paramutils.java

来自「J2EE网络书店系统 采用JSP , servlet ,javabean开发 」· Java 代码 · 共 90 行

/*
 * 创建日期 2005-3-7
 *
 * TODO 要更改此生成的文件的模板，请转至
 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */
package store;

/**
 * @author wwx
 *
 * TODO 要更改此生成的类型注释的模板，请转至
 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */

import javax.servlet.http.HttpServletRequest;

public class ParamUtils {
	  public ParamUtils()
	  {
	  }

	  private static String getString(HttpServletRequest httpservletrequest, String s)
	  {
	      String s1 = null;
	      try
	      {
	          s1 = httpservletrequest.getParameter(s).trim();
	      }
	      catch(Exception exception) { }
	      return s1;
	  }

	  public static String getString(HttpServletRequest httpservletrequest, String s, String s1)
	      throws Exception
	  {
	      String s2 = getString(httpservletrequest, s);
	      if(s2 == null)
	          return s1;
	      else
	          return s2;
	  }

	  public static int getInt(HttpServletRequest httpservletrequest, String s, int i)
	  {
	      String s1 = getString(httpservletrequest, s);
	      if(s1 == null)
	          return i;
	      try
	      {
	        return Integer.parseInt(s1);
	      }catch(NumberFormatException numberformatexception)
	      {
	        return 0;
	      }
	  }

	  public static long getLong(HttpServletRequest httpservletrequest, String s, long l)
	  {
	      String s1 = getString(httpservletrequest, s);
	      if(s1 == null)
	          return l;
	      try
	      {
	      return Long.parseLong(s1);
	      }catch
	      (NumberFormatException numberformatexception)
	      {
	        return 0L;
	      }
	  }

	  public static String getallstring(HttpServletRequest httpservletrequest, String s)
	  {
	      String s1 = "";
	      try
	      {
	          String as[] = httpservletrequest.getParameterValues(s);
	          if(as == null)
	              throw new Exception("Not any value was selected!<br>");
	          for(int i = 0; i < as.length; i++)
	              s1 = s1 + as[i];

	      }
	      catch(Exception exception) { }
	      return s1;
	    }

}