用java读取properties文件--转

今天为了通过java读取properties文件,google了很长时间,终于找到了。现在特记录之和大家一起分享。 
    下面直接贴出代码:java类

public class Mytest
public static void readFile(String fileName) {//传入参数fileName是要读取的资源文件的文件名如(file.properties)
InputStream in = null;
Properties pros = new Properties();
try {
if (null != fileName) {
//前提是资源文件必须和Mytest类在同一个包下
in = Mytest.class.getResourceAsStream(fileName);
//得到当前类的路径,并把资源文件名作为输入流
pros.load(in);
Enumeration en = pros.propertyNames();//得到资源文件中的所有key值
while (en.hasMoreElements()) {
String key = (String) en.nextElement();
System.out.println("key=" + key + " value=" + pros.getProperty(key));
//输出资源文件中的key与value值
}
}
} catch (IOException e) {
e.printStackTrace();
System.out.println("读取资源文件出错");
} finally {
try {
if (null != in) {
in.close();
}
} catch (IOException e) {
e.printStackTrace();
System.out.println("关闭流失败");
}
} }

方法二:

import java.util.MissingResourceException;
import java.util.ResourceBundle; public class Messages {
private static final String BUNDLE_NAME = "com.xxx.cs.mm.service.messages"; //messages.properties文件和Messages类在同一个包下,包名:com.xxx.cs.mm.service private static final ResourceBundle RESOURCE_BUNDLE = ResourceBundle.getBundle(BUNDLE_NAME); private Messages() {
} public static String getString(String key) {
try {
return RESOURCE_BUNDLE.getString(key);
} catch (MissingResourceException e) {
return '!' + key + '!';
}
}
}

转自:http://duqiangcise.iteye.com/blog/319793

使用J2SE API读取Properties文件的六种方法

1。使用java.util.Properties类的load()方法
示例: InputStream in = lnew BufferedInputStream(new FileInputStream(name));
Properties p = new Properties();
p.load(in);

2。使用java.util.ResourceBundle类的getBundle()方法
示例: ResourceBundle rb = ResourceBundle.getBundle(name, Locale.getDefault());

3。使用java.util.PropertyResourceBundle类的构造函数
示例: InputStream in = new BufferedInputStream(new FileInputStream(name));
ResourceBundle rb = new PropertyResourceBundle(in);

4。使用class变量的getResourceAsStream()方法
示例: InputStream in = JProperties.class.getResourceAsStream(name);
Properties p = new Properties();
p.load(in);

5。使用class.getClassLoader()所得到的java.lang.ClassLoader的getResourceAsStream()方法
示例: InputStream in = JProperties.class.getClassLoader().getResourceAsStream(name);
Properties p = new Properties();
p.load(in);

6。使用java.lang.ClassLoader类的getSystemResourceAsStream()静态方法
示例: InputStream in = ClassLoader.getSystemResourceAsStream(name);
Properties p = new Properties();
p.load(in);

补充

Servlet中可以使用javax.servlet.ServletContext的getResourceAsStream()方法
示例:InputStream in = context.getResourceAsStream(path);
Properties p = new Properties();
p.load(in);

注意:

this.getclass.getResourceAsStream(name);  //类与资源文件同级--同一个目录下

this.class.getClassLoader().getResourceAsStream(name); //资源文件与classpath同级。

未知来源

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