redis是著名的缓存数据库，功能非常强大，使用也比较简单，我设计的RedisFile项目是用来模拟上传文件数据到缓存中。项目放在oschina中，下载地址是：https://git.oschina.net/pandason125/RedisFile.git 可以去下载，接下来的几篇博客将讲解里面的代码：所需的jar包有：commons-pool2-2.2.jar，dom4j-1.6.1.jar，jedis-2.4.1.jar。我就按包顺序来讲解代码吧，先从com.ylzinfo.redis.config包讲起，里面有Configure.java和SysConstants.java两个类，是读取配置文件，和redis参数的，分别读取cache-online.properties和system.properties参数：

package com.ylzinfo.redis.config;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Properties;
import java.util.concurrent.ConcurrentHashMap;

import org.dom4j.DocumentException;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;

/**
 * @author asartear
 * 
 */
public class Configure {

	public Properties systemConfig;

	public Properties cacheConfig;

	public Configure() {
		systemConfig = new Properties();
		cacheConfig = new Properties();
		try {
			loadConfigs();
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	public Properties getSystemConfig() {
		return systemConfig;
	}

	public Properties getCacheConfig() {
		return cacheConfig;
	}

	/**
	 * 加载缓存配置
	 * 
	 * @throws Exception
	 */
	public void loadConfigs() throws Exception {
		loadSystemConfig();
		loadCacheConfig();

	}
	/*
	 * 获取system.properties
	 */
	public void loadSystemConfig()
	{
		propertyConfigLoader_sys("/system.properties", systemConfig);
	}
	public void propertyConfigLoader_sys(String configFilePath, Properties config)
	{
		InputStream configFileStream = this.getClass().getResourceAsStream(configFilePath);
		try {
			
			config.load(configFileStream);
		} catch (IOException e) {
			
		}
	}
	/*
	 * 获取cache-online.properties
	 */
	public void loadCacheConfig() {
		String path =  systemConfig.getProperty("com.ylzinfo.config.file.cache");
		propertyConfigLoader(path, cacheConfig);
	}

	public void propertyConfigLoader(String configFilePath, Properties config) {
		if (configFilePath.length() == 0) {
			return;
		}
		InputStream configFileStream = this.getClass().getResourceAsStream(configFilePath);

		//File file = new File(configFilePath);
		//if (file.exists()) {
			try {
			//	InputStream configFileStream = new FileInputStream(file);
				config.load(configFileStream);
			} catch (IOException e) {
		//	}
		}

	}

}

package com.ylzinfo.redis.config;


public class SysConstants {

	// --------------- redis pool ---------------
	
	// 从数据库连接池中取得连接时，对其的有效性进行检查
	public static final boolean TEST_ON_BORROW = true;
	
	// 最大连接数
	public static final int MAX_ACTIVE = 36;
	
	// 最大闲置的连接数
	public static final int MAX_IDLE = 20;
	
	// 最小.....
	public static final int MIN_IDLE = 5;
	
	// 请求最长等待时间/毫秒
	public static final int MAX_WAIT = 1000; 
	
	// 闲置时测试
	public static final boolean TEST_WHILE_IDLE = true;
	
	
}

cache-online.properties内容：

instances=upload,unread,group_counter,business
#\u4E0A\u4F20\u6587\u4EF6\u7684redis

upload_host=192.168.44.56

upload_port=6379
upload_db=0
#\u672A\u8BFB\u6D88\u606F\u8BA1\u6570\u5668\u7684redis

unread_host=192.168.44.56
unread_port=6379
#unread_port=11365
unread_db=1

#\u7FA4\u6D88\u606F\u8BA1\u6570\uFF0C\u672A\u8BFB\u6D88\u606F\u548C\u603B\u8BA1\u6570\u90FD\u5728\u8FD9\u91CC

group_counter_host=192.168.44.56
#group_counter_port=11365
group_counter_port=6379
group_counter_db=2

#IM \u4E1A\u52A1 cache

business_host=192.168.44.56
#business_port=11365
business_port=6379
business_db=3

#com.ylzinfo.config.file.db=${config.file.db}
com.ylzinfo.config.file.cache=/cache-online.properties

关于我的开源项目RedisFile讲解 一