java 读取属性文件（转）

如何读取资源文件：
（一）
Properties props = new Properties();????
props.load(new FileInputStream("db.properties"));（二）
blog.properties文件如下dbdriver=oracle.jdbc.driver.OracleDriver
dburl=jdbc:oracle:thin:@127.0.0.1:1521:ora92
dbuser=blog
dbpwd=blog--------------public class Config {? public Config() {
??? this.initDBConfig();
? }? public String DBdriver;
? public String DBuser;
? public String DBpwd;
? public String DBurl;? private void initDBConfig() {
??? try {
????? ResourceBundle bundle = ResourceBundle.getBundle("blog");
????? DBdriver = bundle.getString("dbdriver");
????? DBurl = bundle.getString("dburl");
????? DBuser = bundle.getString("dbuser");
????? DBpwd = bundle.getString("dbpwd");
??? }
??? catch (Exception ex) {
????? ex.printStackTrace();
??? }? }}----------------public class DAO {
? public DAO() {
? }? public Connection getConnection() {
??? Connection conn = null;
??? Config config = new Config();
??? String DBdriver = config.DBdriver;
??? String DBuser = config.DBuser;
??? String DBpwd = config.DBpwd;
??? String DBurl = config.DBurl;
??? try {
????? Class.forName(DBdriver);
????? conn = DriverManager.getConnection(DBurl, DBuser, DBpwd);
??? }
??? catch (Exception ex) {
????? System.out.println("********************");
????? System.out.println("不能得到数据库连接");
????? System.out.println("DBdriver: " + DBdriver);
????? System.out.println("DBuser: " + DBuser);
????? System.out.println("DBpwd: " + DBpwd);
????? System.out.println("DBurl: " + DBurl);
????? ex.printStackTrace();
??? }
??? return conn;
? }}（三）
?Properties props=new Properties();
?props.load(BugFactory.class.getResourceAsStream("xx.properties"));
?String name = props.getPropery("xxxx");
?此时xx.properties应该与该类放在同一个目录.（四）
?ResourceBundle res = ResourceBundle.getBundle("yy.properties");
?String name = res.getString("yyyy");
?yy.properties应放在/WEB-INF/classes目录（五）
如果你这个Bean打包的话，就把这个文件放在包内。我一般是这样写的
Properties prop = new Properties();
try
{
?InputStream is?= getClass().getResourceAsStream("db.properties");
?prop.load(is);
?if(is!=null)
??? is.close();
}另：
props.load(new FileInputStream("db.properties")); 是读取当前目录的db.properties文件
getClass.getResourceAsStream("db.properties"); 是读取当前类所在位置一起的db.properties文件
getClass.getResourceAsStream("/db.properties"); 是读取ClassPath的根的db.properties文件,注意ClassPath如果是多个路径或者jar文件的,只要在任意一个路径目录下或者jar文件里的根下都可以,如果存在于多个路径下的话,按照ClassPath中的先后顺序,使用先找到的,其余忽略.