Java 将 XML 转换为属性 – 从 XML 文件中读取属性

短命女 2023-09-25 12:17 137阅读 0赞

**从 XML 文件创建 `.properties` 文件的 Java 示例**。此代码可用于**从 XML 文件中读取要在应用程序代码中使用的属性键值**。

### **XML 的属性示例** ###

要将 XML 文件转换为属性文件，最好的方法是使用类。流程如下：`java.util.Properties`

1.  使用方法将 XML 文件加载到类对象中。`java.util.Properties``Properties.loadFromXML()`
2.  使用 方法将内容编写为属性。`Properties.store()`

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     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>package</code> <code>com.howtodoinjava.demo;</code></span></span></span> 
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      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;">&nbsp;</span></span></span> 
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     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>import</code> <code>java.io.FileInputStream;</code></span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>import</code> <code>java.io.FileOutputStream;</code></span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>import</code> <code>java.io.IOException;</code></span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>import</code> <code>java.io.InputStream;</code></span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>import</code> <code>java.io.OutputStream;</code></span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>import</code> <code>java.util.InvalidPropertiesFormatException;</code></span></span></span> 
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     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>import</code> <code>java.util.Properties;</code></span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;">&nbsp;</span></span></span> 
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     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>public</code> <code>class</code> <code>XMLToProperties </code></span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>{ </code></span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;</code><code>public</code> <code>static</code> <code>void</code> <code>main(String[] args) </code><code>throws</code> <code>InvalidPropertiesFormatException, IOException </code></span></span></span> 
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     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;</code><code>{ </code></span></span></span> 
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      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code><code>String outPropertiesFile = </code><code>"application.properties"</code><code>;</code></span></span></span> 
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     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code><code>String inXmlFile = </code><code>"applicationProperties.xml"</code><code>;</code></span></span></span> 
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     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;">&nbsp;</span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code><code>InputStream inStream = </code><code>new</code> <code>FileInputStream(inXmlFile);&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </code><code>//Input XML File</code></span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code><code>OutputStream outStream = </code><code>new</code> <code>FileOutputStream(outPropertiesFile); </code><code>//Output properties File</code></span></span></span> 
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     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code>&nbsp;</span></span></span> 
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      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code><code>Properties props = </code><code>new</code> <code>Properties();</code></span></span></span> 
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     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code>&nbsp;</span></span></span> 
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      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code><code>//Load XML file</code></span></span></span> 
     </div> 
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      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code><code>props.loadFromXML(inStream);</code></span></span></span> 
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     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code>&nbsp;</span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code><code>//Store to properties file</code></span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code><code>props.store(outStream, </code><code>"Converted from applicationProperties.xml"</code><code>);</code></span></span></span> 
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     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code>&nbsp;</span></span></span> 
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     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code><code>//Use properties in code</code></span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;&nbsp;&nbsp;</code><code>System.out.println(props.get(</code><code>"input.dir"</code><code>));&nbsp;&nbsp;&nbsp;&nbsp; </code><code>//Prints 'c:/temp/input'</code></span></span></span> 
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     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>&nbsp;&nbsp;</code><code>}</code></span></span></span> 
     </div> 
     <div style="margin-left:0;text-align:left;"> 
      <span style="color:#000000;"><span style="background-color:#fbfbfb;"><span style="background-color:#fbfbfb;"><code>}</code></span></span></span> 
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**输入 XML 文件**

**输出属性文件**

在评论部分将您的问题放给我。

快乐学习！！

#### **相关文章：** ####

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[XML]: https://howtodoinjava.com/java/xml/convert-properties-to-xml/
[XML _ _ _ XML]: https://howtodoinjava.com/java/xml/xml-to-string-write-xml-file/
[Java]: https://howtodoinjava.com/java/io/read-write-properties-file/
[XML _ _ XML DOM]: https://howtodoinjava.com/java/xml/parse-string-to-xml-dom/
[Java _ XML _ Java DOM]: https://howtodoinjava.com/java/xml/read-xml-dom-parser-example/
[StAX _ XML _ _ API]: https://howtodoinjava.com/java/xml/read-xml-stax-parser-cursor-iterator/