Question

jar包里面的代码如何读取jar包中的配置文件？

Answer 1

先看代码目录结构：
src/weather/
QueryWeather.java
weather.xml
程序里面可以直接读取到weather.xml文件，代码如下：
private static String getXmlContent()throws IOException {
FileReader f = new FileReader("src/weather/weather.xml");
BufferedReader fb = new BufferedReader(f);
StringBuffer sb = new StringBuffer("");
String s = "";
while((s = fb.readLine()) != null) {
sb = sb.append(s);}return sb.toString();}但是一旦把这个class文件和xml文件打成jar包再运行，对不起，报错，QueryWeather.class字节码根本找不到weather.xml
在看打成jar包的结构：META-INFMANIFEST.MFweatherQueryWeather.class
weather.xml
用下面的方法就可以找到weather.xml
private static String getXmlContent()throws IOException {
Reader f = new InputStreamReader(QueryWeather.class.getClass().getResourceAsStream("/weather/weather.xml"));
BufferedReader fb = new BufferedReader(f);
StringBuffer sb = new StringBuffer("");
String s = "";