Property工具类，Properties文件工具类，PropertiesUtils工具类
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蕃薯耀 2016年8月9日 11:31:12 星期二
http://fanshuyao.iteye.com/
package com.chinagas.common.utils; import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import java.util.Set; import org.slf4j.Logger;
import org.slf4j.LoggerFactory; public class PropertiesUtils { private static Logger log = LoggerFactory.getLogger(PropertiesUtils.class); /**
* 根据文件名获取Properties对象
* @param fileName
* @return
*/
public static Properties read(String fileName){
InputStream in = null;
try{
Properties prop = new Properties();
//InputStream in = Object.class.getResourceAsStream("/"+fileName);
in = PropertiesUtils.class.getClassLoader().getResourceAsStream(fileName);
prop.load(in);
return prop;
}catch(Exception e){
e.printStackTrace();
}finally{
try {
if(in != null){
in.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
} /**
* 根据文件名和键名获取值
* @param fileName
* @param key
* @return
*/
public static String readKeyValue(String fileName, String key){
Properties prop = read(fileName);
if(prop != null){
return prop.getProperty(key);
}
return null;
} /**
* 根据键名获取值
* @param prop
* @param key
* @return
*/
public static String readKeyValue(Properties prop, String key){
if(prop != null){
return prop.getProperty(key);
}
return null;
} /**
* 写入
* @param fileName
* @param key
* @param value
*/
public static void writeValueByKey(String fileName, String key, String value){
Map<String, String> properties = new HashMap<String, String>();
properties.put(key, value);
writeValues(fileName, properties);
} /**
* 写入
* @param fileName
* @param properties
*/
public static void writeValues(String fileName, Map<String, String> properties){
InputStream in = null;
OutputStream out = null;
try {
in = PropertiesUtils.class.getClassLoader().getResourceAsStream(fileName);
Properties prop = new Properties();
prop.load(in);
String path = PropertiesUtils.class.getResource("/"+fileName).getPath();
out = new FileOutputStream(path);
if(properties != null){
Set<String> set = properties.keySet();
for (String string : set) {
prop.setProperty(string, properties.get(string));
log.info("更新"+fileName+"的键（"+string+"）值为："+properties.get(string));
}
}
prop.store(out, "update properties");
} catch (Exception e) {
e.printStackTrace();
} finally{
try {
if(in != null){
in.close();
}
if(out != null){
out.flush();
out.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
} public static void main(String[] args) throws Exception {
//System.out.println("read="+read("config.properties")); //System.out.println("readKeyValue="+readKeyValue("config.properties","superAdmin")); //writeValueByKey(CC.WEIXI_PROPERTIES, "access_token", "ddd"); Map<String, String> properties = new HashMap<String, String>();
properties.put("access_token", "ddd2");
properties.put("access_token1", "ee2");
properties.put("bbbb", "bbbb");
}
}
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蕃薯耀 2016年8月9日 11:31:12 星期二
http://fanshuyao.iteye.com/
