Java中读取资源文件的工具类
Java中读取资源文件的工具类
- package com.justsy;
- import java.io.InputStream;
- import java.util.Properties;
- public class PropertiesManager {
- private String resName = "appstore.properties";
- private Properties prop = new Properties();
- public PropertiesManager configuration() {
- try {
- InputStream is = PropertiesManager.class.getClassLoader()
- .getResourceAsStream(resName);
- prop.load(is);
- if (is != null)
- is.close();
- } catch (Exception e) {
- System.out.println(e + "file " + resName + " not found");
- }
- return this;
- }
- public String getPara(String url) {
- return prop.getProperty(url);
- }
- public static void main(String[] args) {
- PropertiesManager pm = new PropertiesManager().configuration() ;
- System.out.println(pm.getPara("url"));
- }
- }
使用单例进行优化后的工具类
[java]
- package com.justsy.eas.util;
- import java.io.IOException;
- import java.io.InputStream;
- import java.util.Properties;
- import org.apache.log4j.Logger;
- /**
- * 读取配置文件
- */
- public class PropertiesReader {
- private Logger logger = Logger.getLogger(Properties.class) ;
- private Properties properties ;
- private static PropertiesReader propertiesReader = new PropertiesReader() ;
- private String resName = "eas.properties" ;
- // 单例私有化构造方法
- private PropertiesReader(){
- InputStream is = PropertiesReader.class.getClassLoader()
- .getResourceAsStream(resName);
- properties = new Properties() ;
- try {
- properties.load(is);
- logger.info("加载配置信息!!") ;
- } catch (IOException e) {
- logger.warn("加载配置文件出错!") ;
- //e.printStackTrace();
- }
- }
- // 得到PropertiesReader的实例
- public static PropertiesReader getInstance(){
- if(propertiesReader==null){
- return new PropertiesReader() ;
- }
- return propertiesReader ;
- }
- // 返回所有属性
- public Properties getProperties(){
- return this.properties ;
- }
- public static void main(String[] args) {
- Properties properties = PropertiesReader.getInstance().getProperties() ;
- System.out.println(properties.getProperty("dbaddr"));
- }
- }
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