Java ServletRequest.getParameterNames方法代码示例

import javax.servlet.ServletRequest; //导入方法依赖的package包/类
/**
 * Return a map containing all parameters with the given prefix.
 * Maps single values to String and multiple values to String array.
 * <p>For example, with a prefix of "spring_", "spring_param1" and
 * "spring_param2" result in a Map with "param1" and "param2" as keys.
 * @param request HTTP request in which to look for parameters
 * @param prefix the beginning of parameter names
 * (if this is null or the empty string, all parameters will match)
 * @return map containing request parameters <b>without the prefix</b>,
 * containing either a String or a String array as values
 * @see javax.servlet.ServletRequest#getParameterNames
 * @see javax.servlet.ServletRequest#getParameterValues
 * @see javax.servlet.ServletRequest#getParameterMap
 */
public static Map<String, Object> getParametersStartingWith(ServletRequest request, String prefix) {
	Assert.notNull(request, "Request must not be null");
	Enumeration<String> paramNames = request.getParameterNames();
	Map<String, Object> params = new TreeMap<String, Object>();
	if (prefix == null) {
		prefix = "";
	}
	while (paramNames != null && paramNames.hasMoreElements()) {
		String paramName = paramNames.nextElement();
		if ("".equals(prefix) || paramName.startsWith(prefix)) {
			String unprefixed = paramName.substring(prefix.length());
			String[] values = request.getParameterValues(paramName);
			if (values == null || values.length == 0) {
				// Do nothing, no values found at all.
			}
			else if (values.length > 1) {
				params.put(unprefixed, values);
			}
			else {
				params.put(unprefixed, values[0]);
			}
		}
	}
	return params;
}
 

import javax.servlet.ServletRequest; //导入方法依赖的package包/类
/**
 * Return the target page specified in the request.
 * @param request current servlet request
 * @param paramPrefix the parameter prefix to check for
 * (e.g. "_target" for parameters like "_target1" or "_target2")
 * @param currentPage the current page, to be returned as fallback
 * if no target page specified
 * @return the page specified in the request, or current page if not found
 */
public static int getTargetPage(ServletRequest request, String paramPrefix, int currentPage) {
	Enumeration<String> paramNames = request.getParameterNames();
	while (paramNames.hasMoreElements()) {
		String paramName = paramNames.nextElement();
		if (paramName.startsWith(paramPrefix)) {
			for (int i = 0; i < WebUtils.SUBMIT_IMAGE_SUFFIXES.length; i++) {
				String suffix = WebUtils.SUBMIT_IMAGE_SUFFIXES[i];
				if (paramName.endsWith(suffix)) {
					paramName = paramName.substring(0, paramName.length() - suffix.length());
				}
			}
			return Integer.parseInt(paramName.substring(paramPrefix.length()));
		}
	}
	return currentPage;
}
 

import javax.servlet.ServletRequest; //导入方法依赖的package包/类
/**
 * 取得带相同前缀的Request Parameters.
 *
 * 返回的结果的Parameter名已去除前缀.
 */
public static Map<String, Object> getParametersStartingWith(ServletRequest request, String prefix) {
    AssertUtils.notNull(request, "Request must not be null");
    Enumeration paramNames = request.getParameterNames();
    Map<String, Object> params = new TreeMap<String, Object>();
    if (prefix == null) {
        prefix = "";
    }
    while (paramNames != null && paramNames.hasMoreElements()) {
        String paramName = (String) paramNames.nextElement();
        if ("".equals(prefix) || paramName.startsWith(prefix)) {
            String unprefixed = paramName.substring(prefix.length());
            String[] values = request.getParameterValues(paramName);
            if (values == null || values.length == 0) {
                // Do nothing, no values found at all.
            } else if (values.length > 1) {
                params.put(unprefixed, values);
            } else {
                params.put(unprefixed, values[0]);
            }
        }
    }
    return params;
}
 

import javax.servlet.ServletRequest; //导入方法依赖的package包/类
/**
 * 取得带相同前缀的Request Parameters.
 * 
 * 返回的结果的Parameter名已去除前缀.
 */
public static Map<String, Object> getParametersStartingWith(ServletRequest request, String prefix) {
	AssertUtils.notNull(request, "Request must not be null");
	Enumeration paramNames = request.getParameterNames();
	Map<String, Object> params = new TreeMap<String, Object>();
	if (prefix == null) {
		prefix = "";
	}
	while (paramNames != null && paramNames.hasMoreElements()) {
		String paramName = (String) paramNames.nextElement();
		if ("".equals(prefix) || paramName.startsWith(prefix)) {
			String unprefixed = paramName.substring(prefix.length());
			String[] values = request.getParameterValues(paramName);
			if (values == null || values.length == 0) {
				// Do nothing, no values found at all.
			} else if (values.length > 1) {
				params.put(unprefixed, values);
			} else {
				params.put(unprefixed, values[0]);
			}
		}
	}
	return params;
}
 

import javax.servlet.ServletRequest; //导入方法依赖的package包/类
/**
 * 取得带相同前缀的Request Parameters, copy from spring WebUtils.
 * <p>
 * 返回的结果的Parameter名已去除前缀.
 */
@SuppressWarnings("rawtypes")
public static Map<String, Object> getParametersStartingWith(ServletRequest request, String prefix) {
	Validate.notNull(request, "Request must not be null");
	Enumeration paramNames = request.getParameterNames();
	Map<String, Object> params = new TreeMap<String, Object>();
	String pre = prefix;
	if (pre == null) {
		pre = "";
	}
	while (paramNames != null && paramNames.hasMoreElements()) {
		String paramName = (String) paramNames.nextElement();
		if ("".equals(pre) || paramName.startsWith(pre)) {
			String unprefixed = paramName.substring(pre.length());
			String[] values = request.getParameterValues(paramName);
			if (values == null || values.length == 0) {
				values = new String[]{};
				// Do nothing, no values found at all.
			} else if (values.length > 1) {
				params.put(unprefixed, values);
			} else {
				params.put(unprefixed, values[0]);
			}
		}
	}
	return params;
}
 

import javax.servlet.ServletRequest; //导入方法依赖的package包/类
public static void introspect(Object bean, ServletRequest request)
                              throws JasperException
{
    Enumeration<String> e = request.getParameterNames();
    while ( e.hasMoreElements() ) {
        String name  = e.nextElement();
        String value = request.getParameter(name);
        introspecthelper(bean, name, value, request, name, true);
    }
}
 

import javax.servlet.ServletRequest; //导入方法依赖的package包/类
/**
 * 取得带相同前缀的Request Parameters. 返回的结果的Parameter名已去除前缀.
 * 
 * @param request
 *            HttpServletRequest
 * @param prefix
 *            String
 * @return Map
 */
@SuppressWarnings("unchecked")
public static Map<String, Object> getParametersStartingWith(
        ServletRequest request, String prefix) {
    Assert.notNull(request, "Request must not be null");

    Enumeration paramNames = request.getParameterNames();
    Map<String, Object> params = new TreeMap<String, Object>();

    String thePrefix = (prefix == null) ? "" : prefix;

    while (paramNames.hasMoreElements()) {
        String paramName = (String) paramNames.nextElement();

        if ("".equals(thePrefix) || paramName.startsWith(thePrefix)) {
            String unprefixed = paramName.substring(thePrefix.length());
            String[] values = request.getParameterValues(paramName);

            if ((values == null) || (values.length == 0)) {
                // Do nothing, no values found at all.
                continue;
            }

            if (values.length > 1) {
                params.put(unprefixed, values);
            } else {
                params.put(unprefixed, values[0]);
            }
        }
    }

    return params;
}
 

import javax.servlet.ServletRequest; //导入方法依赖的package包/类
public static void introspect(Object bean, ServletRequest request)
                                 throws JasperException
   {
Enumeration e = request.getParameterNames();
while ( e.hasMoreElements() ) {
    String name  = (String) e.nextElement();
    String value = request.getParameter(name);
    introspecthelper(bean, name, value, request, name, true);
}
   }
 

import javax.servlet.ServletRequest; //导入方法依赖的package包/类
/**
 * 取得带相同前缀的Request Parameters, copy from spring WebUtils.
 * 
 * 返回的结果的Parameter名已去除前缀.
 */
@SuppressWarnings("rawtypes")
public static Map<String, Object> getParametersStartingWith(ServletRequest request, String prefix) {
	Validate.notNull(request, "Request must not be null");
	Enumeration paramNames = request.getParameterNames();
	Map<String, Object> params = new TreeMap<String, Object>();
	String pre = prefix;
	if (pre == null) {
		pre = "";
	}
	while (paramNames != null && paramNames.hasMoreElements()) {
		String paramName = (String) paramNames.nextElement();
		if ("".equals(pre) || paramName.startsWith(pre)) {
			String unprefixed = paramName.substring(pre.length());
			String[] values = request.getParameterValues(paramName);
			if (values == null || values.length == 0) {
				values = new String[]{};
				// Do nothing, no values found at all.
			} else if (values.length > 1) {
				params.put(unprefixed, values);
			} else {
				params.put(unprefixed, values[0]);
			}
		}
	}
	return params;
}
 

import javax.servlet.ServletRequest; //导入方法依赖的package包/类
public static void introspect(Object bean, ServletRequest request) throws JasperException {
	Enumeration<String> e = request.getParameterNames();
	while (e.hasMoreElements()) {
		String name = e.nextElement();
		String value = request.getParameter(name);
		introspecthelper(bean, name, value, request, name, true);
	}
}
 

import javax.servlet.ServletRequest; //导入方法依赖的package包/类
/**
     * Time the processing that is performed by all subsequent filters in the
     * current filter stack, including the ultimately invoked servlet.
     *
     * @param request The servlet request we are processing
     * @param result The servlet response we are creating
     * @param chain The filter chain we are processing
     *
     * @exception IOException if an input/output error occurs
     * @exception ServletException if a servlet error occurs
     */
    public void doFilter(ServletRequest request, ServletResponse response,
                         FilterChain chain)
	throws IOException, ServletException {

        if (filterConfig == null)
	    return;

	// Render the generic servlet request properties
	StringWriter sw = new StringWriter();
	PrintWriter writer = new PrintWriter(sw);
	writer.println("Request Received at " +
		       (new Timestamp(System.currentTimeMillis())));
	writer.println(" characterEncoding=" + request.getCharacterEncoding());
	writer.println();
	Enumeration names = request.getParameterNames();
	writer.println( "----------------parameters-----------" );
	while (names.hasMoreElements()) {
	    String name = (String) names.nextElement();
	    writer.print("         " + name + "=");
	    String values[] = request.getParameterValues(name);
	    for (int i = 0; i < values.length; i++) {
	        if (i > 0)
		    writer.print(", ");
		writer.print(values[i]);
	    }
	    writer.println();
	}
//	writer.println("          protocol=" + request.getProtocol());
//	writer.println("        remoteAddr=" + request.getRemoteAddr());
//	writer.println("        remoteHost=" + request.getRemoteHost());
//	writer.println("            scheme=" + request.getScheme());
//	writer.println("        serverName=" + request.getServerName());
//	writer.println("        serverPort=" + request.getServerPort());
//	writer.println("          isSecure=" + request.isSecure());

	// Render the HTTP servlet request properties
	if (request instanceof HttpServletRequest) {
	    writer.println("---------------------------------------------");
	    HttpServletRequest hrequest = (HttpServletRequest) request;
	   //writer.println("       contextPath=" + hrequest.getContextPath());
	    
//	    names = hrequest.getHeaderNames();
//	    while (names.hasMoreElements()) {
//	        String name = (String) names.nextElement();
//		String value = hrequest.getHeader(name);
//	        writer.println("            header=" + name + "=" + value);
//	    }
	    //writer.println("            method=" + hrequest.getMethod());
	    writer.println("          pathInfo=" + hrequest.getPathInfo());
	    writer.println("       queryString=" + hrequest.getQueryString());
	    //writer.println("        remoteUser=" + hrequest.getRemoteUser());
	    //writer.println("requestedSessionId=" +
		//	   hrequest.getRequestedSessionId());
	    writer.println("        requestURI=" + hrequest.getRequestURI());
	    writer.println("       servletPath=" + hrequest.getServletPath());
	}
	writer.println("=============================================");
	System.out.println( sw.getBuffer().toString() );
	// Log the resulting string
	writer.flush();
	filterConfig.getServletContext().log(sw.getBuffer().toString());

	// Pass control on to the next filter
        chain.doFilter(request, response);

    }