github上有一个Mybatis-Spring的项目，专门用于辅助完成mybatis与spring的整合，大大简化了整合难度，使用步骤：
准备工作：
maven依赖项：
1 <properties>
2 <java-version>1.6</java-version>
3 <spring.version>3.2.8.RELEASE</spring.version>
4 </properties>
5 <dependencies>
6
7 <!-- Spring -->
8 <dependency>
9 <groupId>org.springframework</groupId>
10 <artifactId>spring-core</artifactId>
11 <version>${spring.version}</version>
12 </dependency>
13
14 <dependency>
15 <groupId>org.springframework</groupId>
16 <artifactId>spring-expression</artifactId>
17 <version>${spring.version}</version>
18 </dependency>
19
20 <dependency>
21 <groupId>org.springframework</groupId>
22 <artifactId>spring-beans</artifactId>
23 <version>${spring.version}</version>
24 </dependency>
25
26 <dependency>
27 <groupId>org.springframework</groupId>
28 <artifactId>spring-context</artifactId>
29 <version>${spring.version}</version>
30 </dependency>
31 <dependency>
32 <groupId>org.springframework</groupId>
33 <artifactId>spring-context-support</artifactId>
34 <version>${spring.version}</version>
35 </dependency>
36 <dependency>
37 <groupId>org.springframework</groupId>
38 <artifactId>spring-web</artifactId>
39 <version>${spring.version}</version>
40 </dependency>
41
42 <dependency>
43 <groupId>org.springframework</groupId>
44 <artifactId>spring-webmvc</artifactId>
45 <version>${spring.version}</version>
46 </dependency>
47
48 <dependency>
49 <groupId>org.springframework</groupId>
50 <artifactId>spring-oxm</artifactId>
51 <version>${spring.version}</version>
52 </dependency>
53
54 <dependency>
55 <groupId>org.springframework</groupId>
56 <artifactId>spring-jdbc</artifactId>
57 <version>${spring.version}</version>
58 </dependency>
59
60 <dependency>
61 <groupId>org.springframework</groupId>
62 <artifactId>spring-tx</artifactId>
63 <version>${spring.version}</version>
64 </dependency>
65
66 <dependency>
67 <groupId>org.springframework</groupId>
68 <artifactId>spring-aop</artifactId>
69 <version>${spring.version}</version>
70 </dependency>
71
72
73 <dependency>
74 <groupId>org.aspectj</groupId>
75 <artifactId>aspectjweaver</artifactId>
76 <version>1.7.3</version>
77 </dependency>
78
79 <dependency>
80 <groupId>aopalliance</groupId>
81 <artifactId>aopalliance</artifactId>
82 <version>1.0</version>
83 </dependency>
84
85 <!-- json -->
86 <dependency>
87 <groupId>org.codehaus.jackson</groupId>
88 <artifactId>jackson-mapper-asl</artifactId>
89 <version>1.9.3</version>
90 </dependency>
91
92 <dependency>
93 <groupId>org.codehaus.jackson</groupId>
94 <artifactId>jackson-jaxrs</artifactId>
95 <version>1.9.9-redhat-2</version>
96 </dependency>
97
98 <!-- logback -->
99 <dependency>
100 <groupId>org.slf4j</groupId>
101 <artifactId>slf4j-api</artifactId>
102 <version>1.7.7</version>
103 </dependency>
104
105 <dependency>
106 <groupId>ch.qos.logback</groupId>
107 <artifactId>logback-core</artifactId>
108 <version>1.1.2</version>
109 </dependency>
110
111 <dependency>
112 <groupId>ch.qos.logback</groupId>
113 <artifactId>logback-classic</artifactId>
114 <version>1.1.2</version>
115 </dependency>
116
117 <dependency>
118 <groupId>commons-logging</groupId>
119 <artifactId>commons-logging</artifactId>
120 <version>1.1.3</version>
121 </dependency>
122
123 <!-- Servlet -->
124 <dependency>
125 <groupId>javax.servlet</groupId>
126 <artifactId>servlet-api</artifactId>
127 <version>2.5</version>
128 <scope>provided</scope>
129 </dependency>
130
131 <!-- oracle -->
132 <dependency>
133 <groupId>com.oracle</groupId>
134 <artifactId>ojdbc6</artifactId>
135 <version>11.2.0.3</version>
136 </dependency>
137
138 <!-- mybatis -->
139 <dependency>
140 <groupId>org.mybatis</groupId>
141 <artifactId>mybatis-spring</artifactId>
142 <version>1.2.2</version>
143 </dependency>
144
145 <dependency>
146 <groupId>org.mybatis</groupId>
147 <artifactId>mybatis</artifactId>
148 <version>3.2.7</version>
149 </dependency>
150
151
152 </dependencies>
一、先创建entity类
1 package com.cnblogs.yjmyzz.entity;
2
3 import java.io.Serializable;
4
5 public class BasCarrierEntity implements Serializable {
6
7 private static final long serialVersionUID = -971818065984481747L;
8
9 private int recId;
10 private int cyear;
11 private String carrier;
12
13 public int getRecId() {
14 return recId;
15 }
16
17 public void setRecId(int recId) {
18 this.recId = recId;
19 }
20
21 public int getCyear() {
22 return cyear;
23 }
24
25 public void setCyear(int cyear) {
26 this.cyear = cyear;
27 }
28
29 public String getCarrier() {
30 return carrier;
31 }
32
33 public void setCarrier(String carrier) {
34 this.carrier = carrier;
35 }
36
37 public String toString() {
38 return "recid:" + recId + ",cyear:" + cyear + ",carrier:" + carrier;
39 }
40
41 }
这是一个POJO类，没有任何花头.
二、创建Mapper接口
1 package com.cnblogs.yjmyzz.mybatis.mapper;
2
3 import com.cnblogs.yjmyzz.entity.BasCarrierEntity;
4
5 public interface CarrierMapper {
6
7 BasCarrierEntity getCarrierById(int recId);
8
9 void insertCarrier(BasCarrierEntity entity);
10
11 void deleteCarrier(BasCarrierEntity entity);
12
13 }
相当于传统ORM数据库应用里的DAO层接口
三、定义sql映射文件 BasCarrier.xml
1 <?xml version="1.0" encoding="UTF-8"?>
2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
3 "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
4
5 <mapper namespace="com.cnblogs.yjmyzz.mybatis.mapper.CarrierMapper">
6
7 <cache />
8
9 <select id="getCarrierById" resultType="BasCarrierEntity"
10 parameterType="int">
11 select t.recid recId,t.cyear cyear,t.carrier carrier
12 from T_BAS_CARRIER t where
13 t.recid = #{recId}
14 </select>
15
16 <insert id="insertCarrier" parameterType="BasCarrierEntity">
17 <selectKey keyProperty="recId" order="BEFORE" resultType="int">
18 select seq_t_bas_carrier.nextval as recId from dual
19 </selectKey>
20 insert into
21 t_bas_carrier(recid,cyear,carrier)
22 values(#{recId},#{cyear},#{carrier})
23 </insert>
24
25 <insert id="deleteCarrier" parameterType="BasCarrierEntity">
26 delete from
27 t_bas_carrier where 1=1
28 <if test="carrier != null">
29 and carrier like #{carrier}
30 </if>
31 </insert>
32
33 </mapper>
以上这三板斧是必不可少的，注：xml中sql语句的id要与mapper接口中的方法名完全相同，这样不用其它任何额外配置，运行时，mybatis就能自动将接口中的方法与sql关联起来。
四、Spring-Database.xml 配置文件
1 <?xml version="1.0" encoding="UTF-8"?>
2 <beans xmlns="http://www.springframework.org/schema/beans"
3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
4 xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
5 xmlns:context="http://www.springframework.org/schema/context"
6 xsi:schemaLocation="
7 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
8 http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
9 http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
10 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
11 http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"
12 default-autowire="byName">
13
14 <bean id="dataSource"
15 class="org.springframework.jdbc.datasource.DriverManagerDataSource">
16 <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
17 <property name="url" value="${db-url}" />
18 <property name="username" value="${db-username}" />
19 <property name="password" value="${db-password}" />
20 </bean>
21
22 <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
23 <!-- mybatis主配置文件，不能与后面的mapperLocations/typeAliasesPackage同时使用 -->
24 <!-- <property name="configLocation" value="classpath:mybatis-config.xml"></property> -->
25 <property name="dataSource" ref="dataSource" />
26 <!-- mapper中的类型别名 -->
27 <property name="typeAliasesPackage" value="com.cnblogs.yjmyzz.entity"></property>
28 <!-- mybatis 映射sql xml路径 -->
29 <property name="mapperLocations" value="classpath:mybatis/**/*.xml"></property>
30 </bean>
31
32 <!-- 扫描指定包下的Mapper，自动创建mapper bean实例 -->
33 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
34 <property name="basePackage" value="com.cnblogs.yjmyzz.mybatis.mapper" />
35 </bean>
36
37 <!-- 事务管理 -->
38 <bean id="transactionManager"
39 class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
40 <property name="dataSource" ref="dataSource" />
41 </bean>
42
43 <tx:advice id="txAdvice" transaction-manager="transactionManager">
44 <tx:attributes>
45 <!-- 仅do开头的Service层方法，发生Exception异常时，才会事务回滚 -->
46 <tx:method name="do*" read-only="false" rollback-for="java.lang.Exception" />
47 <!-- 其它方法，只读事务，不回滚 -->
48 <tx:method name="*" propagation="SUPPORTS" read-only="true" />
49 </tx:attributes>
50 </tx:advice>
51
52 <aop:config>
53 <!-- 仅拦截service层方法 -->
54 <aop:pointcut id="pc"
55 expression="execution(* com.cnblogs.yjmyzz.service..*.*(..))" />
56 <aop:advisor pointcut-ref="pc" advice-ref="txAdvice" />
57 </aop:config>
58
59 <!-- <tx:annotation-driven /> -->
60 </beans>
真正属于mybatis专用的配置是22-35行，其它都是些db开发的常规配置。
事务这里有一个要特别注意的问题：因为Spring/SpringMVC的父子容器问题，默认情况下@Service的xxxService并不具备增加事务处理能力，需要做点特殊配置
a) spring-mvc servlet的配置文件里，参考下面配置：
1 <context:component-scan base-package="com.cnblogs.yjmyzz"> 2 <context:exclude-filter type="annotation" 3 expression="org.springframework.stereotype.Service" /> 4 </context:component-scan>
即：将@Service所对应的Service类排除掉，因为Spring-MVC compent-scan注入的只是普通的bean，不具备增加事务处理能力，所以要排除掉.
b) spring 主配置文件里，参考下面配置：
<context:component-scan base-package="com.cnblogs.yjmyzz">
</context:component-scan>
这样处理后，compent-scan扫描到的Service类，就交由Spring，而非Spring-MVC来注入了。
另外还有一个事务自动提交的问题，虽然在配置中已经明确指定了仅Service层do开头的方法，才支持可写事务，其它方法都是只读事务，但如果你运行一下会发现，其它非do开头的方法如果执行一条insert语句，仍然会提交成功。
造成这个的原因不在于datasource，这里我们采用的是org.springframework.jdbc.datasource.DriverManagerDataSource数据源，这种数据源不支持defaultAutoCommit属性，如果不想使用自动提交，可以把datasource节点换成
1 <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
2 destroy-method="close">
3 <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
4 <property name="url" value="${db-url}" />
5 <property name="username" value="${db-username}" />
6 <property name="password" value="${db-password}" />
7 <property name="defaultAutoCommit" value="false" />
8 <property name="initialSize" value="2" />
9 <property name="maxActive" value="5" />
10 <property name="maxWait" value="60000" />
11 </bean>
注意第7行，defaultAutoCommit设置成false即可
如果使用Oracle，事务这里还有一个小坑，read-only不管设置成true/false，效果都是一样的，原因见：http://docs.oracle.com/cd/B19306_01/java.102/b14355/apxtips.htm
Transaction Isolation Levels and Access Modes
Read-only connections are supported by the Oracle server, but not by the Oracle JDBC drivers.
即：使用oracle jdbc驱动时，不支持read-only属性
五、mybatis在eclipse控制台显示sql语句的问题
mybatis支持多种日志组件，默认顺序如下：
• SLF4J
• Apache Commons Logging
• Log4j 2
• Log4j
• JDK logging
而上一篇刚学习的logback组件，正好是SLF4J的实现之一，所以如果采用logback来记录日志，mybatis不用做任何额外配置，将logback.xml扔在resource目录下即可
1 <?xml version="1.0" encoding="UTF-8" ?>
2 <configuration scan="true" scanPeriod="1800 seconds"
3 debug="false">
4
5 <property name="USER_HOME" value="logs" />
6 <property scope="context" name="FILE_NAME" value="mybatis-logback" />
7
8 <timestamp key="byDay" datePattern="yyyy-MM-dd" />
9
10 <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
11 <encoder>
12 <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
13 </pattern>
14 </encoder>
15 </appender>
16
17 <appender name="file"
18 class="ch.qos.logback.core.rolling.RollingFileAppender">
19 <file>${USER_HOME}/${FILE_NAME}.log</file>
20
21 <rollingPolicy class="ch.qos.logback.core.rolling.FixedWindowRollingPolicy">
22 <fileNamePattern>${USER_HOME}/${byDay}/${FILE_NAME}-${byDay}-%i.log.zip
23 </fileNamePattern>
24 <minIndex>1</minIndex>
25 <maxIndex>10</maxIndex>
26 </rollingPolicy>
27
28 <triggeringPolicy
29 class="ch.qos.logback.core.rolling.SizeBasedTriggeringPolicy">
30 <maxFileSize>5MB</maxFileSize>
31 </triggeringPolicy>
32 <encoder>
33 <pattern>%-4relative [%thread] %-5level %logger{35} - %msg%n
34 </pattern>
35 </encoder>
36
37 </appender>
38
39 <logger name="com.cnblogs.yjmyzz" level="debug" additivity="true">
40 <appender-ref ref="file" />
41 <!-- <appender-ref ref="STDOUT" /> -->
42 </logger>
43
44 <root level="debug">
45 <appender-ref ref="STDOUT" />
46 </root>
47 </configuration>
注：log的level要设置成DEBUG。
logback与spring mvc整合的方法，上一篇已经讲过，就不再重复了，这里只给出web.xml的配置
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> 5 <context-param> 6 <param-name>logbackConfigLocation</param-name> 7 <param-value>classpath:logback.xml</param-value> 8 </context-param> 9 <listener> 10 <listener-class>com.cnblogs.yjmyzz.util.LogbackConfigListener</listener-class> 11 </listener> 12 13 <context-param> 14 <param-name>contextConfigLocation</param-name> 15 <param-value>classpath:root-context.xml</param-value> 16 </context-param> 17 <filter> 18 <filter-name>CharacterEncodingFilter</filter-name> 19 <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> 20 <init-param> 21 <param-name>encoding</param-name> 22 <param-value>utf-8</param-value> 23 </init-param> 24 </filter> 25 <filter-mapping> 26 <filter-name>CharacterEncodingFilter</filter-name> 27 <url-pattern>/*</url-pattern> 28 </filter-mapping> 29 <listener> 30 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 31 </listener> 32 <servlet> 33 <servlet-name>appServlet</servlet-name> 34 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 35 <init-param> 36 <param-name>contextConfigLocation</param-name> 37 <param-value>classpath:servlet-context.xml</param-value> 38 </init-param> 39 <load-on-startup>0</load-on-startup> 40 </servlet> 41 <servlet-mapping> 42 <servlet-name>appServlet</servlet-name> 43 <url-pattern>/</url-pattern> 44 </servlet-mapping> 45 46 </web-app>
示例源码：Spring-MVC-REST-MyBatis.zip
时间： 2024-11-05 18:35:22