整合 spring 4(包括mvc、context、orm) + mybatis 3 示例

2019-11-10 16:55:32

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作者各必备工具的版本如下：MySQL：5.6.25-log MySQL Community Server (GPL) (下载地址)Tomcat：apache-tomcat-7.0.63 (下载链接)java EE - Eclipse：Luna Service Release 1 v4.4.1 (下载链接)SPRing：4.2.0.RELEASE (无须下载)MyBatis：3.3.0 (无须下载)JDK：1.7.0_67 (下载链接)

项目搭建

第三方包依赖 pom.xml：[html] view plain copy print?<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>bdp</groupId> <artifactId>bdp</artifactId> <version>1.0.0</version> <packaging>war</packaging> <name>bdp</name> <description>Basic Data Platform</description> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <spring.version>4.2.0.RELEASE</spring.version> </properties> <dependencies>   <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</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-webmvc</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> <version>1.1.3</version> </dependency> <dependency> <groupId>org.codehaus.jackson</groupId> <artifactId>jackson-mapper-asl</artifactId> <version>1.9.13</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-annotations</artifactId> <version>2.6.1</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-core</artifactId> <version>2.6.1</version> </dependency> <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.6.1</version> </dependency>   <dependency> <groupId>org.springframework</groupId> <artifactId>spring-orm</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>1.2.3</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.36</version> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.3.0</version> </dependency> <dependency> <groupId>c3p0</groupId> <artifactId>c3p0</artifactId> <version>0.9.1.2</version> </dependency>   <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency>  </dependencies> <build> <plugins> <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>3.1</version> <configuration> <source>1.7</source> <target>1.7</target> </configuration> </plugin> <plugin> <artifactId>maven-war-plugin</artifactId> <version>2.4</version> <configuration> <warSourceDirectory>WebContent</warSourceDirectory> <failOnMissingWebXml>false</failOnMissingWebXml> </configuration> </plugin> </plugins> </build> </project> 测试用表 CITY_CODE_CN：[sql] view plain copy print?CREATE TABLE `CITY_CODE_CN` ( `ID` SMALLINT UNSIGNED NOT NULL AUTO_INCREMENT COMMENT '主键', `CITY_CODE` CHAR(4) NOT NULL COMMENT '城市代码》四位阿拉伯数字', `CITY_JB` TINYINT UNSIGNED NOT NULL COMMENT '城市级别》非空。1：省级；2：地级；3：县级', `PROVINCE_CODE` CHAR(4) NOT NULL COMMENT '所在省份代码》非空', `STATE` CHAR(1) NOT NULL DEFAULT '1' COMMENT '城市状态》非空。0：无效城市；1：有效城市', `CITY_NAME` VARCHAR(50) NOT NULL COMMENT '城市名称', `CITY` VARCHAR(50) NOT NULL COMMENT '所在地级市名称', `PROVINCE` VARCHAR(50) NOT NULL COMMENT '所在省份名称', PRIMARY KEY (`ID`) ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=UTF8 COMMENT '全国城市表'; 注意存储引擎不可以是不支持事务的 MyISAM(InnoDB 和 MyISAM 的区别参考博客《MySql 存储引擎的选取》)。表 CITY_CODE_CN 映射到的 xml 文件 com.defonds.bdp.city.mapper.CityMapper.xml：[html] view plain copy print?<?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.defonds.bdp.city.mapper.CityMapper" > <insert id="insertCity" parameterType="com.defonds.bdp.city.bean.City"> insert into city_code_cn (city_code, city_jb, province_code, city_name, city, province) values ( #{cityCode,jdbcType=CHAR}, #{cityJb,jdbcType=INTEGER}, #{provinceCode,jdbcType=CHAR}, #{cityName,jdbcType=VARCHAR}, #{city,jdbcType=VARCHAR}, #{province,jdbcType=VARCHAR} ) </insert> </mapper> 表 CITY_CODE_CN 映射到的 java 文件 com.defonds.bdp.city.bean.City.java：[java] view plain copy print?/** * File Name：City.java * * Copyright Defonds Corporation 2015 * All Rights Reserved * */ package com.defonds.bdp.city.bean; import org.codehaus.jackson.map.annotate.JsonSerialize; import com.fasterxml.jackson.databind.PropertyNamingStrategy; import com.fasterxml.jackson.databind.annotation.JsonNaming; /** * * Project Name：bdp * Type Name：City * Type Description： * 1. annotation @JsonSerialize, Entity serialized to json * 2. annotation @JsonNaming, convert Higher case to under score * and Lower case, example: cityCode, * after json naming convert, will be city_code * Author：Defonds * Create Date：2015-08-28 * @version * */ @JsonSerialize @JsonNaming(PropertyNamingStrategy.LowerCaseWithUnderscoresStrategy.class) public class City { private String id; private String cityCode; private String provinceCode; private String cityName; private String cityJb; private String city; private String province; public String getId() { return id; } public void setId(String id) { this.id = id; } public String getCityCode() { return cityCode; } public void setCityCode(String cityCode) { this.cityCode = cityCode; } public String getCityName() { return cityName; } public void setCityName(String cityName) { this.cityName = cityName; } public String getCityJb() { return cityJb; } public void setCityJb(String cityJb) { this.cityJb = cityJb; } public String getCity() { return city; } public void setCity(String city) { this.city = city; } public String getProvince() { return province; } public void setProvince(String province) { this.province = province; } public String getProvinceCode() { return provinceCode; } public void setProvinceCode(String provinceCode) { this.provinceCode = provinceCode; } } 处理所有 MyBatis 的配置文件的配置文件 mybatis-config.xml：[html] view plain copy print?<?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> <settings> <setting name="mapUnderscoreToCamelCase" value="true"/> </settings> </configuration> 无须将每个小配置单独导入，mapUnderscoreToCamelCase 是把 db CITY_CODE_CN 的下划线字段和 java 实体 bean 的驼峰标识相互转化。Spring 上下文配置文件 bdp-applicationContext.xml：[html] view plain copy print?<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: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-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/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">  <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list>  <value>classpath:jdbc.properties</value>  </list> </property> </bean> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource " destroy-method="close"> <property name="driverClass" value="com.mysql.jdbc.Driver" /> <property name="jdbcUrl" value="jdbc:mysql://${jdbc.host}:${jdbc.port}/${jdbc.database}?useUnicode=true&characterEncoding=utf8" /> <property name="user" value="${jdbc.username}" /> <property name="passWord" value="${jdbc.password}" /> <property name="acquireIncrement" value="1" /> <property name="initialPoolSize" value="5" /> <property name="maxPoolSize" value="20" /> <property name="minPoolSize" value="5" /> <property name="maxStatements" value="100" /> <property name="testConnectionOnCheckout" value="true" /> </bean> <bean id="sqlsessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <property name="configLocation" value="/WEB-INF/classes/mybatis-config.xml" /> </bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.defonds.bdp.*.mapper"/> </bean>   <context:component-scan base-package="com.defonds.bdp.*.service" />  <context:annotation-config />  <tx:annotation-driven transaction-manager="transactionManager" /> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean>  </beans> Spring MVC 配置文件 bdpmvc-servlet.xml：[html] view plain copy print?<?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" 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">  <context:component-scan base-package="com.defonds.bdp.*.controller" />   <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean>   <bean id="mappingJacksonHttpMessageConverter" class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> <property name="supportedMediaTypes"> <list> <value>application/json;charset=UTF-8</value> </list> </property> </bean> <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"> <property name="messageConverters"> <list> <ref bean="mappingJacksonHttpMessageConverter"/> </list> </property> </bean>  </beans> 将所有 Spring 配置文件注册到 web.xml：[html] view plain copy print?<?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" id="WebApp_ID" version="3.0"> <display-name>bdp</display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <context-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/classes/*-applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <servlet> <servlet-name>bdpmvc</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/classes/*-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>bdpmvc</servlet-name> <url-pattern>*.json</url-pattern> <url-pattern>*.html</url-pattern> </servlet-mapping> </web-app> 数据库连接配置文件 jdbc.properties：[plain] view plain copy print?jdbc.host=192.168.1.30 jdbc.database=bdpdb jdbc.port=3306 jdbc.username=bdpdev jdbc.password=xqder798 log4j 配置文件 log4j.properties：[plain] view plain copy print?# Global logging configuration log4j.rootLogger=WARN,stdout log4j.logger.com.defonds=DEBUG log4j.rootLogger=WARN,stdout # Console output... log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss} %-5p %c:%L - %m%n 测试用 mapper 文件 com.defonds.bdp.city.mapper.CityMapper.java：[java] view plain copy print?/** * File Name：CityMapper.java * * Copyright Defonds Corporation 2015 * All Rights Reserved * */ package com.defonds.bdp.city.mapper; import com.defonds.bdp.city.bean.City; /** * * Project Name：bdp * Type Name：CityMapper * Type Description： * Author：Defonds * Create Date：2015-08-31 * @version * */ public interface CityMapper { public void insertCity(City city); } 服务层处理类 com.defonds.bdp.city.service.CityService.java：[java] view plain copy print?/** * File Name：CityService.java * * Copyright Defonds Corporation 2015 * All Rights Reserved * */ package com.defonds.bdp.city.service; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.transaction.annotation.Propagation; import org.springframework.transaction.annotation.Transactional; import com.defonds.bdp.city.bean.City; import com.defonds.bdp.city.mapper.CityMapper; /** * * Project Name：bdp * Type Name：CityService * Type Description： * Author：Defonds * Create Date：2015-08-31 * @version * */ @Service @Transactional(propagation=Propagation.REQUIRED, rollbackFor=Exception.class) public class CityService { private final Log logger = LogFactory.getLog(this.getClass()); @Autowired private CityMapper cityMapper; public void insertCity() { City city = new City(); city.setCityCode("1100"); city.setCityJb("1"); city.setProvinceCode("1100"); city.setCityName("天津市"); city.setCity("天津市"); city.setProvince("天津市"); logger.debug("before insert the first city"); cityMapper.insertCity(city); logger.debug("after insert the first city, and before insert the second city"); cityMapper.insertCity(new City()); // this will throw an exception logger.debug("after insert the second city"); } } 最后的是 mvc controller 文件 com.defonds.bdp.city.controller.CityController.java：[java] view plain copy print?/** * File Name：CityController.java * * Copyright Defonds Corporation 2015 * All Rights Reserved * */ package com.defonds.bdp.city.controller; import java.util.ArrayList; import java.util.List; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.servlet.ModelAndView; import com.defonds.bdp.city.bean.City; import com.defonds.bdp.city.service.CityService; /** * * Project Name：bdp * Type Name：CityController * Type Description： * Author：Defonds * Create Date：2015-08-27 * @version * */ @Controller @RequestMapping("/city") public class CityController { private final Log logger = LogFactory.getLog(this.getClass()); @Autowired private CityService cityService; @RequestMapping("/welcome") public ModelAndView helloWorld() { String message = "<br><div style='text-align:center;'>" + "<h3>********** Hello World, Spring MVC Tutorial</h3>This message is coming from CityController.java **********</div><br><br>"; return new ModelAndView("welcome", "message", message); } /** * provinceCities(这里用一句话描述这个方法的作用) * TODO(这里描述这个方法适用条件 – 可选) * TODO(这里描述这个方法的执行流程 – 可选) * TODO(这里描述这个方法的使用方法 – 可选) * TODO(这里描述这个方法的注意事项 – 可选) * @param name * @param @return 设定文件 * @return String DOM对象 * @Exception 异常对象 * @since CodingExample　Ver(编码范例查看) 1.0.0 */ @RequestMapping("/province/cities") @ResponseBody public Object provinceCities() { List<City> list = new ArrayList<City>(); City city1 = new City(); city1.setId("126"); city1.setCity("济南市"); city1.setCityCode("4510"); city1.setCityJb("省级"); city1.setCityName("济南市"); city1.setProvince("山东省"); list.add(city1); City city2 = new City(); city2.setId("127"); city2.setCity("济南市"); city2.setCityCode("4510"); city2.setCityJb("县级"); city2.setCityName("商河县"); city2.setProvince("山东省"); list.add(city2); return list; } @RequestMapping("/create") @ResponseBody public Integer create() { try { this.cityService.insertCity(); return 1; } catch (Exception e) { logger.error(e); } return 0; } } 我们来看一下我们的 dbp 项目结构： dbp 项目结构.png

事务测试

访问事务测试页面如下：访问事务测试页面.png

控制台打印日志：2015-08-31 18:29:13 DEBUG com.defonds.bdp.city.service.CityService:45 - before insert the first city2015-08-31 18:29:13 DEBUG com.defonds.bdp.city.mapper.CityMapper.insertCity:54 - ==> Preparing: insert into city_code_cn (city_code, city_jb, province_code, city_name, city, province) values ( ?, ?, ?, ?, ?, ? ) 2015-08-31 18:29:13 DEBUG com.defonds.bdp.city.mapper.CityMapper.insertCity:54 - ==> Parameters: 1100(String), 1(String), 1100(String), 天津市(String), 天津市(String), 天津市(String)2015-08-31 18:29:13 DEBUG com.defonds.bdp.city.mapper.CityMapper.insertCity:54 - <== Updates: 12015-08-31 18:29:13 DEBUG com.defonds.bdp.city.service.CityService:47 - after insert the first city, and before insert the second city2015-08-31 18:29:13 DEBUG com.defonds.bdp.city.mapper.CityMapper.insertCity:54 - ==> Preparing: insert into city_code_cn (city_code, city_jb, province_code, city_name, city, province) values ( ?, ?, ?, ?, ?, ? ) 2015-08-31 18:29:13 DEBUG com.defonds.bdp.city.mapper.CityMapper.insertCity:54 - ==> Parameters: null, null, null, null, null, null2015-08-31 18:29:13 ERROR com.defonds.bdp.city.controller.CityController:97 - org.springframework.dao.DataIntegrityViolationException: ### Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'CITY_CODE' cannot be null### The error may involve com.defonds.bdp.city.mapper.CityMapper.insertCity-Inline### The error occurred while setting parameters### SQL: insert into city_code_cn (city_code, city_jb, province_code, city_name, city, province) values ( ?, ?, ?, ?, ?, ? )### Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'CITY_CODE' cannot be null; SQL []; Column 'CITY_CODE' cannot be null; nested exception is com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'CITY_CODE' cannot be null查看 db 的 CITY_CODE_CN 表，没有新记录插入，spring 4 + mybatis 3 成功。

源码下载

本文侧重讲 spring ioc、orm 和 mybatis 的事务集成，有评论问关于 spring mvc 的相关配置，请参考另一篇专门讲 spring mvc 搭建的博客《零基础搭建 spring mvc 4 项目(本文基于 Servlet 3.0)》，本文就是在该文基础上进行进一步添加了 service 和 dao 层的扩展而已。本文示例项目源码已共享到 CSDN 资源，有兴趣的朋友可以去下载下来参考：http://download.csdn.net/detail/defonds/9068147。

参考资料

http://edwin.baculsoft.com/2015/01/a-simple-spring-4-and-mybatis-transaction-example/http://zhaozhiming.github.io/blog/2014/11/15/spring4-and-mybatis/

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