本文介绍如何使用Sharding-JDBC实现数据库的分库分表操作，包括创建数据库、项目搭建、配置文件、分库分表逻辑及测试等步骤。
转载请注明出处：http://blog.youkuaiyun.com/l1028386804/article/details/79368021
一、概述
之前，我们介绍了利用Mycat进行分库分表操作，Mycat分表操作是利用分库来进行的，单个库中的分表操作可结合MySQL的分区进行，这也是Mycat官方提倡的方式。那么，如何利用Mycat真正实现数据库的分库分表，可以私信我。今天，我们来看看sharding-jdbc，sharding-jdbc也是一款分库分表的“中间件”，不过，它并不向Mycat那样作为一个真正的中间件，它是一款以jar包的形式整合到业务中的插件，这就决定了它是轻量级的，用法也是十分简单的。
二、分库分表实战
1、创建数据库
首先我们创建相应的数据库
create database sharding_0;
create database sharding_1;这样我们就创建了两个数据库sharding_0和sharding_1;
接下来我们在两个库中创建相应的数据表，在两个库中分别进行如下SQL:
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for t_student_00
-- ----------------------------
DROP TABLE IF EXISTS `t_student_00`;
CREATE TABLE `t_student_00` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`student_id` int(11) NOT NULL,
`name` varchar(255) NOT NULL,
`age` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Table structure for t_student_01
-- ----------------------------
DROP TABLE IF EXISTS `t_student_01`;
CREATE TABLE `t_student_01` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`student_id` int(11) NOT NULL,
`name` varchar(255) NOT NULL,
`age` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Table structure for t_user_00
-- ----------------------------
DROP TABLE IF EXISTS `t_user_00`;
CREATE TABLE `t_user_00` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`user_id` int(11) NOT NULL,
`name` varchar(255) NOT NULL,
`age` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
-- ----------------------------
-- Table structure for t_user_01
-- ----------------------------
DROP TABLE IF EXISTS `t_user_01`;
CREATE TABLE `t_user_01` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`user_id` int(11) NOT NULL,
`name` varchar(255) NOT NULL,
`age` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8;
-- ----------------------------
-- Table structure for t_user_02
-- ----------------------------
DROP TABLE IF EXISTS `t_user_02`;
CREATE TABLE `t_user_02` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`user_id` int(11) NOT NULL,
`name` varchar(255) NOT NULL,
`age` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;
这样，我们的数据库就准备好了。
2、创建项目
接下来，我们就创建一个Maven项目，项目结构如下：
3、配置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>
<parent>
<groupId>dubbo-tcc</groupId>
<artifactId>tcc-parent</artifactId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>tcc-order</artifactId>
<packaging>war</packaging>
<dependencies>
<dependency>
<groupId>dubbo-tcc</groupId>
<artifactId>tcc-service-api</artifactId>
<version>0.0.1-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>org.mengyun</groupId>
<artifactId>tcc-transaction-spring</artifactId>
<version>1.2.4.23</version>
</dependency>
<dependency>
<groupId>org.mengyun</groupId>
<artifactId>tcc-transaction-dubbo</artifactId>
<version>1.2.4.23</version>
</dependency>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
</dependency>
<!-- dubbo相关 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>dubbo</artifactId>
<exclusions>
<exclusion>
<artifactId>spring</artifactId>
<groupId>org.springframework</groupId>
</exclusion>
<exclusion>
<artifactId>netty</artifactId>
<groupId>org.jboss.netty</groupId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
</dependency>
<dependency>
<groupId>com.github.sgroschupf</groupId>
<artifactId>zkclient</artifactId>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!-- MySql -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!-- 连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
<!-- JSP相关 -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>${jstl.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>${servlet-api.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jsp-api</artifactId>
<version>${jsp-api.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
</project>4、创建数据库映射类
这里，我们创建两个数据库映射类：User类和Student类。
4-1、User类
package com.th.sharding.entity;
import java.io.Serializable;
public class User implements Serializable {
private static final long serialVersionUID = 215524951712753197L;
private Integer id;
private Integer userId;
private String name;
private Integer age;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getUserId() {
return userId;
}
public void setUserId(Integer userId) {
this.userId = userId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "User [id=" + id + ", userId=" + userId + ", name=" + name + ", age=" + age + "]";
}
}
4-2、Student类
package com.th.sharding.entity;
import java.io.Serializable;
public class Student implements Serializable {
private static final long serialVersionUID = 4461939595448576648L;
private Integer id;
private Integer studentId;
private String name;
private Integer age;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public Integer getStudentId() {
return studentId;
}
public void setStudentId(Integer studentId) {
this.studentId = studentId;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
@Override
public String toString() {
return "Student [id=" + id + ", studentId=" + studentId + ", name=" + name + ", age=" + age + "]";
}
}
5、创建Mapper类
5-1、UserMapper类
package com.th.sharding.mapper;
import java.util.List;
import com.th.sharding.entity.User;
public interface UserMapper {
Integer insert(User u);
List<User> findAll();
List<User> findByUserIds(List<Integer> userIds);
}
5-2、StudentMapper类
package com.th.sharding.mapper;
import java.util.List;
import com.th.sharding.entity.Student;
public interface StudentMapper {
Integer insert(Student s);
List<Student> findAll();
List<Student> findByStudentIds(List<Integer> studentIds);
}
6、创建service类
6-1、UserService类
package com.th.sharding.service;
import java.util.List;
import com.th.sharding.entity.User;
public interface UserService {
public boolean insert(User u);
public List<User> findAll();
public List<User> findByUserIds(List<Integer> ids);
public void transactionTestSucess();
public void transactionTestFailure() throws IllegalAccessException;
}
6-2、StudentService类
package com.th.sharding.service;
import com.th.sharding.entity.Student;
public interface StudentService {
boolean insert(Student student);
}
7、创建service的实现类
7-1、UserServiceImpl类
package com.th.sharding.service.impl;
import java.util.List;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
import com.th.sharding.entity.Student;
import com.th.sharding.entity.User;
import com.th.sharding.mapper.StudentMapper;
import com.th.sharding.mapper.UserMapper;
import com.th.sharding.service.UserService;
@Service
public class UserServiceImpl implements UserService {
@Resource
public UserMapper userMapper;
@Resource
public StudentMapper studentMapper;
public boolean insert(User u) {
return userMapper.insert(u) > 0;
}
public List<User> findAll() {
return userMapper.findAll();
}
public List<User> findByUserIds(List<Integer> ids) {
return userMapper.findByUserIds(ids);
}
@Transactional(propagation = Propagation.REQUIRED)
public void transactionTestSucess() {
User u = new User();
u.setUserId(13);
u.setAge(25);
u.setName("war3 1.27");
userMapper.insert(u);
Student student = new Student();
student.setStudentId(21);
student.setAge(21);
student.setName("hehe");
studentMapper.insert(student);
}
@Transactional(propagation = Propagation.REQUIRED)
public void transactionTestFailure() throws IllegalAccessException {
User u = new User();
u.setUserId(13);
u.setAge(25);
u.setName("war3 1.27 good");
userMapper.insert(u);
Student student = new Student();
student.setStudentId(21);
student.setAge(21);
student.setName("hehe1");
studentMapper.insert(student);
throw new IllegalAccessException();
}
}
7-2、StudentServiceImpl类
package com.th.sharding.service.impl;
import javax.annotation.Resource;
import org.springframework.stereotype.Service;
import com.th.sharding.entity.Student;
import com.th.sharding.mapper.StudentMapper;
import com.th.sharding.service.StudentService;
@Service
public class StudentServiceImpl implements StudentService {
@Resource
public StudentMapper studentMapper;
public boolean insert(Student student) {
return studentMapper.insert(student) > 0;
}
}
8、创建分库逻辑
8-1、User分库逻辑UserSingleKeyDatabaseShardingAlgorithm类
package com.th.sharding.algorithm;
import java.util.Collection;
import java.util.LinkedHashSet;
import com.dangdang.ddframe.rdb.sharding.api.ShardingValue;
import com.dangdang.ddframe.rdb.sharding.api.strategy.database.SingleKeyDatabaseShardingAlgorithm;
import com.google.common.collect.Range;
public class UserSingleKeyDatabaseShardingAlgorithm implements SingleKeyDatabaseShardingAlgorithm<Integer> {
/**
* sql 中关键字 匹配符为 =的时候，表的路由函数
*/
public String doEqualSharding(Collection<String> availableTargetNames, ShardingValue<Integer> shardingValue) {
for (String each : availableTargetNames) {
if (each.endsWith(shardingValue.getValue() % 2 + "")) {
return each;
}
}
throw new IllegalArgumentException();
}
/**
* sql 中关键字 匹配符为 in 的时候，表的路由函数
*/
public Collection<String> doInSharding(Collection<String> availableTargetNames, ShardingValue<Integer> shardingValue) {
Collection<String> result = new LinkedHashSet<String>(availableTargetNames.size());
for (Integer value : shardingValue.getValues()) {
for (String tableName : availableTargetNames) {
if (tableName.endsWith(value % 2 + "")) {
result.add(tableName);
}
}
}
return result;
}
/**
* sql 中关键字 匹配符为 between的时候，表的路由函数
*/
public Collection<String> doBetweenSharding(Collection<String> availableTargetNames, ShardingValue<Integer> shardingValue) {
Collection<String> result = new LinkedHashSet<String>(availableTargetNames.size());
Range<Integer> range = (Range<Integer>) shardingValue.getValueRange();
for (Integer i = range.lowerEndpoint(); i <= range.upperEndpoint(); i++) {
for (String each : availableTargetNames) {
if (each.endsWith(i % 2 + "")) {
result.add(each);
}
}
}
return result;
}
}
8-2、Student分库逻辑StudentSingleKeyDatabaseShardingAlgorithm
package com.th.sharding.algorithm;
import java.util.Collection;
import java.util.LinkedHashSet;
import com.dangdang.ddframe.rdb.sharding.api.ShardingValue;
import com.dangdang.ddframe.rdb.sharding.api.strategy.database.SingleKeyDatabaseShardingAlgorithm;
import com.google.common.collect.Range;
public class StudentSingleKeyDatabaseShardingAlgorithm implements SingleKeyDatabaseShardingAlgorithm<Integer> {
/**
* sql 中关键字 匹配符为 =的时候，表的路由函数
*/
@Override
public String doEqualSharding(Collection<String> availableTargetNames, ShardingValue<Integer> shardingValue) {
for (String each : availableTargetNames) {
if (each.endsWith(shardingValue.getValue() % 2 + "")) {
return each;
}
}
throw new IllegalArgumentException();
}
/**
* sql 中关键字 匹配符为 in 的时候，表的路由函数
*/
@Override
public Collection<String> doInSharding(Collection<String> availableTargetNames, ShardingValue<Integer> shardingValue) {
Collection<String> result = new LinkedHashSet<String>(availableTargetNames.size());
for (Integer value : shardingValue.getValues()) {
for (String tableName : availableTargetNames) {
if (tableName.endsWith(value % 2 + "")) {
result.add(tableName);
}
}
}
return result;
}
/**
* sql 中关键字 匹配符为 between的时候，表的路由函数
*/
@Override
public Collection<String> doBetweenSharding(Collection<String> availableTargetNames, ShardingValue<Integer> shardingValue) {
Collection<String> result = new LinkedHashSet<String>(availableTargetNames.size());
Range<Integer> range = (Range<Integer>) shardingValue.getValueRange();
for (Integer i = range.lowerEndpoint(); i <= range.upperEndpoint(); i++) {
for (String each : availableTargetNames) {
if (each.endsWith(i % 2 + "")) {
result.add(each);
}
}
}
return result;
}
}
9、创建分表逻辑
9-1、User分表逻辑UserSingleKeyTableShardingAlgorithm
package com.th.sharding.algorithm;
import java.util.Collection;
import java.util.LinkedHashSet;
import com.dangdang.ddframe.rdb.sharding.api.ShardingValue;
import com.dangdang.ddframe.rdb.sharding.api.strategy.table.SingleKeyTableShardingAlgorithm;
import com.google.common.collect.Range;
public class UserSingleKeyTableShardingAlgorithm implements SingleKeyTableShardingAlgorithm<Integer> {
/**
* sql 中 = 操作时，table的映射
*/
public String doEqualSharding(Collection<String> tableNames, ShardingValue<Integer> shardingValue) {
for (String each : tableNames) {
if (each.endsWith(("0".concat(String.valueOf(shardingValue.getValue() % 3))))) {
return each;
}
}
throw new IllegalArgumentException();
}
/**
* sql 中 in 操作时，table的映射
*/
public Collection<String> doInSharding(Collection<String> tableNames, ShardingValue<Integer> shardingValue) {
Collection<String> result = new LinkedHashSet<String>(tableNames.size());
for (Integer value : shardingValue.getValues()) {
for (String tableName : tableNames) {
if (tableName.endsWith(("0".concat(String.valueOf(value % 3))))) {
result.add(tableName);
}
}
}
return result;
}
/**
* sql 中 between 操作时，table的映射
*/
public Collection<String> doBetweenSharding(Collection<String> tableNames, ShardingValue<Integer> shardingValue) {
Collection<String> result = new LinkedHashSet<String>(tableNames.size());
Range<Integer> range = (Range<Integer>) shardingValue.getValueRange();
for (Integer i = range.lowerEndpoint(); i <= range.upperEndpoint(); i++) {
for (String each : tableNames) {
if (each.endsWith(("0".concat(String.valueOf(i % 3))))) {
result.add(each);
}
}
}
return result;
}
}
9-2、创建Student分表逻辑StudentSingleKeyTableShardingAlgorithm
package com.th.sharding.algorithm;
import java.util.Collection;
import java.util.LinkedHashSet;
import com.dangdang.ddframe.rdb.sharding.api.ShardingValue;
import com.dangdang.ddframe.rdb.sharding.api.strategy.table.SingleKeyTableShardingAlgorithm;
import com.google.common.collect.Range;
public class StudentSingleKeyTableShardingAlgorithm implements SingleKeyTableShardingAlgorithm<Integer> {
/**
* sql 中 = 操作时，table的映射
*/
public String doEqualSharding(Collection<String> tableNames, ShardingValue<Integer> shardingValue) {
for (String each : tableNames) {
if (each.endsWith("0".concat(String.valueOf(shardingValue.getValue() % 2)))) {
return each;
}
}
throw new IllegalArgumentException();
}
/**
* sql 中 in 操作时，table的映射
*/
public Collection<String> doInSharding(Collection<String> tableNames, ShardingValue<Integer> shardingValue) {
Collection<String> result = new LinkedHashSet<String>(tableNames.size());
for (Integer value : shardingValue.getValues()) {
for (String tableName : tableNames) {
if (tableName.endsWith("0".concat(String.valueOf(value % 2)))) {
result.add(tableName);
}
}
}
return result;
}
/**
* sql 中 between 操作时，table的映射
*/
public Collection<String> doBetweenSharding(Collection<String> tableNames, ShardingValue<Integer> shardingValue) {
Collection<String> result = new LinkedHashSet<String>(tableNames.size());
Range<Integer> range = (Range<Integer>) shardingValue.getValueRange();
for (Integer i = range.lowerEndpoint(); i <= range.upperEndpoint(); i++) {
for (String each : tableNames) {
if (each.endsWith("0".concat(String.valueOf(i % 2)))) {
result.add(each);
}
}
}
return result;
}
}
10、创建Mapper.xml
10-1、创建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.th.sharding.mapper.UserMapper" >
<resultMap id="resultMap" type="com.th.sharding.entity.User" >
<id column="id" property="id" jdbcType="INTEGER" />
<result column="user_id" property="userId" jdbcType="INTEGER" />
<result column="name" property="name" jdbcType="VARCHAR" />
<result column="age" property="age" jdbcType="INTEGER" />
</resultMap>
<insert id="insert">
insert into t_user (user_id,name,age) values (#{userId},#{name},#{age})
</insert>
<select id="findAll" resultMap="resultMap">
select <include refid="columnsName"/> from t_user
</select>
<select id="findByUserIds" resultMap="resultMap">
select <include refid="columnsName"/> from t_user where user_id in (
<foreach collection="list" item="item" separator=",">
#{item}
</foreach>
)
</select>
<sql id="columnsName">
id,user_id,name,age
</sql>
</mapper>
10-2、创建StudentMapper.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.th.sharding.mapper.StudentMapper" >
<resultMap id="resultMap" type="com.th.sharding.entity.Student" >
<id column="id" property="id" jdbcType="INTEGER" />
<result column="student_id" property="studentId" jdbcType="INTEGER" />
<result column="name" property="name" jdbcType="VARCHAR" />
<result column="age" property="age" jdbcType="INTEGER" />
</resultMap>
<insert id="insert">
insert into t_student (student_id,name,age) values (#{studentId},#{name},#{age})
</insert>
<select id="findAll" resultMap="resultMap">
select <include refid="columnsName"/> from t_student
</select>
<select id="findByStudentIds" resultMap="resultMap">
select <include refid="columnsName"/> from t_student where student_id in (
<foreach collection="list" item="item" separator=",">
#{item}
</foreach>
)
</select>
<sql id="columnsName">
id,student_id,name,age
</sql>
</mapper>
11、创建jdbc_dev.properties
jdbc_driver0=com.mysql.cj.jdbc.Driver
jdbc_url0=jdbc:mysql://localhost:3306/sharding_0?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=GMT
jdbc_username0=root
jdbc_password0=123456
jdbc_driver1=com.mysql.cj.jdbc.Driver
jdbc_url1=jdbc:mysql://localhost:3306/sharding_1?useUnicode=true&characterEncoding=utf8&useSSL=false&serverTimezone=GMT
jdbc_username1=root
jdbc_password1=123456
validationQuery=SELECT 1
12、创建spring配置文件
12-1、spring-database.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:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
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://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.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:config/resource/jdbc_dev.properties</value>
</list>
</property>
</bean>
<bean name="sharding_0" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<property name="url" value="${jdbc_url0}" />
<property name="username" value="${jdbc_username0}" />
<property name="password" value="${jdbc_password0}" />
<!-- <property name="driverClass" value="${jdbc_driver0}" /> -->
<!-- 初始化连接大小 -->
<property name="initialSize" value="0" />
<!-- 连接池最大使用连接数量 -->
<property name="maxActive" value="20" />
<!-- 连接池最小空闲 -->
<property name="minIdle" value="0" />
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="60000" />
<property name="validationQuery" value="${validationQuery}" />
<property name="testOnBorrow" value="false" />
<property name="testOnReturn" value="false" />
<property name="testWhileIdle" value="true" />
<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis" value="60000" />
<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
<property name="minEvictableIdleTimeMillis" value="25200000" />
<!-- 打开removeAbandoned功能 -->
<property name="removeAbandoned" value="true" />
<!-- 1800秒，也就是30分钟 -->
<property name="removeAbandonedTimeout" value="1800" />
<!-- 关闭abanded连接时输出错误日志 -->
<property name="logAbandoned" value="true" />
<property name="filters" value="stat" />
</bean>
<bean name="sharding_1" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<property name="url" value="${jdbc_url1}" />
<property name="username" value="${jdbc_username1}" />
<property name="password" value="${jdbc_password1}" />
<!-- <property name="driverClass" value="${jdbc_driver1}" /> -->
<!-- 初始化连接大小 -->
<property name="initialSize" value="0" />
<!-- 连接池最大使用连接数量 -->
<property name="maxActive" value="20" />
<!-- 连接池最小空闲 -->
<property name="minIdle" value="0" />
<!-- 获取连接最大等待时间 -->
<property name="maxWait" value="60000" />
<property name="validationQuery" value="${validationQuery}" />
<property name="testOnBorrow" value="false" />
<property name="testOnReturn" value="false" />
<property name="testWhileIdle" value="true" />
<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis" value="60000" />
<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
<property name="minEvictableIdleTimeMillis" value="25200000" />
<!-- 打开removeAbandoned功能 -->
<property name="removeAbandoned" value="true" />
<!-- 1800秒，也就是30分钟 -->
<property name="removeAbandonedTimeout" value="1800" />
<!-- 关闭abanded连接时输出错误日志 -->
<property name="logAbandoned" value="true" />
<property name="filters" value="stat" />
</bean>
</beans>
12-2、spring-sharding.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:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
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://mybatis.org/schema/mybatis-spring http://mybatis.org/schema/mybatis-spring-1.2.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
<context:component-scan base-package="com.th.sharding" />
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.th.sharding.mapper"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
<!-- 配置sqlSessionFactory -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="shardingDataSource"/>
<property name="mapperLocations" value="classpath*:config/mapper/*Mapper.xml"/>
</bean>
<!-- 配置好dataSourceRulue,即对数据源进行管理 -->
<bean id="dataSourceRule" class="com.dangdang.ddframe.rdb.sharding.api.rule.DataSourceRule">
<constructor-arg>
<map>
<entry key="sharding_0" value-ref="sharding_0"/>
<entry key="sharding_1" value-ref="sharding_1"/>
</map>
</constructor-arg>
</bean>
<!-- 对t_user表的配置，进行分库配置，逻辑表名为t_user，每个库有实际的三张表 -->
<bean id="userTableRule" class="com.dangdang.ddframe.rdb.sharding.api.rule.TableRule">
<constructor-arg value="t_user" index="0"/>
<constructor-arg index="1">
<list>
<value>t_user_00</value>
<value>t_user_01</value>
<value>t_user_02</value>
</list>
</constructor-arg>
<constructor-arg index="2" ref="dataSourceRule"/>
<constructor-arg index="3" ref="userDatabaseShardingStrategy"/>
<constructor-arg index="4" ref="userTableShardingStrategy"/>
</bean>
<!-- t_user分库策略 -->
<bean id="userDatabaseShardingStrategy" class="com.dangdang.ddframe.rdb.sharding.api.strategy.database.DatabaseShardingStrategy">
<constructor-arg index="0" value="user_id"/>
<constructor-arg index="1">
<bean class="com.th.sharding.algorithm.UserSingleKeyDatabaseShardingAlgorithm" />
</constructor-arg>
</bean>
<!-- t_user 分表策略 -->
<bean id="userTableShardingStrategy" class="com.dangdang.ddframe.rdb.sharding.api.strategy.table.TableShardingStrategy">
<constructor-arg index="0" value="user_id"/>
<constructor-arg index="1">
<bean class="com.th.sharding.algorithm.UserSingleKeyTableShardingAlgorithm" />
</constructor-arg>
</bean>
<!-- 对t_student表的配置，进行分库配置，逻辑表名为t_student，每个库有实际的三张表 -->
<bean id="studentTableRule" class="com.dangdang.ddframe.rdb.sharding.api.rule.TableRule">
<constructor-arg value="t_student" index="0"/>
<constructor-arg index="1">
<list>
<value>t_student_00</value>
<value>t_student_01</value>
</list>
</constructor-arg>
<constructor-arg index="2" ref="dataSourceRule"/>
<constructor-arg index="3" ref="studentDatabaseShardingStrategy"/>
<constructor-arg index="4" ref="studentTableShardingStrategy"/>
</bean>
<!-- t_student分库策略 -->
<bean id="studentDatabaseShardingStrategy" class="com.dangdang.ddframe.rdb.sharding.api.strategy.database.DatabaseShardingStrategy">
<constructor-arg index="0" value="student_id"/>
<constructor-arg index="1">
<bean class="com.th.sharding.algorithm.StudentSingleKeyDatabaseShardingAlgorithm" />
</constructor-arg>
</bean>
<!-- t_student 分表策略 -->
<bean id="studentTableShardingStrategy" class="com.dangdang.ddframe.rdb.sharding.api.strategy.table.TableShardingStrategy">
<constructor-arg index="0" value="student_id"/>
<constructor-arg index="1">
<bean class="com.th.sharding.algorithm.StudentSingleKeyTableShardingAlgorithm" />
</constructor-arg>
</bean>
<!-- 构成分库分表的规则 传入数据源集合和每个表的分库分表的具体规则 -->
<bean id="shardingRule" class="com.dangdang.ddframe.rdb.sharding.api.rule.ShardingRule">
<constructor-arg index="0" ref="dataSourceRule"/>
<constructor-arg index="1">
<list>
<ref bean="userTableRule"/>
<ref bean="studentTableRule"/>
</list>
</constructor-arg>
</bean>
<!-- 对datasource进行封装 -->
<bean id="shardingDataSource" class="com.dangdang.ddframe.rdb.sharding.api.ShardingDataSource">
<constructor-arg ref="shardingRule"/>
</bean>
<!-- 事务 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="shardingDataSource" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
</beans>
13、创建log4j.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration PUBLIC "-//APACHE//DTD LOG4J 1.2//EN" "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<!-- [控制台STDOUT] -->
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<param name="encoding" value="GBK" />
<param name="target" value="System.out" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%-5p %c{2} - %m%n" />
</layout>
</appender>
<!-- [公共Appender] -->
<appender name="DEFAULT-APPENDER" class="org.apache.log4j.DailyRollingFileAppender">
<param name="File" value="logs/common-default.log" />
<param name="Append" value="true" />
<param name="encoding" value="GBK" />
<param name="DatePattern" value="'.'yyyy-MM-dd'.log'" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" />
</layout>
</appender>
<!-- [错误日志APPENDER] -->
<appender name="ERROR-APPENDER" class="org.apache.log4j.DailyRollingFileAppender">
<param name="File" value="logs/common-error.log" />
<param name="Append" value="true" />
<param name="encoding" value="GBK" />
<param name="threshold" value="error" />
<param name="DatePattern" value="'.'yyyy-MM-dd'.log'" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" />
</layout>
</appender>
<!-- [组件日志APPENDER] -->
<appender name="COMPONENT-APPENDER" class="org.apache.log4j.DailyRollingFileAppender">
<param name="File" value="logs/logistics-component.log" />
<param name="Append" value="true" />
<param name="encoding" value="GBK" />
<param name="DatePattern" value="'.'yyyy-MM-dd'.log'" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%d %-5p %c{2} - %m%n" />
</layout>
</appender>
<!-- [组件日志] -->
<logger name="LOGISTICS-COMPONENT">
<level value="${loggingLevel}" />
<appender-ref ref="COMPONENT-APPENDER" />
<appender-ref ref="ERROR-APPENDER" />
</logger>
<!-- Root Logger -->
<root>
<level value="${rootLevel}"></level>
<appender-ref ref="DEFAULT-APPENDER" />
<appender-ref ref="ERROR-APPENDER" />
<appender-ref ref="console" />
<appender-ref ref="COMPONENT-APPENDER" />
</root>
</log4j:configuration>
14、创建测试类ShardingJdbcMybatisTest
package com.th.test;
import java.util.Arrays;
import java.util.List;
import javax.annotation.Resource;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import com.th.sharding.entity.Student;
import com.th.sharding.entity.User;
import com.th.sharding.service.StudentService;
import com.th.sharding.service.UserService;
/**
* 测试分库分表规则
*
* @author
*
*/
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = { "classpath*:config/spring/spring-database.xml", "classpath*:config/spring/spring-sharding.xml" })
public class ShardingJdbcMybatisTest {
@Resource
public UserService userService;
@Resource
public StudentService studentService;
@Test
public void testUserInsert() {
User u = new User();
u.setUserId(11);
u.setAge(25);
u.setName("github");
Assert.assertEquals(userService.insert(u), true);
}
@Test
public void testStudentInsert() {
Student student = new Student();
student.setStudentId(21);
student.setAge(21);
student.setName("hehe");
Assert.assertEquals(studentService.insert(student), true);
}
@Test
public void testFindAll() {
List<User> users = userService.findAll();
if (null != users && !users.isEmpty()) {
for (User u : users) {
System.out.println(u);
}
}
}
@Test
public void testSQLIN() {
List<User> users = userService.findByUserIds(Arrays.asList(1,13));
if (null != users && !users.isEmpty()) {
for (User u : users) {
System.out.println(u);
}
}
}
@Test
public void testTransactionTestSucess() {
userService.transactionTestSucess();
}
@Test(expected = IllegalAccessException.class)
public void testTransactionTestFailure() throws IllegalAccessException {
userService.transactionTestFailure();
}
}
三、测试
我们进行ShardingJdbcMybatisTest类，查看数据表数据，即可看到我们的程序利用sharding-jdbc实现了分库分表操作。
四、温馨提示
大家可以到链接http://download.youkuaiyun.com/download/l1028386804/10258290下载完整的sharding-jdbc分库分表实例源代码
扫一扫
229
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
