屬性類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()方法用于將給定輸入流上XML文件表示的所有屬性加載到此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()方法是一個非靜態方法，只能通過類對象訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。

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

  loadFromXML()方法在加載文件時可能會引發異常。

  • IOException: This exception may throw while reading from the input stream.IOException ：從輸入流讀取時，可能會拋出此異常。
  • InvalidPropertiesFormatException: This exception may throw when the Properties format is null exists.InvalidPropertiesFormatException ：如果屬性格式為null，則可能引發此異常。
  • NullPointerException: This exception may throw when the given parameter is null exists.NullPointerException ：當給定參數為null時，可能引發此異常。

Syntax:

句法：

    public void loadFromXML(InputStream is);

Parameter(s):

參數：

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

  InputStream是 –表示在給定幫助下讀取XML文件的輸入流。

Return value:

返回值：

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

該方法的返回類型為void ，不返回任何內容。

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

輸出量

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

翻譯自: https://www.includehelp.com/java/properties-loadfromxml-method-with-example.aspx