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Java中读写资源文件最重要的类是Properties,功能大致如下：
1. 读写Properties文件
2. 读写XML文件
3. 不仅可以读写上述两类文件，还可以读写其它格式文件如txt等，只要符合key=value格式即可.
注意：资源文件中含有中文时的处理方法
1. 将中文字符通过工作转成utf8编码，可以通过Java自带的nativetoascii或Eclipse中的属性编辑器。
2. 直接调用 new String(youChineseString.getBytes("ISO-8859-1"),"GBK");
附：WEB程序中加载资源文件的方法
Properties prop = null;
1. prop = Thread.currentThread().getContextClassLoader().getResourceAsStream("filename");
2. prop =this.getClass().getClassLoader().getResourceAsStream("filename");
Properties能读取以key,value存储的任何格式文件，究竟有什么神奇，猫一眼类结构，
原来它继承了Hashtable并实现了Map接口,这样大家放心了吧。
- packageapistudy;
- importjava.io.File;
- importjava.io.FileInputStream;
- importjava.io.FileOutputStream;
- importjava.io.IOException;
- importjava.io.InputStream;
- importjava.io.OutputStream;
- importjava.io.UnsupportedEncodingException;
- importjava.util.Properties;
- publicclassPropertiesTest
- {
- staticvoidmain(String[]args)
- {
- Stringreadfile="d:"+File.separator+"readfile.properties";
- Stringwritefile="writefile.properties";
- Stringreadxmlfile="readxmlfile.xml";
- Stringwritexmlfile="writexmlfile.xml";
- Stringreadtxtfile="readtxtfile.txt";
- Stringwritetxtfile="writetxtfile.txt";
- readPropertiesFile(readfile);
- writePropertiesFile(writefile);
- readPropertiesFileFromXML(readxmlfile);
- writePropertiesFileToXML(writexmlfile);
- readPropertiesFile(readtxtfile);
- writePropertiesFile(writetxtfile);
- }
- voidreadPropertiesFile(Stringfilename)
- Propertiesproperties=newProperties();
- try
- InputStreaminputStream=newFileInputStream(filename);
- properties.load(inputStream);
- inputStream.close();
- }
- catch(IOExceptione)
- e.printStackTrace();
- Stringusername=properties.getProperty("username");
- Stringpasssword=properties.getProperty("password");
- Stringchinese=properties.getProperty("chinese");
- try
- chinese=newString(chinese.getBytes("ISO-8859-1"),"GBK");
- catch(UnsupportedEncodingExceptione)
- e.printStackTrace();
- System.out.println(username);
- System.out.println(passsword);
- System.out.println(chinese);
- //读取XML文件,255); font-weight:bold; background-color:inherit">voidreadPropertiesFileFromXML(Stringfilename)
- properties.loadFromXML(inputStream);
- inputStream.close();
- "chinese");
- //写资源文件，含中文
- voidwritePropertiesFile(Stringfilename)
- OutputStreamoutputStream=newFileOutputStream(filename);
- properties.setProperty("username",0); background-color:inherit">"myname");
- "password",0); background-color:inherit">"mypassword");
- "chinese",0); background-color:inherit">"中文");
- properties.store(outputStream,"author:shixing_11@sina.com");
- outputStream.close();
- catch(IOExceptione)
- //写资源文件到XML文件，含中文
- voidwritePropertiesFileToXML(Stringfilename)
- newProperties();
- newFileOutputStream(filename);
- "myname");
- "mypassword");
- "中文");
- properties.storeToXML(outputStream,0); background-color:inherit">"author:shixing_11@sina.com");
- outputStream.close();
- }
运行本程序所需的资源文件，我是放在D盘根目录，如D:/readfile.properties
1. readfile.properties
username=myname
password=mypassword
chinese=中文
2.writefile.properties
#author: shixing_11@sina.com
#Fri May 28 22:19:44 CST 2010
chinese=/u4E2D/u6587
username=myname
3.readxmlfile.xml
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
<properties>
<entry key="password">mypassword</entry>
<entry key="chinese">中文</entry>
<entry key="username">myname</entry>
</properties>
4.writexmlfile.xml
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<comment>author: shixing_11@sina.com</comment>
</properties>
5. readtxtfile.txt
username=myname
password=mypassword
chinese=中文
6.writetxtfile.txt
#author: shixing_11@sina.com
#Fri May 28 22:25:16 CST 2010
（编辑：李大同）
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