
    @RequestMapping(value="/{id}",method=RequestMethod.GET)  
    public @ResponseBody User getUserInJson(@PathVariable String id,Map<String, Object> model){  
        int userId = Integer.parseInt(id);  
        System.out.println("userId:"+userId);
        User user = this.userService.getUserById(userId);  
        log.info(user.toString());
        return user;  
    }  
    
    // /user/{id}
    @RequestMapping(value="/jsontype/{id}",method=RequestMethod.GET)  
    public ResponseEntity<User>  getUserInJson2(@PathVariable String id,Map<String, Object> model){  
        int userId = Integer.parseInt(id);  
        System.out.println("userId:"+userId);
        User user = this.userService.getUserById(userId);  
        log.info(user.toString());
        return new ResponseEntity<User>(user,HttpStatus.OK);  
    } 
    
    //文件上傳、
    @RequestMapping(value="/upload")
    public String showUploadPage(){
        return "user_admin/file";
    }
    
    @RequestMapping(value="/doUpload",method=RequestMethod.POST)
    public String doUploadFile(@RequestParam("file")MultipartFile file) throws IOException{
        if (!file.isEmpty()) {
            log.info("Process file:{}",file.getOriginalFilename());
        }
        FileUtils.copyInputStreamToFile(file.getInputStream(), new File("E:\\",System.currentTimeMillis()+file.getOriginalFilename()));
        return "succes";
    }
}

3.4.6、新建jsp頁面

file.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Insert title here</title>
</head>
<body>
    <h1>上傳文件</h1>
    <form method="post" action="/user/doUpload" enctype="multipart/form-data">
        <input type="file" name="file"/>
        <input type="submit" value="上傳文件"/>
        
    </form>
</body>
</html>

index.jsp

<html>
<body>
<h2>Hello World!</h2>
</body>
</html>

showUser.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>  
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  
<html>  
  <head>  
    <title>測試</title>  
  </head>  
    
  <body>  
    ${user.userName}  
  </body>  
</html>

至此，完成Spring+SpingMVC+mybatis這三大框架整合完成。

3.4.7、部署項目

輸入地址：http://localhost/user/jsontype/2

項目下載地址：https://github.com/Javen205/SSM

參考博客：https://www.jb51.net/article/125921.htm

以上就是SSM框架整合之Spring+SpringMVC+MyBatis實踐步驟的詳細內容，更多關於SSM框架的資料請關註WalkonNet其它相關文章！

以上就是SSM框架整合之Spring+SpringMVC+MyBatis實踐步驟的詳細內容，更多關於SSM框架的資料請關註WalkonNet其它相關文章！

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