Spring-Boot+Mybaits+MySql多数据源+通用分页插件PageHelper的使用

一、项目目录结构图

二、pom依赖

	4.0.0
	com.appleyk
	Spring-Boot-MyBatis-PageHelper
	0.0.1-SNAPSHOT
	war
	Spring-Boot 集成Mybatis+多数据源配置+Mybatis通用分页插件的使用
	
		org.springframework.boot
		spring-boot-starter-parent
		1.5.12.RELEASE
	
	
	
		1.8
		1.1.1
		1.1.1
		2.9.1
	
	
		
			org.springframework.boot
			spring-boot-starter-web
			
				
					com.fasterxml.jackson.core
					jackson-core
				
			
		
		
		
		
		
			org.springframework.boot
			spring-boot-devtools
			
			
			true
		
		
		
			org.springframework.boot
			spring-boot-starter-test
			test
		
		
		
			junit
			junit
		
		
		
			org.mybatis.spring.boot
			mybatis-spring-boot-starter
			${mybatis.version}
		
		
		
			com.github.pagehelper
			pagehelper-spring-boot-starter
			${pagehelper.version}
				
		
		
			mysql
			mysql-connector-java
		
		
		
		
			tk.mybatis
			mapper-spring-boot-starter
			1.1.5
		
		
		
			com.fasterxml.jackson.core
			jackson-core
			${jackson.version}
		
		
			com.fasterxml.jackson.core
			jackson-annotations
			${jackson.version}
		
		
			com.fasterxml.jackson.core
			jackson-databind
			${jackson.version}
		
	

三、属性properties文件

server.port=8085
server.session.timeout=10
server.tomcat.uri-encoding=utf8

#在application.properties文件中引入日志配置文件
#=====================================  log  =============================
logging.config=classpath:logback-boot.xml


#主数据源 == master
spring.datasource.master.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.master.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.master.url=jdbc\:mysql\://localhost\:3306/movie?useUnicode\=true&autoReconnect=true&useSSL=false&characterEncoding\=utf-8&useSSL=true
spring.datasource.master.username=root
spring.datasource.master.password=root

# 下面为连接池的补充设置，应用到上面所有数据源中  
# 初始化大小，最小，最大  
spring.datasource.master.initialSize=5  
spring.datasource.master.minIdle=5  
spring.datasource.master.maxActive=20  
# 配置获取连接等待超时的时间  
spring.datasource.master.maxWait=60000  
# 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙  
spring.datasource.master.filters=stat,wall,log4j  


#从数据源 == slave
spring.datasource.slave.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.slave.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.slave.url=jdbc\:mysql\://localhost\:3306/test?useUnicode\=true&autoReconnect=true&useSSL=false&characterEncoding\=utf-8&useSSL=true
spring.datasource.slave.username=root
spring.datasource.slave.password=root

# 下面为连接池的补充设置，应用到上面所有数据源中  
# 初始化大小，最小，最大  
spring.datasource.slave.initialSize=5  
spring.datasource.slave.minIdle=5  
spring.datasource.slave.maxActive=20  
# 配置获取连接等待超时的时间  
spring.datasource.slave.maxWait=60000  
# 配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙  
spring.datasource.slave.filters=stat,wall,log4j  

四、数据

MySql数据库执行脚本语句下载地址： https://download.csdn.net/download/appleyk/10417081 【直接执行就可以导入】

五、通用PageInfo类，对Page结果进行包装

PageInfo.java

package com.appleyk.paging;
import java.io.Serializable;
import java.util.Collection;
import java.util.List;

import com.github.pagehelper.Page;

/**
 * 对Page结果进行包装
 * 

 * 新增分页的多项属性，主要参考:http://bbs.csdn.net/topics/360010907
 *
 * @author liuzh/abel533/isea533
 * @version 3.3.0
 * @since 3.2.2
 * 项目地址 : http://git.oschina.net/free/Mybatis_PageHelper
 */
@SuppressWarnings({"rawtypes", "unchecked"})
public class PageInfo implements Serializable {
    private static final long serialVersionUID = 1L;
    //当前页
    private int pageNum;
    //每页的数量
    //private int pageSize;
    //总记录数
    private long total;
    //总页数
    private int pages;
    //结果集
    private List list;
    //是否为第一页
    //private boolean isFirstPage = false;
    //是否为最后一页
    //private boolean isLastPage = false;


    public PageInfo() {
    }

    /**
     * 包装Page对象
     *
     * @param list
     */
    public PageInfo(List list) {
        if (list instanceof Page) {
            Page page = (Page) list;
            this.pageNum = page.getPageNum();
            //this.pageSize = page.getPageSize();

            this.pages = page.getPages();
            this.list = page;
            this.total = page.getTotal();
        } else if (list instanceof Collection) {
            this.pageNum = 1;
            //this.pageSize = list.size();

            this.pages = 1;
            this.list = list;
            this.total = list.size();
        }
        if (list instanceof Collection) {
            //判断页面边界
            judgePageBoudary();
        }
    }
    
    public PageInfo(PageInfo pageInfo, List list) { 
    	this.pageNum = pageInfo.getPageNum();
    	this.pages = pageInfo.getPages() == 0 ? 1 : pageInfo.getPages();
    	this.total = pageInfo.getTotal();
    	this.list = list;
    }
    
    public PageInfo(PageInfo pageInfo1, PageInfo pageInfo2, List list) { 
    	this.pageNum = pageInfo1.getPageNum();
    	int pages1 = pageInfo1.getPages() == 0 ? 1 : pageInfo1.getPages();
    	int pages2 = pageInfo2.getPages() == 0 ? 1 : pageInfo2.getPages();
    	this.pages = pages1 > pages2 ? pages1 : pages2;
    	this.total = pageInfo1.getTotal() + pageInfo2.getTotal();
    	this.list = list;
    }

    /**
     * 判定页面边界
     */
    private void judgePageBoudary() {
        //isFirstPage = pageNum == 1;
        //isLastPage = pageNum == pages;
    }

    public int getPageNum() {
        return pageNum;
    }

    public void setPageNum(int pageNum) {
        this.pageNum = pageNum;
    }

    public long getTotal() {
        return total;
    }

    public void setTotal(long total) {
        this.total = total;
    }

    public int getPages() {
        return pages;
    }

    public void setPages(int pages) {
        this.pages = pages;
    }

    public List getList() {
        return list;
    }

    public void setList(List list) {
        this.list = list;
    }

    @Override
    public String toString() {
        final StringBuffer sb = new StringBuffer("PageInfo{");
        sb.append("pageNum=").append(pageNum);
        //sb.append(", pageSize=").append(pageSize);
        sb.append(", total=").append(total);
        sb.append(", pages=").append(pages);
        sb.append(", list=").append(list);
        //sb.append(", isFirstPage=").append(isFirstPage);
        //sb.append(", isLastPage=").append(isLastPage);
        sb.append(", navigatepageNums=");
        sb.append('}');
        return sb.toString();
    }
}

六、实现电影信息查询【Controller】

七、Service服务查询电影信息

八、测试

（1）按每页10条记录分，显示第2页的记录集

（2）按每页2条记录分，显示第78页的记录集

九、GitHub项目地址

项目下载地址：Spring-Boot-MyBatis-PageHelper

有问题请扫问题码进行有偿提问！