Properties和IO流的读取路径

[独孤帆]

我在SRC下建立了一个文件，用IO流读取的话路径是"src/xxxx.xx",用Properties只要"xxxx.xx"就能读取，为什么呢

[若鱼1919]

IO流:使用文件相对路径
Properties：从classpath中查找

[Headsen]

classpath文件中找
如：

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="src"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="output" path="bin"/>
</classpath>
源路径默认src

[火龙果被占用了]

这是相对路径，相对于这个路径 System.getProperty("user.dir");

不建议使用这样加载 .properties 文件，改为：

InputStream is = Thread.currentThread().getContextClassLoader().getResourceAsStream("xxx.properties");
properties.load(is);

[dracularking]

补充下，是用的eclipse之类的吗？
IO的话应是以项目路径为默认根路径处理，所以加src，或者换bin试试？

Properties我不知道你怎么用的，但按照你的描述，应该是用了相对output folder的路径，即主要编译所产生class类的路径，另附：

// Load the user settings.
String userSettingsFile = System.getProperty("user.home")+"/user_settings.ini";
BufferedReader in = null;
try {
    in = Utilities.getBufferedReader(userSettingsFile);
    settings.load(in);
    in.close();
} catch (Exception e) {
    /* Program starts with default settings. */
}
finally {
    if(in != null)
    try {
        in.close();
    } catch (IOException e) {}
}

/**
 * Returns a <code>BufferedReader</code> to the file corresponding to the passed filename.
 * <p>
 * This method searches for the file in the class path.
 *  
 * @param filename  the name of the file
 * @return the <code>BufferedReader</code> to the file corresponding to the passed filename
 */
public static BufferedReader getBufferedReader(String filename) {

    BufferedReader b = null;

    // Try to read the file, no matter if it is in the class path or not.
    try {
        b = new BufferedReader(new FileReader(filename));	
    } catch (Exception e) {}

    // If the program is started as web start application the file 
    // may be in the jar file.Hence try to read it from the jar, too.
    try {
        if(b == null)
	    b = new BufferedReader(new InputStreamReader(Main.class.getResourceAsStream(filename)));			
    } catch (Exception e) {}
        return b;
}