The Java Property class uses

http://blog.csdn.net/hopestar2/article/details/6372883

A variety of configuration files are often used in projects, with. Properties, and also in. xml format

Can be handled through the Java.utils.Property class.

1. Read the. properties file

[C-sharp]View PlainCopy

2. File PFile = new File ("test.properties");
4. FileInputStream pinstream=null;
6. try {
8. Pinstream = new FileInputStream (PFile);
10. } catch (FileNotFoundException e) {
12. E.printstacktrace ();
14. }
16. Properties P = new properties ();
18. try {
20. P.load (Pinstream);
22. } catch (IOException e) {
24. E.printstacktrace ();
26. }
28. Enumeration ENU = P.propertynames (); //Remove all keys
30. P.list (System.   Out);
32. While (Enu.hasmoreelements ())
34. {
36. String ThisKey = (string) enu.nextelement ();
38. System.  out.println ("key=" +thiskey);
40. System.  out.println ("value=" +p.getproperty (ThisKey));
42. }

The. Properties test file reads as follows:

Name = Tinyfun
Age = 25
Sex = Mans
title = Software Developer

2. Read the XML file

[Java]View PlainCopy

2. File PFile = new File ("Test.xml");
4. FileInputStream pinstream = null;
6. try {
8. Pinstream = new FileInputStream (PFile);
10. Properties P = new properties ();
12. P.loadfromxml (Pinstream);
14. P.list (System.out);
18. } catch (IOException e) {
20. E.printstacktrace ();
22. }

The XML file is as follows:

[XHTML]View PlainCopy

2. <? XML version= "1.0" encoding="UTF-8" standalone="No"?>
4. <! DOCTYPE Properties SYSTEM "Http://java.sun.com/dtd/properties.dtd">
6. <properties>
8. <comment>test</comment>
10. <entry key="age">25</entry>
12. <entry key="name">tinyfun</entry>
14. <entry key="Sex">man</entry>
16. <entry key="title">software developer</entry>
18. </Properties>

3. Writing an XML file

[Java]View PlainCopy

2. Properties P = new properties ();
4. P.setproperty ("name","Tinyfun");
6. P.setproperty ("age","25");
8. P.setproperty ("Sex","man");
10. P.setproperty ("title","software developer");
12. try{
14. PrintStream FW = new PrintStream (new File ("Test.xml"));
16. P.storetoxml (FW,"test");
18. } catch (IOException e) {
20. E.printstacktrace ();
22. }

4. Write to the. Properties file

[Java]View PlainCopy

2. Properties P = new properties ();
4. P.setproperty ("name","Tinyfun");
6. P.setproperty ("age","25");
8. P.setproperty ("Sex","man");
10. P.setproperty ("title","software developer");
12. try{
14. PrintStream FW = new PrintStream (new File ("test.properties"));
16. P.list (FW); }
18. catch (IOException e) {
20. E.printstacktrace ();
22. }

Java Property class use