java读取properties文件

 1 package org.properties.test;
 2 
 3 import java.io.IOException;
 4 import java.io.InputStream;
 5 import java.util.Enumeration;
 6 import java.util.Properties;
 7 
 8 import org.junit.Test;
 9 
10 public class PropertiesTest {
11 
12     /**
13      * @param args
14      */
15     @Test
16     public void test() {
17         
18         Properties pps = System.getProperties();
19         pps.list(System.out);
20     }
21 
22     @Test
23     public void test02() throws IOException {
24         
25         InputStream is=PropertiesTest.class.getClassLoader().getResourceAsStream("test.properties");
26         
27         Properties p=new Properties();
28         p.load(is);
29         
30         Enumeration enum1 = p.propertyNames();//得到配置文件的名字
31         while(enum1.hasMoreElements()) {
32              String strKey = (String) enum1.nextElement();
33              String strValue = p.getProperty(strKey);
34              System.out.println(strKey + "---" + strValue);
35           }
36     }
37 }

 1 -- listing properties --
 2 java.runtime.name=Java(TM) SE Runtime Environment
 3 sun.boot.library.path=C:\Program Files\Java\jdk1.7.0_79\jre...
 4 java.vm.version=24.79-b02
 5 java.vm.vendor=Oracle Corporation
 6 maven.multiModuleProjectDirectory=$MAVEN_HOME
 7 java.vendor.url=http://java.oracle.com/
 8 path.separator=;
 9 java.vm.name=Java HotSpot(TM) 64-Bit Server VM
10 file.encoding.pkg=sun.io
11 user.script=
12 user.country=CN
13 sun.java.launcher=SUN_STANDARD
14 sun.os.patch.level=
15 java.vm.specification.name=Java Virtual Machine Specification
16 user.dir=E:\tools\MyEclipse\MyEclipse 10\Works...
17 java.runtime.version=1.7.0_79-b15
18 java.awt.graphicsenv=sun.awt.Win32GraphicsEnvironment
19 java.endorsed.dirs=C:\Program Files\Java\jdk1.7.0_79\jre...
20 os.arch=amd64
21 java.io.tmpdir=C:\Users\duchong\AppData\Local\Temp22 line.separator=
23 
24 java.vm.specification.vendor=Oracle Corporation
25 user.variant=
26 os.name=Windows 8.1
27 sun.jnu.encoding=GBK
28 java.library.path=C:\Program Files\Java\jdk1.7.0_79\bin...
29 java.specification.name=Java Platform API Specification
30 java.class.version=51.0
31 sun.management.compiler=HotSpot 64-Bit Tiered Compilers
32 os.version=6.3
33 user.home=C:\Users\duchong
34 user.timezone=
35 java.awt.printerjob=sun.awt.windows.WPrinterJob
36 file.encoding=UTF-8
37 java.specification.version=1.7
38 user.name=duchong
39 java.class.path=E:\tools\MyEclipse\MyEclipse 10\Works...
40 java.vm.specification.version=1.7
41 sun.arch.data.model=64
42 java.home=C:\Program Files\Java\jdk1.7.0_79\jre
43 sun.java.command=org.eclipse.jdt.internal.junit.runner...
44 java.specification.vendor=Oracle Corporation
45 user.language=zh
46 awt.toolkit=sun.awt.windows.WToolkit
47 java.vm.info=mixed mode
48 java.version=1.7.0_79
49 java.ext.dirs=C:\Program Files\Java\jdk1.7.0_79\jre...
50 sun.boot.class.path=C:\Program Files\Java\jdk1.7.0_79\jre...
51 java.vendor=Oracle Corporation
52 file.separator=53 java.vendor.url.bug=http://bugreport.sun.com/bugreport/
54 sun.cpu.endian=little
55 sun.io.unicode.encoding=UnicodeLittle
56 sun.desktop=windows
57 sun.cpu.isalist=amd64

 1 public static Connection getConnection2() throws Exception{
 2     String driverClass = null;
 3     String jdbcUrl = null;
 4     String user = null;
 5     String password = null;
 6 
 7     // 读取类路径下的jdbc.properties文件
 8     InputStream in =DBUtil.class.getClassLoader().getResourceAsStream("jdbc.properties");
 9     Properties properties = new Properties();
10     properties.load(in);
11     driverClass = properties.getProperty("driver");
12     jdbcUrl = properties.getProperty("jdbcUrl");
13     user = properties.getProperty("user");
14     password = properties.getProperty("password");
15 
16     Driver driver = (Driver)Class.forName(driverClass).newInstance();
17 
18     Properties info = new Properties();
19     info.put("user", user);
20     info.put("password", password);
21 
22     Connection connection = driver.connect(jdbcUrl, info);
23     return connection;
24     }