接手的项目发现，得需要用mybatis连接本地数据库，根据本地数据库表创建sql语句。上一遍讲过mybatis的使用，本篇主要讲mybatis的配置，如下所示：
一、创建数据库及表
本次是用的Mysql数据库，语句参考上篇MYSQL。
二、maven配置mybatis框架
用maven来管理所有的架包
<dependency>
<groupId>org.mybatis
</groupId>
<artifactId>mybatis
</artifactId>
<version>3.1.1
</version>
</dependency>
<dependency>
<groupId>org.mybatis
</groupId>
<artifactId>mybatis-spring
</artifactId>
<version>1.1.1
</version>
</dependency>
<dependency>
三、用maven来配置数据连接
在maven的配置文件pom.xml文件里编写。 在maven中配置数据连接，方便以后打包（具体为什么方便打包的细节我还是不太清楚）
<profiles>
<profile>
<id>dev
</id>
<properties>
<from_jdbc.url><？？？> </from_jdbc.url>
<from_jdbc.user>app
</from_jdbc.user>
<from_jdbc.password>h
</from_jdbc.password>
</profile>
</profiles>
四、编写jdbc.properties文件
jdbc.properties文件中变量值等于maven的配置文件pom.xml里的值。
from_jdbc
.url=${from_jdbc
.url}
from_jdbc
.user=${from_jdbc
.user}
from_jdbc
.password=${from_jdbc
.password}
五、配置spring.xml文件
//配置数据连接的读取路径
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<property name="url" value="${recommend_jdbc.url}" />
<property name="username" value="${recommend_jdbc.user}" />
<property name="password" value="${recommend_jdbc.password}" />
<property name="initialSize" value="10" />
<property name="minIdle" value="1" />
<property name="maxActive" value="10" />
<property name="maxWait" value="60000" />
<property name="timeBetweenEvictionRunsMillis" value="60000" />
<property name="minEvictableIdleTimeMillis" value="300000" />
<property name="validationQuery" value="SELECT 'x'" />
<property name="testWhileIdle" value="true" />
<property name="testOnBorrow" value="false" />
<property name="testOnReturn" value="false" />
<property name="poolPreparedStatements" value="false" />
<property name="removeAbandoned" value="true"/>
<property name="removeAbandonedTimeout" value="1800"/>
<property name="logAbandoned" value="true"/>
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/>
</beans>
<bean class="org.apache.ibatis.logging.LogFactory" init-method="useStdOutLogging"></bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="typeAliasesPackage" value="com.hiveview.entity" />
<property name="mapperLocations" value="classpath*:mapper/**/*.xml" />
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.hiveview.dao" />
</bean>
</beans>
五、创建上层调用接口
package com.hiveview.dao;
import java.util.List;
import org.springframework.stereotype.Repository;
@Repository
public interface BaseDao<T> {
public int save(T t);
public int delete(T t);
public T
get(T t);
public List<T>
getList(T t);
public int update(T t);
public int count(T t);
public List<T>
getPagin(T t);
public void insertAll(List<T> list);
}
六、创建Bean类
package com.hiveview.entity.copy;
import java.util.Date;
public class CopyBean {
private int id;
private String fromtable;
private String totable;
private String fromcolumns;
private String tocolumns;
private int effective;
private String executetime;
private int isupdate;
private String updatecolumn;
private String columntype;
private String fromdatasource;
public String
getColumntype() {
return columntype;
}
public void setColumntype(String columntype) {
this.columntype = columntype;
}
public int getId() {
return id;
}
public void setId(
int id) {
this.id = id;
}
public String
getFromtable() {
return fromtable;
}
public void setFromtable(String fromtable) {
this.fromtable = fromtable;
}
public String
getTotable() {
return totable;
}
public void setTotable(String totable) {
this.totable = totable;
}
public String
getFromcolumns() {
return fromcolumns;
}
public void setFromcolumns(String fromcolumns) {
this.fromcolumns = fromcolumns;
}
public String
getTocolumns() {
return tocolumns;
}
public void setTocolumns(String tocolumns) {
this.tocolumns = tocolumns;
}
public int getEffective() {
return effective;
}
public void setEffective(
int effective) {
this.effective = effective;
}
public String
getExecutetime() {
return executetime;
}
public void setExecutetime(String executetime) {
this.executetime = executetime;
}
public int getIsupdate() {
return isupdate;
}
public void setIsupdate(
int isupdate) {
this.isupdate = isupdate;
}
public String
getUpdatecolumn() {
return updatecolumn;
}
public void setUpdatecolumn(String updatecolumn) {
this.updatecolumn = updatecolumn;
}
public String
getFromdatasource() {
return fromdatasource;
}
public void setFromdatasource(String fromdatasource) {
this.fromdatasource = fromdatasource;
}
}
七、编写mapper.xml配置文件
<?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.hiveview.dao.copy.CopyDao">
<select id="getList" parameterType="com.hiveview.entity.copy.CopyBean"
resultType="com.hiveview.entity.copy.CopyBean">
select * from copy_table where 1=1
<if test="fromtable!=null and fromtable!=''">
and fromtable=#{fromtable}
</if>
</select>
<update id="update" parameterType="com.hiveview.entity.copy.CopyBean">
update copy_table set executetime=#{executetime}
</update>
</mapper>
