Spring+SpringMVC+mybatis入门（环境搭建+crud）
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大学毕业快一年了，在学校里做了一个android APP的项目，一直都只是熟悉android后台开发是最大的短板，工作后，公司都是自己的框架，这种开源框架基本也没时间去接触。app和后台都是基于公司的平台开发，我觉得一个人做也没有啥难度。一直在混日子，把整个app的架构分析了一遍。后来公司业务需求，我被迫PC端和android客户端都的做。真心现在啥都不是研究的很深。心累。吐槽完毕。接下来，记录我自己学习ssm框架完成crud的整个过程。
一、开发环境搭建
1、新建一个动态web项目
点击完成工程就创建完毕。本文是以ssm为工程的如下：
2、配置基于SSM的开发环境
2,1添加springmvc和mybatis的整合需要的所有jar包
jar包下载将在后面提供。
2.2配置web.xml
2.2.1加载spring容器
如下所示是spring配置的类所在的路径:
<!-- 加载spring容器 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/classes/spring/applicationContext-*.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>2.2.2springmvc前端控制器
<!-- springmvc前端控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- contextConfigLocation配置springmvc加载的配置文件（配置处理器映射器、适配器等等） 如果不配置contextConfigLocation，默认加载的是/WEB-INF/servlet名称-serlvet.xml（springmvc-servlet.xml） -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.action</url-pattern>
</servlet-mapping>2.2.3post乱码过虑器
<!-- post乱码过虑器 -->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>2.2.4整个web.xml文件
<?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" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>SSM</display-name>
<!-- 加载spring容器 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/classes/spring/applicationContext-*.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- springmvc前端控制器 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- contextConfigLocation配置springmvc加载的配置文件（配置处理器映射器、适配器等等） 如果不配置contextConfigLocation，默认加载的是/WEB-INF/servlet名称-serlvet.xml（springmvc-servlet.xml） -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
</servlet-mapping>
<!-- post乱码过虑器 -->
<filter>
<filter-name>CharacterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>CharacterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
</web-app>
2.3创建配置文件
工程下建立源文件夹
创建spring相关的配置文件夹:
首先在config文件夹下创建如下文件：
db.properties
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis
jdbc.username=root
jdbc.password=mysql
log4j.properties
# Global logging configuration\\uff0c\\u5efa\\u8bae\\u5f00\\u53d1\\u73af\\u5883\\u4e2d\\u8981\\u7528debug
log4j.rootLogger=DEBUG, stdout
# 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
然后在spring文件夹下配置如下文件
applicationContext-dao.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">
<!-- 加载db.properties文件中的内容，db.properties文件中key命名要有一定的特殊规则 -->
<context:property-placeholder location="classpath:db.properties" />
<!-- 配置数据源 ，dbcp -->
<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" />
<property name="maxActive" value="30" />
<property name="maxIdle" value="5" />
</bean>
<!-- sqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 数据库连接池 -->
<property name="dataSource" ref="dataSource" />
<!-- 加载mybatis的全局配置文件 -->
<property name="configLocation" value="classpath:mybatis/sqlMapConfig.xml" />
</bean>
<!-- mapper扫描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 扫描包路径，如果需要扫描多个包，中间使用半角逗号隔开 -->
<property name="basePackage" value="com.yqq.ssm.mapper"></property>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
</bean>
</beans>
applicationContext-service.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">
<!-- 商品管理的service -->
<bean id="itemsService" class="com.yqq.ssm.service.impl.ItemsServiceImpl"/>
</beans>applicationContext-transaction.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd ">
<!-- 事务管理器
对mybatis操作数据库事务控制，spring使用jdbc的事务控制类
-->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<!-- 数据源
dataSource在applicationContext-dao.xml中配置了
-->
<property name="dataSource" ref="dataSource"/>
</bean>
<!-- 通知 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<!-- 传播行为 -->
<tx:method name="save*" propagation="REQUIRED"/>
<tx:method name="delete*" propagation="REQUIRED"/>
<tx:method name="insert*" propagation="REQUIRED"/>
<tx:method name="update*" propagation="REQUIRED"/>
<tx:method name="find*" propagation="SUPPORTS" read-only="true"/>
<tx:method name="get*" propagation="SUPPORTS" read-only="true"/>
<tx:method name="select*" propagation="SUPPORTS" read-only="true"/>
</tx:attributes>
</tx:advice>
<!-- aop -->
<aop:config>
<aop:advisor advice-ref="txAdvice" pointcut="execution(* com.yqq.ssm.service.impl.*.*(..))"/>
</aop:config>
</beans>创建mybatis相关的文件夹
sqlMapConfig.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<!-- 全局setting配置，根据需要添加 -->
<!-- 配置别名 -->
<typeAliases>
<!-- 批量扫描别名 -->
<package name="com.yqq.ssm.po"/>
</typeAliases>
<!-- 配置mapper
由于使用spring和mybatis的整合包进行mapper扫描，这里不需要配置了。
必须遵循：mapper.xml和mapper.java文件同名且在一个目录
-->
<!-- <mappers>
</mappers> -->
</configuration>逆向工程生成po类和mapper接口
修改数据库连接
运行后生成的代码
为了生成动态代理对象，servce能自动注入需要确保如下配置。
编写service层类
Service层的方法需要注册到spring容器中
编写控制层controller
控制层调用service层的方法。通过modeandview返回数据给视图层（视图层通过addobject key取数据）。
视图层
调用控制层方法：
function queryItems()
//提交form
document.itemsForm.action="$pageContext.request.contextPath /items/getItemInfo.action?id=1";
document.itemsForm.submit();
<input type="button" value="查询" onclick="queryItems()"/>
http://localhost:8080/SSM/items/getItemInfo.action？id=1即可访问
至此环境搭建完成。
下面进行crud操作。
1、首先，需要建立一个test2数据库。
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/test2
jdbc.username=root
jdbc.password=admin
2、dao开发
便于扩展，定义如下三个类
package com.yqq.ssm.po;
import java.util.Date;
import javax.validation.constraints.Size;
import org.hibernate.validator.constraints.NotEmpty;
public class Items
private Integer id;
private String name;
private Float price;
private String pic;
private Date createtime;
private String detail;
public Integer getId()
return id;
public void setId(Integer id)
this.id = id;
public String getName()
return name;
public void setName(String name)
this.name = name == null ? null : name.trim();
public Float getPrice()
return price;
public void setPrice(Float price)
this.price = price;
public String getPic()
return pic;
public void setPic(String pic)
this.pic = pic == null ? null : pic.trim();
public Date getCreatetime()
return createtime;
public void setCreatetime(Date createtime)
this.createtime = createtime;
public String getDetail()
return detail;
public void setDetail(String detail)
this.detail = detail == null ? null : detail.trim();
package com.yqq.ssm.po;
public class ItemsCustom extends Items
package com.yqq.ssm.po;
public class ItemsCustomVO
private Items items;
private ItemsCustom itemsCustom;
public Items getItems()
return items;
public void setItems(Items items)
this.items = items;
public ItemsCustom getItemsCustom()
return itemsCustom;
public void setItemsCustom(ItemsCustom itemsCustom)
this.itemsCustom = itemsCustom;
编写ItemCustomMapper.xmll映射文件
<?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.yqq.ssm.mapper.ItemCustomMapper" >
<insert id="saveItems" parameterType="itemsCustomVO" >
<selectKey keyProperty="itemsCustom.id" order="AFTER" resultType="java.lang.Integer" >
select LAST_INSERT_ID()
</selectKey>
insert into items(name,price,pic,createtime,detail) values(#itemsCustom.name,#itemsCustom.price,
#itemsCustom.pic,#itemsCustom.createtime,#itemsCustom.detail)
</insert>
<insert id="saveItemsUUID" parameterType="itemsCustomVO" >
<selectKey keyProperty="itemsCustom.id" order="BEFORE" resultType="java.lang.String" >
select uuid()
</selectKey>
insert into items(name,price,pic,createtime,detail) values(#itemsCustom.name,#itemsCustom.price,#itemsCustom.pic,#itemsCustom.createtime,#itemsCustom.detail)
</insert>
<select id="getAllItemsInfos" resultType="itemsCustom">
select * from items
</select>
<update id="updItems" parameterType="itemsCustomVO" >
update items set name=#itemsCustom.name,price=#itemsCustom.price,pic=#itemsCustom.pic,createtime=#itemsCustom.createtime,
detail=#itemsCustom.detail where id=#itemsCustom.id
</update>
<update id="updItems2" parameterType="itemsCustomVO">
update items set name=#itemsCustom.name,price=#itemsCustom.price,pic=#itemsCustom.pic,createtime=#itemsCustom.createtime,
detail=#itemsCustom.detail where id=#itemsCustom.id
</update>
<delete id="delItembyId" parameterType="int">
delete from items where id=#id
</delete>
</mapper>定义ItemCustomMapper..java接口
package com.yqq.ssm.mapper;
import java.util.List;
import com.yqq.ssm.po.ItemsCustom;
import com.yqq.ssm.po.ItemsCustomVO;
public interface ItemCustomMapper
int saveItems(ItemsCustomVO v) throws Exception;
int saveItemsUUID(ItemsCustomVO v) throws Exception;
List<ItemsCustom> getAllItemsInfos() throws Exception;
void updItems(ItemsCustomVO v)throws Exception;
void delItembyId(int v)throws Exception;
编写service层代码
定义service接口，如下：
注册服务给controller使用：
控制层：
整个学习项目访问的地址：http://localhost:8080/SSM/items/getAllItemsInfos.action
代码下载地址：http://download.csdn.net/detail/u014600432/9527779
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