上一篇已经讲述了如何在IDEA中基于maven搭建springMVC框架,本篇在之前的基础上集成了mybatis功能。主要工作如下:
1)升级web.xml,增加编码过滤器功能,将dispatcher-servlet.xml和applicationContext.xml移至resources目录下;
2)升级applicationContext.xml,将mybatis配置项放置到该文件;且将数据库配置项移至jdbc.properties ;
3)按照层次结构创建controller、pojo、service、dao各个层的类;
4)创建数据库及测试表;
5)配置pom依赖包;
组织结构如下图所示
1 web.xml
- 增加了对中文的编码过滤器
<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >
<web-app>
<display-name>Archetype Created Web Application</display-name>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:dispatcher-servlet.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 编码过滤器 -->
<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>
</web-app>
2 应用上下文和dispatcher配置项
- 2.1 dispatcher-servlet.xml基本没变化
<?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.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<!--此文件负责整个mvc中的配置-->
<!-- 自动扫描该包,使用SpringMVC认为包下用了@Controller注解的类是控制器,避免扫描@Service导致事务不能使用 -->
<context:component-scan base-package = "com.uzone.controller">
<context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
</context:component-scan>
<!--启用spring的一些annotation -->
<context:annotation-config/>
<!-- 配置注解驱动 可以将request参数绑定到controller参数上 -->
<mvc:annotation-driven/>
<!--避免IE执行AJAX时,返回JSON出现下载文件 -->
<bean id = "mappingJacksonHttpMessageConverter"
class = "org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name = "supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
</list>
</property>
</bean>
<!--静态资源映射-->
<!--本项目把静态资源放在了webapp的statics目录下,资源映射如下-->
<mvc:resources mapping="/css/**" location="/WEB-INF/statics/css/"/>
<mvc:resources mapping="/js/**" location="/WEB-INF/statics/js/"/>
<mvc:resources mapping="/image/**" location="/WEB-INF/statics/image/"/>
<!-- 对模型视图名称的解析,即在模型视图名称添加前后缀(如果最后一个还是表示文件夹,则最后的斜杠不要漏了) 使用JSP-->
<!-- 默认的视图解析器 在上边的解析错误时使用 (默认使用html)- -->
<bean id="defaultViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
<property name="prefix" value="/WEB-INF/view/"/><!--设置JSP文件的目录位置-->
<property name="suffix" value=".jsp"/>
<property name="exposeContextBeansAsAttributes" value="true"/>
</bean>
</beans>
- 2.2 applicationContext.xml
配置mybatis、配置事务、自动扫描controller和service层
<?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:tx="http://www.springframework.org/schema/tx"
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/tx
http://www.springframework.org/schema/tx/spring-tx.xsd">
<!-- 自动扫描 -->
<context:component-scan base-package="com.uzone"/>
<!-- 引入数据库配置文件 -->
<bean id = "propertyConfigurer"
class = "org.springframework.beans.factory.config.PreferencesPlaceholderConfigurer">
<property name = "location" value="classpath:jdbc.properties" />
</bean>
<!-- 连接池 -->
<bean id = "dataSource" class = "org.apache.commons.dbcp.BasicDataSource"
destroy-method = "close">
<property name="driverClassName" value="${driverClass}"/>
<property name="url" value="${jdbcUrl}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
<!-- 初始化连接大小 -->
<property name="initialSize" value="${initialSize}"></property>
<!-- 连接池最大数量 -->
<property name="maxActive" value="${maxActive}"></property>
<!-- 连接池最大空闲 -->
<property name="maxIdle" value="${maxIdle}"></property>
<!-- 连接池最小空闲 -->
<property name="minIdle" value="${minIdle}"></property>
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="${maxWait}"></property>
</bean>
<!-- 结合Spring和Mybatis -->
<bean id = "sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描mapping.xml文件 -->
<property name = "mapperLocations" value="classpath:mapping/*.xml" />
</bean>
<!-- DAO接口所在包名,Spring会自动查找其下的类 -->
<bean class = "org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name = "basePackage" value="com.uzone.dao" />
<property name = "sqlSessionFactoryBeanName" value = "sqlSessionFactory" />
</bean>
<!-- 定义事务 -->
<bean id = "transactionManager"
class = "org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name = "dataSource" ref = "dataSource" />
</bean>
<!-- 使用注解定义事务 -->
<tx:annotation-driven transaction-manager = "transactionManager" />
</beans>
- 2.3 jdbc.properties
driverClass=com.mysql.jdbc.Driver
jdbcUrl=jdbc:mysql://192.168.0.5:3306/test?useUnicode=true&characterEncoding=utf-8
username=root
password=******
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=3600
2.4 log4j.properties
log4j.rootLogger=INFO,Console,File
#控制台日志
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=[%p][%t][%d{yyyy-MM-dd HH\:mm\:ss}][%C] - %m%n
#普通文件日志
log4j.appender.File=org.apache.log4j.RollingFileAppender
log4j.appender.File.File=logs/ssm.log
log4j.appender.File.MaxFileSize=10MB
#输出日志,如果换成DEBUG表示输出DEBUG以上级别日志
log4j.appender.File.Threshold=ALL
log4j.appender.File.layout=org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern=[%p][%t][%d{yyyy-MM-dd HH\:mm\:ss}][%C] - %m%n
#设置输出日志文件编码
log4j.appender.File.Encoding=UTF-8
3 搭建控制层服务层实体层和数据访问层类及依赖关系
- 3.1 POJO
package com.uzone.pojo;
public class Test {
private Integer id;
private Integer test1;
private String test2;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getTest1() {
return test1;
}
public void setTest1(Integer test1) {
this.test1 = test1;
}
public String getTest2() {
return test2;
}
public void setTest2(String test2) {
this.test2 = test2;
}
}
- 3.2 service接口
package com.uzone.service;
import com.uzone.pojo.Test;
public interface TestService {
Test getById(int id);
}
- 3.3 service实现
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service("testService")
public class TestServiceImp implements TestService {
@Autowired(required = false)
private TestMapper testMapper = null;
public Test getById(int id) {
return testMapper.selectByPrimaryKey(id);
}
}
- 3.4 DAO 接口
public interface TestMapper {
Test selectByPrimaryKey(Integer id);
}
- 3.5 mapping (在resources目录下,通过applicationContext.xml配置)
<?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="com.uzone.dao.TestMapper">
<resultMap id="BaseResultMap" type="com.uzone.pojo.Test">
<id column="id" property="id" jdbcType="INTEGER" />
<result column="test1" property="test1" jdbcType="INTEGER" />
<result column="test2" property="test2" jdbcType="VARCHAR" />
</resultMap>
<sql id = "Base_Column_List">
id, test1, test2
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer">
SELECT
<include refid="Base_Column_List" />
FROM test
WHERE id = #{id, jdbcType = INTEGER}
</select>
</mapper>
- 3.6 Controller
<?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="com.uzone.dao.TestMapper">
<resultMap id="BaseResultMap" type="com.uzone.pojo.Test">
<id column="id" property="id" jdbcType="INTEGER" />
<result column="test1" property="test1" jdbcType="INTEGER" />
<result column="test2" property="test2" jdbcType="VARCHAR" />
</resultMap>
<sql id = "Base_Column_List">
id, test1, test2
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer">
SELECT
<include refid="Base_Column_List" />
FROM test
WHERE id = #{id, jdbcType = INTEGER}
</select>
</mapper>
4数据库及表
5 pom依赖包
下面的包基本是最小依赖包
<properties>
<!-- spring版本号 -->
<spring.version>4.2.6.RELEASE</spring.version>
<!-- mybatis版本号 -->
<mybatis.version>3.4.0</mybatis.version>
<!-- mysql驱动版本号 -->
<mysql-driver.version>5.1.35</mysql-driver.version>
<!-- log4j日志包版本号 -->
<slf4j.version>1.7.21</slf4j.version>
<log4j.version>1.2.17</log4j.version>
</properties>
<dependencies>
<!--J2EE-->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>3.1.0</version>
</dependency>
<dependency>
<groupId>javax.servlet.jsp</groupId>
<artifactId>jsp-api</artifactId>
<version>2.2</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!--springframework-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 添加mybatis依赖 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<!-- 添加mybatis/spring整合包依赖 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<!-- 添加mysql驱动依赖 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql-driver.version}</version>
</dependency>
<!-- 导入连接池dbcp的jar包,用来在applicationContext.xml中配置数据库 -->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.2.2</version>
</dependency>
<!-- 格式化对象,方便输出日志 添加fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.1.41</version>
</dependency>
<!--测试-->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<!--日志-->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>${log4j.version}</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>
<!--其他需要的包-->
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.4</version>
</dependency>
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<!-- 添加fastjson -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.1.41</version>
</dependency>
</dependencies>
6 运行结果
http://localhost:8080/home/get?id=1