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批量读取properties

2015-06-10 09:41 447 查看
package org.util;

import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.springframework.core.io.Resource;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

public class PropReader {


private static final String CONFIG_FILE = "classpath*:scan*.properties"; // 资源文件

private static final Map<String, String> configCache = new HashMap<String, String>(); //缓存属性文件键值对

static {
Resource[] resource = PropReader.getResources(CONFIG_FILE);
InputStream inputstream = null;
Properties properties = new Properties();
for (Resource res : resource) {
try {
inputstream = res.getInputStream();
properties.load(inputstream);
Enumeration<?> pros = properties.propertyNames();
while (pros != null && pros.hasMoreElements()) {
String name = (String) pros.nextElement();
if (StringUtils.isNotEmpty(name)) {
configCache.put(name, properties.getProperty(name, ""));
}
}
} catch (IOException e) {
throw new RuntimeException("解析配置文件[" + CONFIG_FILE + "]异常:", e);
} finally {
if(inputstream != null){
IOUtils.closeQuietly(inputstream);
}
properties.clear();
}
}
}

/**
* 获取资源文件
*
* @param locationPattern
* 资源文件表达式
* @return
*/
public static Resource[] getResources(String locationPattern) {
PathMatchingResourcePatternResolver patternResolver = new PathMatchingResourcePatternResolver();
Resource[] resources = new Resource[0];
try {
resources = patternResolver.getResources(locationPattern);
} catch (IOException e) {
throw new RuntimeException(e);
}
return resources;
}


/**
* 根据资源文件key获取对应的值
* @param key
* @return
*/
public static String getValueByKey(String key) {
return configCache.get(key);
}


/*static Properties prop ;
static{
prop = new Properties();
InputStream in = PropReader.class.getClassLoader().getResourceAsStream("/scan.properties");
try {
prop.load(in);
} catch (IOException e) {
e.printStackTrace();
}
}

public static String getValueByKey(String key){
return prop.getProperty(key);
}*/
}
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