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| 关键词： nbsp String java Date view props IOException getProperty password new |
1. 字符串有整型的相互转换[java] view plaincopyString a = String.valueOf(2); //integer to numeric string int i = Integer.parseInt(a); //numeric string to an int 2. 向文件末尾添加内容[java] view plaincopyBufferedWriter out = null; try { out = new BufferedWriter(new FileWriter(”filename”, true)); out.write(”aString”); } catch (IOException e) { // error processing code } finally { if (out != null) { out.close(); } } 3. 得到当前方法的名字 [java] view plaincopy<span style="font-family:Arial;font-size:14px;">String methodName = Thread.currentThread().getStackTrace()[1].getMethodName(); </span> 4. 转字符串到日期[java] view plaincopyjava.util.Date = java.text.DateFormat.getDateInstance().parse(date String); 或者是：[java] view plaincopySimpleDateFormat format = new SimpleDateFormat( "dd.MM.yyyy" ); Date date = format.parse( myString ); 5. 使用JDBC链接Oracle[java] view plaincopypublic class OracleJdbcTest { String driverClass = "oracle.jdbc.driver.OracleDriver"; Connection con; public void init(FileInputStream fs) throws ClassNotFoundException, SQLException, FileNotFoundException, IOException { Properties props = new Properties(); props.load(fs); String url = props.getProperty("db.url"); String userName = props.getProperty("db.user"); String password = props.getProperty("db.password"); Class.forName(driverClass); con=DriverManager.getConnection(url, userName, password); } public void fetch() throws SQLException, IOException { PreparedStatement ps = con.prepareStatement("select SYSDATE from dual"); ResultSet rs = ps.executeQuery(); while (rs.next()) { // do the thing you do } rs.close(); ps.close(); } public static void main(String[] args) { OracleJdbcTest test = new OracleJdbcTest(); test.init(); test.fetch(); } } 6. 把 Java util.Date 转成 sql.Date
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