【Java】SpringMVC整合mybatis 連線池c3p0和druid分別實驗
阿新 • • 發佈：2019-01-01
1.pom.xml
Spring框架包 mybatis包 AOP包 aspectj包 aopalliance包
<!-- mysql start -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.6</version>
</dependency>
<!-- mysql end -->
<!-- 連線池 支援oracle mysql--> 2.web.xml:
<!-- druid -->
<servlet>
<servlet-name>DruidStatView</servlet-name>
<servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>DruidStatView</servlet-name>
<url-pattern>/druid/*</url-pattern>
</servlet-mapping>3.application.properties
jdbc.mysql.driverClass=com.mysql.jdbc.Driver
jdbc.mysql.jdbcUrl=jdbc:mysql://127.0.0.1:3306/mybatis
jdbc.mysql.user=xxxxx
jdbc.mysql.password=xxxxxx
jdbc.mysql.maxPoolSize=20
jdbc.mysql.maxIdleTIme=1000
jdbc.mysql.minPoolSize=6
jdbc.mysql.initalPoolSize=54.applicationContext.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:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:cache="http://www.springframework.org/schema/cache"
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/tx
http://www.springframework.org/schema/tx/spring-tx-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/cache
http://www.springframework.org/schema/cache/spring-cache-4.0.xsd">
<context:property-placeholder location="classpath:application.properties" />
<context:annotation-config />
<!-- 使用annotation 自動註冊bean,並保證@Required,@Autowired,@Resource的屬性被注入 -->
<context:component-scan base-package="com.naton" />
<import resource="spring-mysql.xml"/>
<import resource="spring-aop.xml"/>
<!-- 多檔案上傳 -->
<!-- <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/> -->
<bean class="org.springframework.context.annotation.CommonAnnotationBeanPostProcessor" />
</beans>5.spring-aop.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:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.2.xsd
">
<!-- spring aop -->
<aop:aspectj-autoproxy />
</beans>6.spring-mysql.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mybatis="http://mybatis.org/schema/mybatis-spring"
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.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd
http://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring.xsd">
<!-- 開啟註解 -->
<context:annotation-config />
<!-- 一、使用資料庫連線池註冊資料來源,引入相關的配置檔案 暫時用c3p0 -->
<import resource="c3p0.xml"/>
<!-- 二、建立mybatis會話工廠 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="cpdataSource" />
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
</bean>
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="cpdataSource" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
<!-- 三、建立mybatis會話template -->
<bean id="sqlSessionTemplate" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="0" ref="sqlSessionFactory"></constructor-arg>
</bean>
<!-- 註冊介面類的bean，使得程式中可以用註解方式獲取 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.naton.dao" />
</bean>
</beans>7.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>
<mappers>
<mapper resource="com/naton/dao/mapper/UserMapper.xml"/>
</mappers>
</configuration>8.c3p0.xml配置
<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 一、使用c3p0連線池註冊資料來源 -->
<bean id="cpdataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!-- 基礎配置 -->
<property name="jdbcUrl" value="${jdbc.mysql.jdbcUrl}"></property>
<property name="driverClass" value="${jdbc.mysql.driverClass}"></property>
<property name="user" value="${jdbc.mysql.user}"></property>
<property name="password" value="${jdbc.mysql.password}"></property>
<!-- 關鍵配置 -->
<!--初始化時獲取三個連線，取值應在minPoolSize與maxPoolSize之間。Default: 3 -->
<property name="initialPoolSize" value="3"></property>
<!--連線池中保留的最小連線數。Default: 2 -->
<property name="minPoolSize" value="2"></property>
<!--連線池中保留的最大連線數。Default: 15 -->
<property name="maxPoolSize" value="15"></property>
<!--當連線池中的連線耗盡的時候c3p0一次同時獲取的連線數。Default: 3 -->
<property name="acquireIncrement" value="3"></property>
<!-- 效能配置 -->
<!-- 控制資料來源內載入的PreparedStatements數量。如果maxStatements與maxStatementsPerConnection均為0，則快取被關閉。Default: 0 -->
<property name="maxStatements" value="8"></property>
<!-- maxStatementsPerConnection定義了連線池內單個連線所擁有的最大快取statements數。Default: 0 -->
<property name="maxStatementsPerConnection" value="5"></property>
<!--最大空閒時間,1800秒內未使用則連線被丟棄。若為0則永不丟棄。Default: 0 -->
<property name="maxIdleTime" value="1800"></property>
</bean>
</beans>9.實驗過程：
package com.naton.controller;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
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 com.naton.dao.UserMapper;
import com.naton.pojo.po.User;
import com.naton.service.TxTestService;
@Controller
public class MybatisController {
@Autowired
TxTestService txTestService;
@RequestMapping(value = "/mybatis/text")
@ResponseBody
public String text(HttpServletRequest request) {
return "{\"what\":\"hi\"}";
}
@RequestMapping(value = "/mybatis/InsertTest")
@ResponseBody
public String test(HttpServletRequest request) {
txTestService.insert();
return "";
}
}
package com.naton.service;
import java.util.UUID;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.naton.dao.UserMapper;
import com.naton.pojo.po.User;
@Transactional
@Service
public class TxTestService {
@Autowired
UserMapper userMapper;
public void insert() {
for (int i = 0; i < 100; i++) {
User u = new User();
u.setUsername(UUID.randomUUID().toString());
u.setPassword(UUID.randomUUID().toString());
userMapper.insert(u);
}
throw new RuntimeException();
}
}UserMapper.java、 User.java、UserMapper.xml都是通過之前介紹的工具生成好的http://blog.csdn.net/jack_eusong/article/details/78537125
//UserMapper.java
package com.naton.dao;
import org.springframework.stereotype.Service;
import com.naton.pojo.po.User;
@Service
public interface UserMapper {
int deleteByPrimaryKey(Integer id);
int insert(User record);
int insertSelective(User record);
User selectByPrimaryKey(Integer id);
int updateByPrimaryKeySelective(User record);
int updateByPrimaryKey(User record);
}
package com.naton.pojo.po;
//User.java
public class User {
private Integer id;
private String username;
private String password;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username == null ? null : username.trim();
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password == null ? null : password.trim();
}
}
//UserMapper.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.naton.dao.UserMapper" >
<resultMap id="BaseResultMap" type="com.naton.pojo.po.User" >
<id column="ID" property="id" jdbcType="INTEGER" />
<result column="username" property="username" jdbcType="VARCHAR" />
<result column="password" property="password" jdbcType="VARCHAR" />
</resultMap>
<sql id="Base_Column_List" >
ID, username, password
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from tb_user
where ID = #{id,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from tb_user
where ID = #{id,jdbcType=INTEGER}
</delete>
<insert id="insert" parameterType="com.naton.pojo.po.User" >
insert into tb_user (ID, username, password
)
values (#{id,jdbcType=INTEGER}, #{username,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}
)
</insert>
<insert id="insertSelective" parameterType="com.naton.pojo.po.User" >
insert into tb_user
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="id != null" >
ID,
</if>
<if test="username != null" >
username,
</if>
<if test="password != null" >
password,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="id != null" >
#{id,jdbcType=INTEGER},
</if>
<if test="username != null" >
#{username,jdbcType=VARCHAR},
</if>
<if test="password != null" >
#{password,jdbcType=VARCHAR},
</if>
</trim>
</insert>
<update id="updateByPrimaryKeySelective" parameterType="com.naton.pojo.po.User" >
update tb_user
<set >
<if test="username != null" >
username = #{username,jdbcType=VARCHAR},
</if>
<if test="password != null" >
password = #{password,jdbcType=VARCHAR},
</if>
</set>
where ID = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="com.naton.pojo.po.User" >
update tb_user
set username = #{username,jdbcType=VARCHAR},
password = #{password,jdbcType=VARCHAR}
where ID = #{id,jdbcType=INTEGER}
</update>
</mapper>- 啟動程式，訪問http://localhost:8080/mybatis/InsertTest，執行後，到資料庫中看了一下，確實插入了100條資料。整合完成。
11.實驗druid部分
druid.xml 注意druid 的id與之前c3p0中的id是一樣的，主要是為了快速切換，少改東西。
<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
<!-- 一、使用druid資料庫連線池註冊資料來源 -->
<bean id="cpdataSource" class="com.alibaba.druid.pool.DruidDataSource">
<!-- 基礎配置 -->
<property name="url" value="${jdbc.mysql.jdbcUrl}"></property>
<property name="driverClassName" value="${jdbc.mysql.driverClass}"></property>
<property name="username" value="${jdbc.mysql.user}"></property>
<property name="password" value="${jdbc.mysql.password}"></property>
<!-- 關鍵配置 -->
<!-- 初始化時建立物理連線的個數。初始化發生在顯示呼叫init方法，或者第一次getConnection時 -->
<property name="initialSize" value="3" />
<!-- 最小連線池數量 -->
<property name="minIdle" value="2" />
<!-- 最大連線池數量 -->
<property name="maxActive" value="15" />
<!-- 配置獲取連線等待超時的時間 -->
<property name="maxWait" value="10000" />
<!-- 效能配置 -->
<!-- 開啟PSCache，並且指定每個連線上PSCache的大小 -->
<property name="poolPreparedStatements" value="true" />
<property name="maxPoolPreparedStatementPerConnectionSize" value="20" />
<!-- 其他配置 -->
<!-- 配置間隔多久才進行一次檢測，檢測需要關閉的空閒連線，單位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis"