属性类loadFromXML()方法 (Properties Class loadFromXML() method)

• loadFromXML() method is available in java.util package.

  loadFromXML()方法在java.util包中可用。

• loadFromXML() method is used to load all the properties denoted by the XML file on the given input stream (is) into this Properties table.

  loadFromXML()方法用于将给定输入流上XML文件表示的所有属性加载到此Properties表中。

• loadFromXML() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  loadFromXML()方法是一个非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• loadFromXML() method may throw an exception at the time of loading file.

  loadFromXML()方法在加载文件时可能会引发异常。

  • IOException: This exception may throw while reading from the input stream.IOException ：从输入流读取时，可能会抛出此异常。
  • InvalidPropertiesFormatException: This exception may throw when the Properties format is null exists.InvalidPropertiesFormatException ：如果属性格式为null，则可能引发此异常。
  • NullPointerException: This exception may throw when the given parameter is null exists.NullPointerException ：当给定参数为null时，可能引发此异常。

Syntax:

句法：

    public void loadFromXML(InputStream is);

Parameter(s):

参数：

• InputStream is – represents the input stream to read XML file with the help of the given.

  InputStream是 –表示在给定帮助下读取XML文件的输入流。

Return value:

返回值：

The return type of the method is void, it returns nothing.

该方法的返回类型为void ，不返回任何内容。

Example:

例：

// Java program to demonstrate the example
// of void loadFromXML(InputStream is) method
// of Properties
import java.io.*;
import java.util.*;
public class StoreToXMLOfProperties {public static void main(String arg[]) throws Exception {// Instantiate Properties object
Properties prop = new Properties();
prop.put("10", "C");
prop.put("20", "C++");
prop.put("30", "JAVA");
prop.put("40", "PHP");
prop.put("50", "SFDC");
// Instantiates stream for input
// and output
FileOutputStream fos = new FileOutputStream("properties.xml");
FileInputStream is = new FileInputStream("properties.xml");
// By using storeToXML() method isto
// store the properties in the given
// XML file
prop.storeToXML(fos, null);
// By using loadFromXML() method isto
// load the properties from the given
// is stream
prop.loadFromXML(is);
// Display properties on console
prop.list(System.out);
}
}

Output

输出量

-- listing properties --
50=SFDC
40=PHP
30=JAVA
20=C++
10=C

翻译自: https://www.includehelp.com/java/properties-loadfromxml-method-with-example.aspx