How to read the DB. properties file using Java

When reading the properties file, there were more or less strange issues. Here we will describe the final method of success.

Proputil tool class

public class PropUtil {private String filePath = null;public PropUtil(String fileName) {this.filePath = getClass().getClassLoader().getResource("/").getPath();filePath = filePath.substring(1, filePath.length() - 8) + fileName;// fixed tomcat readpath problem dml@2012.9.12filePath = filePath.replaceAll("%20", " ");}public Properties getProp() {Properties prop = new Properties();try {InputStream in = new BufferedInputStream(new FileInputStream(filePath));prop.load(in);in.close();} catch (Exception err) {err.printStackTrace();}return prop;}}

This tool class object can be directly instantiated during the call.

public static Connection getConnect() {PropUtil pu = new PropUtil("DB.properties");Properties p = pu.getProp();Connection con = null;try {String url = p.getProperty("url");String Driver = p.getProperty("driver");String user = p.getProperty("userName");String pwd = p.getProperty("password");Class.forName(Driver);con = DriverManager.getConnection(url, user, pwd);if (con == null) {System.out.println("can not find con");}} catch (Exception e) {System.out.println("conn bad!");e.printStackTrace();}return con;}

The above is the final configuration method in Tomcat.