Java之Property类使用

http://blog.csdn.net/hopestar2/article/details/6372883

在项目中经常用到各种配置文件，有.properties的，也有.xml格式的

都可以通过java.utils.Property类进行处理。

    1. 读取.properties文件

    

File pFile = new File("test.properties");
        FileInputStream   pInStream=null;
        try {
            pInStream = new FileInputStream(pFile );
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        Properties p = new Properties();
        try {
            p.load(pInStream );
        } catch (IOException e) {
            e.printStackTrace();
        }
        Enumeration enu = p.propertyNames();  //取出所有的key
        p.list(System.out) ;
        while(enu.hasMoreElements())
        {
            String thisKey = (String)enu.nextElement();
            System.out.println("key="+thisKey);
            System.out.println("value="+p.getProperty(thisKey));
        }

    .properties测试文件内容如下：

    name = tinyfun
    age = 25
    sex = man
    title = software developer

    2. 读取XML文件

   

             File pFile = new File("test.xml");
FileInputStream pInStream = null;
try {
    pInStream = new FileInputStream(pFile);
    Properties p = new Properties();
    p.loadFromXML(pInStream);
    p.list(System.out);

} catch (IOException e) {
    e.printStackTrace();
}

    xml文件如下：

    

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE properties SYSTEM "http://java.sun.com/dtd/properties.dtd">
<properties>
<comment>test</comment>
<entry key="age">25</entry>
<entry key="name">tinyfun</entry>
<entry key="sex">man</entry>
<entry key="title">software developer</entry>
</properties>

3. 写入XML文件

              Properties p = new Properties();
p.setProperty("name","tinyfun");
p.setProperty("age","25");
p.setProperty("sex","man");
p.setProperty("title","software developer");
try{
    PrintStream fW = new PrintStream(new File("test.xml"));
    p.storeToXML(fW,"test");
} catch (IOException e) {
    e.printStackTrace();
}

 4. 写入.properties文件

              Properties p = new Properties();
p.setProperty("name","tinyfun");
p.setProperty("age","25");
p.setProperty("sex","man");
p.setProperty("title","software developer");
try{
    PrintStream fW = new PrintStream(new File("test.properties"));
    p.list(fW );        }
catch (IOException e) {
    e.printStackTrace();
}