struts2如何防止XSS脚本攻击（XSS防跨站脚本攻击过滤器）

只需要配置一个拦截器即可解决参数内容替换

一、配置web.xml

		struts-xssFilter
		*.*.filters.XssFilter
	
	
		struts-xssFilter
		/*
	

二、编写XssFilter

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
public class XssFilter implements Filter{
    FilterConfig filterConfig = null;
    /**
     * Default constructor.
     */
    public XssFilter() {
    }
    public void destroy() {
        this.filterConfig = null;
    }
    public void init(FilterConfig fConfig) throws ServletException {
        this.filterConfig = fConfig;
    }
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest) request;
        String url = req.getRequestURI();
        //过滤不需要拦截的action
        if(url.indexOf("*.action") != -1){
            chain.doFilter(request, response);
        }else{
            chain.doFilter(new XssHttpServletRequestWrapper((HttpServletRequest) request), response);
        }
    }
}

三、XssHttpServletRequestWrapper 实现 StrutsRequestWrapper完成参数替换

import cn.hutool.http.HtmlUtil;
import org.apache.commons.lang.StringUtils;
import org.apache.struts2.dispatcher.StrutsRequestWrapper;
import org.springframework.util.CollectionUtils;
import javax.servlet.http.HttpServletRequest;
import java.util.Enumeration;
import java.util.Map;
import java.util.regex.Pattern;
public class XssHttpServletRequestWrapper extends StrutsRequestWrapper {
    HttpServletRequest orgRequest = null;
    public XssHttpServletRequestWrapper(HttpServletRequest servletRequest) {
        super(servletRequest);
        orgRequest = servletRequest;
    }
    /**
     * 重写getParameterValues方法
     * 通过循环取出每一个请求结果
     * 再对请求结果进行过滤
     * */
    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  
四、pom需要引入hutool
 
            cn.hutool
            hutool-all
            5.6.0
        
 
五、测试结果通过