JavaWeb解决xss漏洞

1.首先编写过滤器

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;

/**
 * 过滤器
 * */
public class XSSFilter implements Filter {
    /**
     * 重写父类方法
     * */
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }
    /**
     * 重写父类方法
     * */
    @Override
    public void destroy() {
    }
    /**
     * 重写父类方法
     * */
    @Override
    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {

        /*
         * //设置request字符编码 request.setCharacterEncoding("UTF-8");
         * //设置response字符编码 response.setContentType("text/html;charset=UTF-8");
         */

        chain.doFilter(new XSSRequestWrapper((HttpServletRequest) request),
                response);

    }
}

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.util.regex.Pattern;


public class XSSRequestWrapper extends HttpServletRequestWrapper {
    /**
     * 构造方法
     * */
    public XSSRequestWrapper(HttpServletRequest servletRequest) {
        super(servletRequest);
    }

    /**
     * 重写父类方法
     * */
    @Override
    public String[] getParameterValues(String parameter) {
        String[] values = super.getParameterValues(parameter);
        if (values == null) {
            return values;
        }
        int count = values.length;
        String[] encodedValues = new String[count];
        for (int i = 0; i < count; i++) {
            encodedValues[i] = stripXSS(values[i], parameter);
        }
        return encodedValues;
    }

    /**
     * 重写父类方法
     * */
    @Override
    public String getParameter(String parameter) {
        String value = super.getParameter(parameter);
        return stripXSS(value, parameter);
    }

    /**
     * 重写父类方法
     * */
    @Override
    public String getHeader(String name) {
        String value = super.getHeader(name);
        return stripXSS(value, name);
    }

    /**
     * 过滤参数
     * @param value 参数值
     * @param parameter 参数name名
     * @return
     */
    private String stripXSS(String value, String parameter) {
        String valueNew = value;

        if("keyWords".equals(parameter)){
            System.out.println("==========================");
        }
        if (getNoCheckParameter(parameter) && valueNew != null) {
            valueNew = valueNew.replaceAll("", "");
            //将<script>进行置换
            Pattern scriptPattern = Pattern.compile("<script>(.*?)</script>",
                    Pattern.CASE_INSENSITIVE);
            valueNew = scriptPattern.matcher(valueNew).replaceAll("");

            scriptPattern = Pattern.compile("[%<>\"]+");
            valueNew = scriptPattern.matcher(valueNew).replaceAll("");

        }
        return valueNew;
    }

    /**
     * 判断name是否应该拦截
     * @param parameter 参数名
     * @return 不拦截返回true，拦截返回false
     */

    private boolean getNoCheckParameter(String parameter) {
        String[] noFilterURLs = new String[] { "content","otherName"};
        for (String parameters : noFilterURLs) {
            if (parameter.equals(parameters)) {
                return false;
            }
        }
        return true;
    }
}

2.web.xml中配置滤波器

<!-- 解决xss漏洞 --> 
  <filter>  
    <filter-name>xssFilter</filter-name>  
     <filter-class>com.util.XSSFilter</filter-class>  
  </filter>  


  <filter-mapping>  
    <filter-name>xssFilter</filter-name>  
    <url-pattern>/*</url-pattern>  
  </filter-mapping> 

3.spring注解形式

import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;

import javax.servlet.Filter;

@Component
public class XSSFilterRegistration {
    /**
     * 配置过滤器
     * @return
     */
    @Bean
    @Order(Integer.MAX_VALUE)
    public FilterRegistrationBean xssFilterRegistration() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(XSSFilter());
        registration.addUrlPatterns("/*");
        //registration.setOrder(Integer.MAX_VALUE);//过滤器顺序，也可通过@Order注解配置
        //registration.addInitParameter("paramName", "paramValue");
        registration.setName("XSSFilter");
        return registration;
    }

    /**
     * 创建一个bean
     * @return
     */
    @Bean(name = "XSSFilter")
    public Filter XSSFilter() {
        return new XSSFilter();
    }
}