整合 spring 4(包括mvc、context、orm) + mybatis 3 示例
作者各必备工具的版本如下：
测试用表 CITY_CODE_CN：
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：
表 CITY_CODE_CN 映射到的 java 文件 com.defonds.bdp.city.bean.City.java：
处理所有 MyBatis 的配置文件的配置文件 mybatis-config.xml：
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：
Spring MVC 配置文件 bdpmvc-servlet.xml：
将所有 Spring 配置文件注册到 web.xml：
数据库连接配置文件 jdbc.properties：
log4j 配置文件 log4j.properties：
测试用 mapper 文件 com.defonds.bdp.city.mapper.CityMapper.java：
服务层处理类 com.defonds.bdp.city.service.CityService.java：
最后的是 mvc controller 文件 com.defonds.bdp.city.controller.CityController.java：
我们来看一下我们的 dbp 项目结构：
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 city
2015-08-31 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: 1
2015-08-31 18:29:13 DEBUG com.defonds.bdp.city.service.CityService:47 - after insert the first city, and before insert the second city
2015-08-31 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, null
2015-08-31 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。
- 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：<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>
<!-- spring mvc related.....start --> <!-- TODO: replace jackson with fastjson -->
<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>
<!-- spring mvc related.....end -->
<!-- mybatis orm related.....start -->
<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>
<!-- mybatis orm related.....end -->
<!-- project log related.....start -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!-- project log related.....end -->
</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：
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：
<?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：
/**
* 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：
<?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：
<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">
<!-- mybatis related... start -->
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<!-- 这里支持多种寻址方式：classpath和file -->
<value>classpath:jdbc.properties</value>
<!-- 推荐使用file的方式引入，这样可以将配置和代码分离 -->
</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>
<!-- mybatis related... end -->
<!-- class annotation related... start -->
<context:component-scan base-package="com.defonds.bdp.*.service" />
<!-- class annotation related... end -->
<context:annotation-config />
<!-- transaction config related... start -->
<tx:annotation-driven transaction-manager="transactionManager" />
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- transaction config related... end -->
</beans>
Spring MVC 配置文件 bdpmvc-servlet.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"
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">
<!-- class annotation related... start -->
<context:component-scan base-package="com.defonds.bdp.*.controller" />
<!-- class annotation related... end -->
<!-- jsp page related... start -->
<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>
<!-- jsp page related... end -->
<!-- rest json related... start -->
<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>
<!-- rest json related... end -->
</beans>
将所有 Spring 配置文件注册到 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" 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：
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：
# 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：
/**
* 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：
/**
* 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：
/**
* 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：
事务测试
访问事务测试页面如下：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 city
2015-08-31 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: 1
2015-08-31 18:29:13 DEBUG com.defonds.bdp.city.service.CityService:47 - after insert the first city, and before insert the second city
2015-08-31 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, null
2015-08-31 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/