Java实用片段

向文件末尾添加内容

BufferedWriter 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();      }  }

转字符串到日期

SimpleDateFormat format = new SimpleDateFormat( "dd.MM.yyyy" );  Date date = format.parse( myString );

把 Java util.Date 转成 sql.Date

java.util.Date utilDate = new java.util.Date();  java.sql.Date sqlDate = new java.sql.Date(utilDate.getTime());