当前页面: 开发资料首页 → Java 专题 → request参数接收解析工具

request参数接收解析工具

摘要: request参数接收解析工具

</td> </tr> <tr> <td height="35" valign="top" class="ArticleTeitle"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="52" align="center" valign="top"> </td> </tr> <tr> <td height="14">


  

import java.util.ArrayList;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

public class ParamUtils

{

    public ParamUtils()

    {

    }

    public static String getParameter(HttpServletRequest request, String name)

    {

        return getParameter(request, name, false);

    }

    public static String getParameter(HttpServletRequest request, String name, String defaultValue)

    {

        return getParameter(request, name, defaultValue, false);

    }

    public static String getParameter(HttpServletRequest request, String name, boolean emptyStringsOK)

    {

        return getParameter(request, name, null, emptyStringsOK);

    }

    public static String getParameter(HttpServletRequest request, String name, String defaultValue, boolean emptyStringsOK)

    {

        String temp = request.getParameter(name);

        if(temp != null)

        {

            if(temp.equals("") && !emptyStringsOK)

                return defaultValue;

            else

                return temp;

        } else

        {

            return defaultValue;

        }

    }

    public static String[] getParameters(HttpServletRequest request, String name)

    {

        if(name == null)

            return new String[0];

        String paramValues[] = request.getParameterValues(name);

        if(paramValues == null || paramValues.length == 0)

            return new String[0];

        List values = new ArrayList(paramValues.length);

        for(int i = 0; i < paramValues.length; i++)

            if(paramValues[i] != null && !"".equals(paramValues[i]))

                values.add(paramValues[i]);

        return (String[])values.toArray(new String[0]);

    }

    public static boolean getBooleanParameter(HttpServletRequest request, String name)

    {

        return getBooleanParameter(request, name, false);

    }

    public static boolean getBooleanParameter(HttpServletRequest request, String name, boolean defaultVal)

    {

        String temp = request.getParameter(name);

        if("true".equals(temp) || "on".equals(temp))

            return true;

        if("false".equals(temp) || "off".equals(temp))

            return false;

        else

            return defaultVal;

    }

    public static int getIntParameter(HttpServletRequest request, String name, int defaultNum)

    {

        String temp = request.getParameter(name);

        if(temp != null && !temp.equals(""))

        {

            int num = defaultNum;

            try

            {

                num = Integer.parseInt(temp.trim());

            }

            catch(Exception ignored) { }

            return num;

        } else

        {

            return defaultNum;

        }

    }

    public static int[] getIntParameters(HttpServletRequest request, String name, int defaultNum)

    {

        String paramValues[] = request.getParameterValues(name);

        if(paramValues == null || paramValues.length == 0)

            return new int[0];

        int values[] = new int[paramValues.length];

        for(int i = 0; i < paramValues.length; i++)

            try

            {

                values[i] = Integer.parseInt(paramValues[i].trim());

            }

            catch(Exception e)

            {

                values[i] = defaultNum;

            }

        return values;

    }

    public static double getDoubleParameter(HttpServletRequest request, String name, double defaultNum)

    {

        String temp = request.getParameter(name);

        if(temp != null && !temp.equals(""))

        {

            double num = defaultNum;

            try

            {

                num = Double.parseDouble(temp.trim());

            }

            catch(Exception ignored) { }

            return num;

        } else

        {

            return defaultNum;

        }

    }

    public static long getLongParameter(HttpServletRequest request, String name, long defaultNum)

    {

        String temp = request.getParameter(name);

        if(temp != null && !temp.equals(""))

        {

            long num = defaultNum;

            try

            {

                num = Long.parseLong(temp.trim());

            }

            catch(Exception ignored) { }

            return num;

        } else

        {

            return defaultNum;

        }

    }

    public static long[] getLongParameters(HttpServletRequest request, String name, long defaultNum)

    {

        String paramValues[] = request.getParameterValues(name);

        if(paramValues == null || paramValues.length == 0)

            return new long[0];

        long values[] = new long[paramValues.length];

        for(int i = 0; i < paramValues.length; i++)

            try

            {

                values[i] = Long.parseLong(paramValues[i].trim());

            }

            catch(Exception e)

            {

                values[i] = defaultNum;

            }

        return values;

    }

    public static String getAttribute(HttpServletRequest request, String name)

    {

        return getAttribute(request, name, false);

    }

    public static String getAttribute(HttpServletRequest request, String name, boolean emptyStringsOK)

    {

        String temp = (String)request.getAttribute(name);

        if(temp != null)

        {

            if(temp.equals("") && !emptyStringsOK)

                return null;

            else

                return temp;

        } else

        {

            return null;

        }

    }

    public static boolean getBooleanAttribute(HttpServletRequest request, String name)

    {

        String temp = (String)request.getAttribute(name);

        return temp != null && temp.equals("true");

    }

    public static int getIntAttribute(HttpServletRequest request, String name, int defaultNum)

    {

        String temp = (String)request.getAttribute(name);

        if(temp != null && !temp.equals(""))

        {

            int num = defaultNum;

            try

            {

                num = Integer.parseInt(temp.trim());

            }

            catch(Exception ignored) { }

            return num;

        } else

        {

            return defaultNum;

        }

    }

    public static long getLongAttribute(HttpServletRequest request, String name, long defaultNum)

    {

        String temp = (String)request.getAttribute(name);

        if(temp != null && !temp.equals(""))

        {

            long num = defaultNum;

            try

            {

                num = Long.parseLong(temp.trim());

            }

            catch(Exception ignored) { }

            return num;

        } else

        {

            return defaultNum;

        }

    }

}

</td> </tr> </table> function TempSave(ElementID) { CommentsPersistDiv.setAttribute("CommentContent",document.getElementById(ElementID).value); CommentsPersistDiv.save("CommentXMLStore"); } function Restore(ElementID) { CommentsPersistDiv.load("CommentXMLStore"); document.getElementById(ElementID).value=CommentsPersistDiv.getAttribute("CommentContent"); } </td> </tr> <tr>

↑返回目录
前一篇: 使用final变量需要注意
后一篇: 接口与抽象类