blocks|key|1677506|text|从包com.al.common.email.templates中的类加载属性时，可以使用|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1677507|Properties+prop+=+new+Properties();
InputStream+in+=+getClass().getResourceAsStream("foo.properties");
prop.load(in);
in.close();|code-block|syntax|javascript|1677508|(添加所有必要的异常处理)。|1677509|如果您的类不在该包中，则需要以稍微不同的方式获取InputStream：|1677510|InputStream+in+=+
+getClass().getResourceAsStream("/com/al/common/email/templates/foo.properties");|1677511|getResource()/getResourceAsStream()中的相对路径(没有前导‘/’的路径)意味着将相对于表示类所在的包的目录来搜索资源。|1677512|使用java.lang.String.class.getResource("foo.txt")将在类路径上搜索(不存在的)文件/java/lang/String/foo.txt。|1677513|使用绝对路径(以‘/’开头的路径)意味着当前包被忽略。|1677514|entityMap^0|2|T|0|0|0|0|0|0|D|E|L|0|2|19|1R|P|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|13|8|@]|D|@]|E|$]]|$1|O|3|P|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|Q|3|R|5|6|7|15|8|@$9|16|A|17|B|C]|$9|18|A|19|B|C]]|D|@]|E|$]]|$1|S|3|T|5|6|7|1A|8|@$9|1B|A|1C|B|C]|$9|1D|A|1E|B|C]]|D|@]|E|$]]|$1|U|3|V|5|6|7|1F|8|@]|D|@]|E|$]]|$1|W|3|-4|5|6|7|1G|8|@]|D|@]|E|$]]]|X|$]]

When loading the Properties from a Class in the package <code>com.al.common.email.templates</code> you can use

<pre><code>Properties prop = new Properties();
InputStream in = getClass().getResourceAsStream("foo.properties");
prop.load(in);
in.close();
</code></pre>

(Add all the necessary exception handling).

If your class is not in that package, you need to aquire the InputStream slightly differently:

<pre><code>InputStream in = 
 getClass().getResourceAsStream("/com/al/common/email/templates/foo.properties");
</code></pre>

Relative paths (those without a leading '/') in <code>getResource()</code>/<code>getResourceAsStream()</code> mean that the resource will be searched relative to the directory which represents the package the class is in.

Using <code>java.lang.String.class.getResource("foo.txt")</code> would search for the (inexistent) file <code>/java/lang/String/foo.txt</code> on the classpath.

Using an absolute path (one that starts with '/') means that the current package is ignored.

blocks|key|1677568|text|假设您使用的是Properties类，通过它的load方法，我猜您正在使用ClassLoader+getResourceAsStream来获取输入流。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1677569|您是如何传入名称的，看起来应该是这样的：/com/al/common/email/templates/foo.properties|style|CODE|1677570|entityMap|0|LINK|mutability|MUTABLE|url|http://java.sun.com/j2se/1.5.0/docs/api/java/util/Properties.html|1|http://java.sun.com/j2se/1.5.0/docs/api/java/util/Properties.html#load(java.io.InputStream)|2|http://java.sun.com/j2se/1.5.0/docs/api/java/lang/ClassLoader.html#getResourceAsStream(java.lang.String)^0|7|A|0|N|4|1|1D|J|2|0|K|19|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]|$A|X|B|Y|1|Z]|$A|10|B|11|1|12]]|C|$]]|$1|D|3|E|5|6|7|13|8|@$A|14|B|15|F|G]]|9|@]|C|$]]|$1|H|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]|P|$5|K|L|M|C|$N|Q]]|R|$5|K|L|M|C|$N|S]]]]

Assuming your using the <a href="http://java.sun.com/j2se/1.5.0/docs/api/java/util/Properties.html" rel="nofollow noreferrer">Properties</a> class, via its <a href="http://java.sun.com/j2se/1.5.0/docs/api/java/util/Properties.html#load(java.io.InputStream)" rel="nofollow noreferrer">load</a> method, and I guess you are using the ClassLoader <a href="http://java.sun.com/j2se/1.5.0/docs/api/java/lang/ClassLoader.html#getResourceAsStream(java.lang.String)" rel="nofollow noreferrer">getResourceAsStream</a> to get the input stream. 

How are you passing in the name, it seems it should be in this form: <code>/com/al/common/email/templates/foo.properties</code>

blocks|key|1677637|text|为了补充Joachim+Sauer的回答，如果您需要在静态上下文中执行此操作，您可以执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1677638|static+{
++Properties+prop+=+new+Properties();
++InputStream+in+=+CurrentClassName.class.getResourceAsStream("foo.properties");
++prop.load(in);
++in.close()
}|code-block|syntax|javascript|1677639|(和以前一样，异常处理被省略了。)|1677640|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

To add to Joachim Sauer's answer, if you ever need to do this in a static context, you can do something like the following:

<pre><code>static {
 Properties prop = new Properties();
 InputStream in = CurrentClassName.class.getResourceAsStream("foo.properties");
 prop.load(in);
 in.close()
}
</code></pre>

(Exception handling elided, as before.)

blocks|key|1677644|text|public+class+Test{++
++static+{
++++loadProperties();
}
+++static+Properties+prop;
+++private+static+void+loadProperties()+{
++++prop+=+new+Properties();
++++InputStream+in+=+Test.class
++++++++++++.getResourceAsStream("test.properties");
++++try+{
++++++++prop.load(in);
++++++++in.close();
++++}+catch+(IOException+e)+{
++++++++e.printStackTrace();
++++}

}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1677645|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>public class Test{ 
 static {
 loadProperties();
}
 static Properties prop;
 private static void loadProperties() {
 prop = new Properties();
 InputStream in = Test.class
 .getResourceAsStream("test.properties");
 try {
 prop.load(in);
 in.close();
 } catch (IOException e) {
 e.printStackTrace();
 }

}
</code></pre>

blocks|key|1677663|text|public+class+ReadPropertyDemo+{
++++public+static+void+main(String[]+args)+{
++++++++Properties+properties+=+new+Properties();

++++++++try+{
++++++++++++properties.load(new+FileInputStream(
++++++++++++++++++++"com/technicalkeeda/demo/application.properties"));
++++++++++++System.out.println("Domain+:-+"+%2B+properties.getProperty("domain"));
++++++++++++System.out.println("Website+Age+:-+"
++++++++++++++++++++%2B+properties.getProperty("website_age"));
++++++++++++System.out.println("Founder+:-+"+%2B+properties.getProperty("founder"));

++++++++++++//+Display+all+the+values+in+the+form+of+key+value
++++++++++++for+(String+key+:+properties.stringPropertyNames())+{
++++++++++++++++String+value+=+properties.getProperty(key);
++++++++++++++++System.out.println("Key:-+"+%2B+key+%2B+"Value:-+"+%2B+value);
++++++++++++}

++++++++}+catch+(IOException+e)+{
++++++++++++System.out.println("Exception+Occurred"+%2B+e.getMessage());
++++++++}

++++}
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1677664|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>public class ReadPropertyDemo {
 public static void main(String[] args) {
 Properties properties = new Properties();

 try {
 properties.load(new FileInputStream(
 "com/technicalkeeda/demo/application.properties"));
 System.out.println("Domain :- " + properties.getProperty("domain"));
 System.out.println("Website Age :- "
 + properties.getProperty("website_age"));
 System.out.println("Founder :- " + properties.getProperty("founder"));

 // Display all the values in the form of key value
 for (String key : properties.stringPropertyNames()) {
 String value = properties.getProperty(key);
 System.out.println("Key:- " + key + "Value:- " + value);
 }

 } catch (IOException e) {
 System.out.println("Exception Occurred" + e.getMessage());
 }

 }
}
</code></pre>

blocks|key|1462575|text|我设法用这个电话解决了这个问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1462576|Properties+props+=+PropertiesUtil.loadProperties("whatever.properties");|code-block|syntax|javascript|1462577|此外，还必须将whatever.properties文件放在/src/main/resources中|1462578|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I managed to solve this issue with this call

<pre><code>Properties props = PropertiesUtil.loadProperties("whatever.properties");
</code></pre>

Extra, you have to put your whatever.properties file in /src/main/resources

blocks|key|1677785|text|没有人提到类似但比上面更简单的解决方案，不需要处理类的包。假设myfile.properties在类路径中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1677786|++++++++Properties+properties+=+new+Properties();
++++++++InputStream+in+=+ClassLoader.getSystemResourceAsStream("myfile.properties");
++++++++properties.load(in);
++++++++in.close();|code-block|syntax|javascript|1677787|尽情享受|1677788|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Nobody mentions the similar but even simpler solution than above with no need to deal with the package of the class. Assuming myfile.properties is in the classpath.

<pre><code> Properties properties = new Properties();
 InputStream in = ClassLoader.getSystemResourceAsStream("myfile.properties");
 properties.load(in);
 in.close();
</code></pre>

Enjoy

I need to read a properties files that's buried in my package structure in <code>com.al.common.email.templates</code>.

I've tried everything and I can't figure it out.

In the end, my code will be running in a servlet container, but I don't want to depend on the container for anything. I write JUnit test cases and it needs to work in both.

Loading a properties file from Java package

容器

我需要读取隐藏在com.al.common.email.templates包结构中的属性文件。我什么都试过了，但还是想不通。最后，我的代码将在servlet容器中运行，但我不想依赖于容器中的任何东西。我编写JUnit测试用例，它需要在两者中都能工作。

问从Java包加载属性文件
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