使用Intellij IDEA整合Spring+Spring MVC+MyBitis

本文參考：SSM框架-詳細整合教程
主要記錄了個人整合過程以及整合過程當中遇到的錯誤，並增長了項目配置和部署的過程

剛開始接觸到後端開發是在大二事後的暑假，那時候使用的框架搭配仍是Spring+SpringMVC+iBitis（MyBitis的前身）。最近在準備面試看Spring的原理，因爲之前的項目代碼不在了，因而新建一個項目，參考教程從新整合了一遍SSM框架，並在這裏進行一些記錄。

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Rod Johnson 在其著做Expert One-On-One J2EE Development and Design中闡述的部分理念和原型衍生而來。它是爲了解決企業應用開發的複雜性而建立的。Spring使用基本的JavaBean來完成之前只可能由EJB完成的事情。然而，Spring的用途不只限於服務器端的開發。從簡單性、可測試性和鬆耦合的角度而言，任何Java應用均可以從Spring中受益。 簡單來講，Spring是一個輕量級的控制反轉（IoC）和麪向切面（AOP）的容器框架。

1.2 SpringMVC

Spring MVC屬於SpringFrameWork的後續產品，已經融合在Spring Web Flow裏面。Spring MVC 分離了控制器、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製。

1.3 MyBitis

MyBatis 本是apache的一個開源項目iBatis, 2010年這個項目由apache software foundation 遷移到了google code，而且更名爲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SQL Maps和Data Access Objects（DAO）MyBatis 消除了幾乎全部的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（Plain Old Java Objects，普通的 Java對象）映射成數據庫中的記錄。

2. 開發環境

JDK1.8.0_111
Tomcat8
Intellij IDEA

本次整合的框架版本爲
Spring 4.0.2 RELEASE
Spring MVC 4.0.2 RELEASE
MyBatis 3.2.6

3. 建立項目開整

3.1建立maven javaweb項目

File->New Project，勾選Create ...選擇相應選項，點擊Next

填寫GroupId、ArtifactId和Version，這裏的ArtifactId記住後面要用到。點擊Next

點擊Next

輸入項目名稱和目錄，Project Format我選擇的是.ipr ,點擊Finish

至此一個maven web項目就建立成功了，會自動生成以下幾個文件

3.2 Maven引入項目須要的JAR包

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>pw.greatxiaohan</groupId>
    <artifactId>simplessm</artifactId>
    <packaging>war</packaging>
    <version>1.0-SNAPSHOT</version>
    <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日誌文件管理包版本 -->
        <slf4j.version>1.7.7</slf4j.version>
        <log4j.version>1.2.15</log4j.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</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>
        <!-- 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數據庫連接jar包 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.30</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標籤類 -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <!-- 日誌文件管理包 -->
        <!-- log start -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>${log4j.version}</version>
        </dependency>
        <!-- 格式化對象，方便輸出日誌 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.1.41</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>${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>simplessm</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.5.1</version>
                <configuration>
                    <source>1.7</source>
                    <target>1.7</target>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

這裏要注意必定要有<packaging>war</packaging>, 且<artifactId>simplessm</artifactId>以及<finalName>simplessm</finalName>這兩個參數應當與以前填寫的保持一致

3.3 Spring、SpringMVC與MyBitis整合

全部須要的Jar包引入以後，開始框架的整合。首先看一下按照我我的習慣創建的項目結構圖：

3.3.1 新建JDBC屬性文件

jdbc.properties

driver=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/simplessm?useUnicode=true&characterEncoding=utf-8
username=root
password=111111
#定義初始鏈接數
initialSize=0
#定義最大鏈接數
maxActive=20
#定義最大空閒
maxIdle=20
#定義最小空閒
minIdle=1
#定義最長等待時間
maxWait=60000

3.3.2 新建log4j屬性文件

log4j.properties

#定義LOG輸出級別
log4j.rootLogger=INFO,Console,File
#定義日誌輸出目的地爲控制檯
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
#能夠靈活地指定日誌輸出格式，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/springmvcMybist/ssm.log
#定義文件最大大小
log4j.appender.File.MaxFileSize = 10MB
#輸出因此日誌，若是換成DEBUG表示輸出DEBUG以上級別日誌
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

3.3.3 新建Spring和MyBitis整合所需的配置文件

spring-mybitis.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="priv.xiaohan.ssm" />
    <!-- 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}" />
        <!-- 初始化鏈接大小 -->
        <property name="initialSize" value="${initialSize}"></property>
        <!-- 鏈接池最大數量 -->
        <property name="maxActive" value="${maxActive}"></property>
        <!-- 鏈接池最大空閒 -->
        <property name="maxIdle" value="${maxIdle}"></property>
        <!-- 鏈接池最小空閒 -->
        <property name="minIdle" value="${minIdle}"></property>
        <!-- 獲取鏈接最大等待時間 -->
        <property name="maxWait" value="${maxWait}"></property>
    </bean>

    <!-- spring和MyBatis完美整合，不須要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: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="priv.xiaohan.ssm.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>

3.3.4 新建整合SpringMVC所需的配置文件

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: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-4.0.xsd
                            http://www.springframework.org/schema/context
                            http://www.springframework.org/schema/context/spring-context-4.0.xsd
                            http://www.springframework.org/schema/mvc
                            http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

    <!--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>

    <!-- 啓動SpringMVC的註解功能，完成請求和註解model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>

    <!-- 對靜態資源的訪問 -->
    <!-- <mvc:resources mapping="/js/**" location="/js/" />
    <mvc:resources mapping="/css/**"  location="/css/" /> -->

    <!-- 自動掃描該包，使SpringMVC認爲包下用了@controller註解的類是控制器 -->
    <context:component-scan base-package="priv.xiaohan.ssm.controller" />

    <!-- 添加註解驅動 -->
    
    <mvc:annotation-driven enable-matrix-variables="true" />
    <!-- 容許對靜態資源文件的訪問 -->

    <mvc:default-servlet-handler />

    <!-- 定義跳轉的文件的先後綴 ，視圖模式配置 -->
    <bean
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!-- 這裏的配置個人理解是自動給後面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>

    <!-- 配置文件上傳，若是沒有使用文件上傳能夠不用配置，固然若是不配，那麼配置文件中也沒必要引入上傳組件包 -->
    <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>

3.3.5 配置web.xml文件

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>
        <!-- 此處能夠能夠配置成*.do，對應struts的後綴習慣 -->
        <url-pattern>/</url-pattern>
    </servlet-mapping>
    
    <welcome-file-list>
        <welcome-file>/index.html</welcome-file>
        <welcome-file>/index.jsp</welcome-file>
    </welcome-file-list>
</web-app>

至此已經完成了ssm框架的整合，接下來是一些測試代碼，完成後進行項目的配置和部署

3.3.6 相關測試文件源碼

1.數據庫建表，在數據庫中執行。文件放在src/main/java/SQL下備忘，能夠不保存

user_t.sql

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=2 DEFAULT CHARSET=utf8;

/*Data for the table `user_t` */

insert  into `user_t`(`id`,`user_name`,`password`,`age`) values (1,'測試','sfasgfaf',24);

2.新建index.jsp歡迎頁和"User"頁面,這裏的User.jsp頁面經過SpringMVC與後面要提到的Controller中的對象綁定

index.jsp

<html>
<body>
<h2>Hello World!23333</h2>
</body>
</html>

User.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>測試</title>
</head>
<body>${user.userName}
</body>
</html>

3.創建實體類、MyBitis映射文件以及Dao接口

User.java

package priv.xiaohan.ssm.model;

import java.util.Date;


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;
    }
}

UserDao.java

package priv.xiaohan.ssm.dao;

import priv.xiaohan.ssm.model.User;

public interface UserDao {
    int deleteByPrimaryKey(Integer id);

    int insert(User record);

    int insertSelective(User record);

    User selectByPrimaryKey(Integer id);

    int updateByPrimaryKeySelective(User record);

    int updateByPrimaryKey(User record);
}

UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="priv.xiaohan.ssm.dao.UserDao" >
    <resultMap id="BaseResultMap" type="priv.xiaohan.ssm.model.User" >
        <id column="id" property="id" jdbcType="INTEGER" />
        <result column="user_name" property="userName" jdbcType="VARCHAR" />
        <result column="password" property="password" jdbcType="VARCHAR" />
        <result column="age" property="age" jdbcType="INTEGER" />
    </resultMap>
    <sql id="Base_Column_List" >
        id, user_name, password, age
    </sql>
    <select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
        select
        <include refid="Base_Column_List" />
        from user_t
        where id = #{id,jdbcType=INTEGER}
    </select>
    <delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
        delete from user_t
        where id = #{id,jdbcType=INTEGER}
    </delete>
    <insert id="insert" parameterType="priv.xiaohan.ssm.model.User" >
        insert into user_t (id, user_name, password,
        age)
        values (#{id,jdbcType=INTEGER}, #{userName,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR},
        #{age,jdbcType=INTEGER})
    </insert>
    <insert id="insertSelective" parameterType="priv.xiaohan.ssm.model.User" >
        insert into user_t
        <trim prefix="(" suffix=")" suffixOverrides="," >
            <if test="id != null" >
                id,
            </if>
            <if test="userName != null" >
                user_name,
            </if>
            <if test="password != null" >
                password,
            </if>
            <if test="age != null" >
                age,
            </if>
        </trim>
        <trim prefix="values (" suffix=")" suffixOverrides="," >
            <if test="id != null" >
                #{id,jdbcType=INTEGER},
            </if>
            <if test="userName != null" >
                #{userName,jdbcType=VARCHAR},
            </if>
            <if test="password != null" >
                #{password,jdbcType=VARCHAR},
            </if>
            <if test="age != null" >
                #{age,jdbcType=INTEGER},
            </if>
        </trim>
    </insert>
    <update id="updateByPrimaryKeySelective" parameterType="priv.xiaohan.ssm.model.User" >
        update user_t
        <set >
            <if test="userName != null" >
                user_name = #{userName,jdbcType=VARCHAR},
            </if>
            <if test="password != null" >
                password = #{password,jdbcType=VARCHAR},
            </if>
            <if test="age != null" >
                age = #{age,jdbcType=INTEGER},
            </if>
        </set>
        where id = #{id,jdbcType=INTEGER}
    </update>
    <update id="updateByPrimaryKey" parameterType="priv.xiaohan.ssm.model.User" >
        update user_t
        set user_name = #{userName,jdbcType=VARCHAR},
        password = #{password,jdbcType=VARCHAR},
        age = #{age,jdbcType=INTEGER}
        where id = #{id,jdbcType=INTEGER}
    </update>
</mapper>

4.創建Service接口和實現類

IUserService.java

package priv.xiaohan.ssm.service;
import priv.xiaohan.ssm.model.User;
/**
 * Created by xiaohan on 2017/3/15.
 */

public interface IUserService {
    public User getUserByID(int id);
}

UserService.java

package priv.xiaohan.ssm.service.impl;

import org.springframework.stereotype.Service;
import priv.xiaohan.ssm.dao.UserDao;
import priv.xiaohan.ssm.model.User;

import javax.annotation.Resource;
import java.util.List;
import priv.xiaohan.ssm.service.IUserService;

@Service("userService")
public class UserService implements IUserService {

    @Resource
    private UserDao userdao;

    public User getUserByID(int id) {
        return this.userdao.selectByPrimaryKey(id);
    }
}

5.創建Controller類和測試類

UserController.java

package priv.xiaohan.ssm.controller;

import org.springframework.web.bind.annotation.ResponseBody;
import priv.xiaohan.ssm.model.User;
import org.apache.log4j.Logger;
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;
import java.util.List;
import priv.xiaohan.ssm.service.IUserService;

@Controller
@RequestMapping("/user")
public class UserController {

    @Resource
    private IUserService userService;

    @RequestMapping("/showUser")
    public String toIndex(HttpServletRequest request, Model model) {
        int userId = Integer.parseInt(request.getParameter("id"));
        User user = this.userService.getUserByID(userId);
        //綁定對象到User.jsp
        model.addAttribute("user", user);
        return "User"; 
        
    }
}

TestMyBatis.java

import javax.annotation.Resource;

import org.apache.log4j.Logger;
import org.junit.Before;
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 priv.xiaohan.ssm.model.User;
import priv.xiaohan.ssm.service.IUserService;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath:spring-mybatis.xml" })
public class TestMyBatis {
    private static Logger logger = Logger.getLogger(TestMyBatis.class);

    @Resource
    private IUserService userService = null;


    @Test
    public void test() {
        User user = userService.getUserByID(1);
        System.out.println(user.getUserName());
        // logger.info("值："+user.getUserName());
        logger.info(JSON.toJSONString(user));
    }
}

到這裏項目的測試文件源碼都已經完成了

4.項目配置和部署

4.1 File -> Project Structure，進入建立項目配置窗口

按下圖方式配置項目

4.2 建立Tomcat容器實例，部署項目

點擊右上角的三角角標Edit Configuration

點擊左上角的」+「號，添加Tomcat Server ,Local

而後按下圖配置

切換到Deployment，左下角添加Artifact...

至此項目的配置完成，啓動Tomcat進行部署

啓動成功後輸入地址http://localhost:8080
看到首頁，

輸入地址：http://localhost:8080/user/sh...
看到」測試「表示項目整合成功！

5.整合中遇到的問題及解決辦法

錯誤1 java.lang.IllegalStateException: Failed to load ApplicationContext

報這個異常java.lang.IllegalStateException: Failed to load ApplicationContext的時候，一般是由於applicationContent.xml裏面的bean初始化失敗的緣由。
檢查代碼後發現是Mapper出現的錯誤致使，源碼中已修正

進階1 Controller直接輸出，不通過User.jsp輸出內容

1.修改Controller類，使用@ResponseBody註解

//直接在網頁輸出內容，適合寫接口
    @ResponseBody
    @RequestMapping("/showUser")
    public String toIndex(HttpServletRequest request, Model model) {
        int userId = Integer.parseInt(request.getParameter("id"));
        User user = this.userService.getUserByID(userId);
        //綁定對象到User.jsp
        model.addAttribute("user", user);
        //return "User";
        return "這裏直接輸出："+user.getUserName().toString();

    }

這時候發現中文出現了亂碼的狀況，應該是編碼的問題，查閱資料後發現只需在spring-mvc.xml配置文件內添加以下內容：

<!-- 添加註解驅動 -->
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter">
        <property name="messageConverters">
            <list>
                <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                    <property name="supportedMediaTypes">
                        <list>
                            <value>text/html;charset=UTF-8</value>
                        </list>
                    </property>
                </bean>
            </list>
        </property>
    </bean>

放在下面這段代碼的前面便可

<mvc:annotation-driven enable-matrix-variables="true" />

（轉載請註明出處：https://segmentfault.com/a/11...）