struts2 源码分析 request ---设置setParameters 的值
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? ? strtus2通过 ServletActionContext.getRequest() 获取Request。
??? 获取的Request对象有可能是MultiPartRequestWrapper也有可能是StrutsRequestWrapper
??? 为了动态像Request设置值，通过源码了解。通过以下方法可以动态获取值。
??? 如果没有用strtus2中获取的Request是原生的Request的话，就直接可以通过
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package com.dep.aop;import java.util.HashMap;import java.util.Iterator;import java.util.Map;import java.util.Set;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletRequestWrapper;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import com.dep.util.StringUtil;/** * 拦截防止sql注入 * @author wb_zypt * */public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper {HttpServletRequest orgRequest = null;Map newParams = null;private static Logger log = LoggerFactory.getLogger(XssHttpServletRequestWrapper.class);public XssHttpServletRequestWrapper(HttpServletRequest request) {super(request);orgRequest = request;}/*** 覆盖getParameter方法，将参数名和参数值都做xss过滤。<br/>* 如果需要获得原始的值，则通过super.getParameterValues(name)来获取<br/>* getParameterNames,getParameterValues和getParameterMap也可能需要覆盖*/@Overridepublic String getParameter(String name) {String value = super.getParameter(StringUtil.filterDangerString(name));if (value != null) {value = StringUtil.filterDangerString(value);}if(value == null){value = (String)getParameterMap().get(name);}return value;}@Override@SuppressWarnings("unchecked")public Map getParameterMap() {if(newParams !=null){return newParams;}else{newParams = new HashMap();}//Map newParams = new HashMap();Map params = super.getParameterMap();Set<String> keySet = params.keySet(); for (Iterator iterator = keySet.iterator(); iterator.hasNext();) { String key = (String) iterator.next(); Object obj = params.get(key); if(obj instanceof String){ String str = (String) params.get(key); newParams.put(key, StringUtil.filterDangerString((String)str)); }else if(obj.getClass() == String[].class){ String[] str = (String[]) params.get(key); newParams.put(key, xssEncode((String[])str)); }else{ newParams.put(key, obj); } }/*java.lang.reflect.Field lockedField = null;try {lockedField = params.getClass().getDeclaredField("locked");lockedField.setAccessible(true);lockedField.set(params, false);} catch (Exception e) {log.error(e.getMessage(), e);}Set<String> keySet = params.keySet(); for (Iterator iterator = keySet.iterator(); iterator.hasNext();) { String key = (String) iterator.next(); Object obj = params.get(key); if(obj instanceof String){ String str = (String) params.get(key); params.put(key, xssEncode((String)str)); }else{ String[] str = (String[]) params.get(key); params.put(key, xssEncode((String[])str)); } } if(lockedField!=null){ try {lockedField.set(params, true);} catch (Exception e) {log.error(e.getMessage(), e);} }*/return newParams;}public String[] getParameterValues(String parameter) { String[] values = super.getParameterValues(parameter); if (values==null) { return null; } int count = values.length; String[] encodedValues = new String[count]; for (int i = 0; i < count; i++) { encodedValues[i] = StringUtil.filterDangerString(values[i]); } return encodedValues; }/*** 覆盖getHeader方法，将参数名和参数值都做xss过滤。<br/>* 如果需要获得原始的值，则通过super.getHeaders(name)来获取<br/>* getHeaderNames 也可能需要覆盖*/@Overridepublic String getHeader(String name) {String value = super.getHeader(StringUtil.filterDangerString(name));if (value != null) {value = StringUtil.filterDangerString(value);}return value;}private static String[] xssEncode(String[] s) {String[] newStr = new String[s.length];for(int i=0;i<s.length;i++){newStr[i]= StringUtil.filterDangerString(s[i]);}return newStr;}/*** 获取最原始的request** @return*/public HttpServletRequest getOrgRequest() {return orgRequest;}/*** 获取最原始的request的静态方法** @return*/public static HttpServletRequest getOrgRequest(HttpServletRequest req) {if (req instanceof XssHttpServletRequestWrapper) {return ((XssHttpServletRequestWrapper) req).getOrgRequest();}return req;}}?
