spring boot 使用过滤器过滤非法字符

有时候我们要配置我们自己的定义非法字符过滤，但 HttpServletRequest 对象是不可以改变的，那我们只好定义一个类，成为它的子类，重写它的方法，这样在Servelt中使用它方法时候，

就会进入我们重写方法，从而实现过滤

1、创建一个HTML过滤类，我过滤的是 html 和 xss，当然你们自己定义你们的过滤规则

package io.xiongdi.common.xss;

import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.logging.Logger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author wujiaxing
 * @date 2019-07-09
 */
public final class HTMLFilter {

    /**
     * regex flag union representing /si modifiers in php
     **/
    private static final int REGEX_FLAGS_SI = Pattern.CASE_INSENSITIVE | Pattern.DOTALL;
    private static final Pattern P_COMMENTS = Pattern.compile("<!--(.*?)-->", Pattern.DOTALL);
    private static final Pattern P_COMMENT = Pattern.compile("^!--(.*)--$", REGEX_FLAGS_SI);
    private static final Pattern P_TAGS = Pattern.compile("<(.*?)>", Pattern.DOTALL);
    private static final Pattern P_END_TAG = Pattern.compile("^/([a-z0-9]+)", REGEX_FLAGS_SI);
    private static final Pattern P_START_TAG = Pattern.compile("^([a-z0-9]+)(.*?)(/?)$", REGEX_FLAGS_SI);
    private static final Pattern P_QUOTED_ATTRIBUTES = Pattern.compile("([a-z0-9]+)=(["'])(.*?)\2", REGEX_FLAGS_SI);
    private static final Pattern P_UNQUOTED_ATTRIBUTES = Pattern.compile("([a-z0-9]+)(=)([^"\s']+)", REGEX_FLAGS_SI);
    private static final Pattern P_PROTOCOL = Pattern.compile("^([^:]+):", REGEX_FLAGS_SI);
    private static final Pattern P_ENTITY = Pattern.compile("&#(\d+);?");
    private static final Pattern P_ENTITY_UNICODE = Pattern.compile("&#x([0-9a-f]+);?");
    private static final Pattern P_ENCODE = Pattern.compile("%([0-9a-f]{2});?");
    private static final Pattern P_VALID_ENTITIES = Pattern.compile("&([^&;]*)(?=(;|&|$))");
    private static final Pattern P_VALID_QUOTES = Pattern.compile("(>|^)([^<]+?)(<|$)", Pattern.DOTALL);
    private static final Pattern P_END_ARROW = Pattern.compile("^>");
    private static final Pattern P_BODY_TO_END = Pattern.compile("<([^>]*?)(?=<|$)");
    private static final Pattern P_XML_CONTENT = Pattern.compile("(^|>)([^<]*?)(?=>)");
    private static final Pattern P_STRAY_LEFT_ARROW = Pattern.compile("<([^>]*?)(?=<|$)");
    private static final Pattern P_STRAY_RIGHT_ARROW = Pattern.compile("(^|>)([^<]*?)(?=>)");
    private static final Pattern P_AMP = Pattern.compile("&");
    private static final Pattern P_QUOTE = Pattern.compile("<");
    private static final Pattern P_LEFT_ARROW = Pattern.compile("<");
    private static final Pattern P_RIGHT_ARROW = Pattern.compile(">");
    private static final Pattern P_BOTH_ARROWS = Pattern.compile("<>");

    private static final ConcurrentMap<String, Pattern> P_REMOVE_PAIR_BLANKS = new ConcurrentHashMap<String, Pattern>();
    private static final ConcurrentMap<String, Pattern> P_REMOVE_SELF_BLANKS = new ConcurrentHashMap<String, Pattern>();

    /**
     * 一组允许的html元素，以及元素允许的属性
     */
    private final Map<String, List<String>> vAllowed;

    /**
     * 每个(允许的)html元素的打开标记数
     */
    private final Map<String, Integer> vTagCounts = new HashMap<String, Integer>();

    /**
     * 必须总是自关闭的html元素(例如。“< img / >
     */
    private final String[] vSelfClosingTags;

    /**
     * 必须始终具有独立的开始和结束标记的html元素(例如。“< b > < / b >”)
     */
    private final String[] vNeedClosingTags;

    /**
     * 一组不允许的html元素
     */
    private final String[] vDisallowed;

    /**
     * 属性，应检查这些属性是否为有效协议
     */
    private final String[] vProtocolAtts;

    /**
     * 允许协议
     */
    private final String[] vAllowedProtocols;

    /**
     * 如果标签不包含任何内容(例如"<b></b>"或"<b />")
     */
    private final String[] vRemoveBlanks;

    /**
     * html标记中允许的实体
     */
    private final String[] vAllowedEntities;

    /**
     * 标志，确定输入字符串中是否允许注释。
     */
    private final boolean stripComment;

    /**
     * 编码引用
     */
    private final boolean encodeQuotes;

    private boolean vDebug = false;

    /**
     * 标记决定是否尝试在呈现“不平衡的”标记时制作标记
     * 尖括号(如。“<b text </b>”变为“<b> text </b>”)。
     * 如果设为false，不平衡的尖括号将被html转义。
     */
    private final boolean alwaysMakeTags;

    public HTMLFilter() {
        this.vAllowed = new HashMap<>();

        final ArrayList<String> aAtts = new ArrayList<>();
        aAtts.add("href");
        aAtts.add("target");
        vAllowed.put("a", aAtts);

        final ArrayList<String> imgAtts = new ArrayList<>();
        imgAtts.add("src");
        imgAtts.add("width");
        imgAtts.add("height");
        imgAtts.add("alt");
        vAllowed.put("img", imgAtts);

        final ArrayList<String> noAtts = new ArrayList<>();
        vAllowed.put("b", noAtts);
        vAllowed.put("strong", noAtts);
        vAllowed.put("i", noAtts);
        vAllowed.put("em", noAtts);

        this.vSelfClosingTags = new String[]{"img"};

        this.vNeedClosingTags = new String[]{"a", "b", "strong", "i", "em"};

        this.vDisallowed = new String[]{};

        this.vProtocolAtts = new String[]{"src", "href"};

        this.vAllowedProtocols = new String[]{"http", "mailto", "https"};

        this.vRemoveBlanks = new String[]{"a", "b", "strong", "i", "em"};

        this.vAllowedEntities = new String[]{"amp", "lt", "gt", "quot"};

        this.stripComment = true;
        this.encodeQuotes = true;
        this.alwaysMakeTags = true;
    }

    public HTMLFilter(boolean vDebug) {
        this();
        this.vDebug = vDebug;
    }

    /**
     * 带map参数的构造函数
     * assert 后面跟个冒号表达式。如果冒号前为 true，则冒号后面的被忽略。
     * 如果冒号前为false，则抛出AssertionError ，错误信息内容为冒号后面的内容
     *
     * @param conf 包含配置的conf映射。键匹配字段名
     */
    public HTMLFilter(final Map<String, Object> conf) {
        assert conf.containsKey("vAllowed") : "configuration requires vAllowed";
        assert conf.containsKey("vSelfClosingTags") : "configuration requires vSelfClosingTags";
        assert conf.containsKey("vNeedClosingTags") : "configuration requires vNeedClosingTags";
        assert conf.containsKey("vDisallowed") : "configuration requires vDisallowed";
        assert conf.containsKey("vAllowedProtocols") : "configuration requires vAllowedProtocols";
        assert conf.containsKey("vProtocolAtts") : "configuration requires vProtocolAtts";
        assert conf.containsKey("vRemoveBlanks") : "configuration requires vRemoveBlanks";
        assert conf.containsKey("vAllowedEntities") : "configuration requires vAllowedEntities";

        vAllowed = Collections.unmodifiableMap((Map<String, List<String>>) conf.get("vAllowed"));
        vSelfClosingTags = (String[]) conf.get("vSelfClosingTags");
        vNeedClosingTags = (String[]) conf.get("vNeedClosingTags");
        vDisallowed = (String[]) conf.get("vDisallowed");
        vAllowedProtocols = (String[]) conf.get("vAllowedProtocols");
        vProtocolAtts = (String[]) conf.get("vProtocolAtts");
        vRemoveBlanks = (String[]) conf.get("vRemoveBlanks");
        vAllowedEntities = (String[]) conf.get("vAllowedEntities");
        stripComment = conf.containsKey("stripComment") ? (Boolean) conf.get("stripComment") : true;
        encodeQuotes = conf.containsKey("encodeQuotes") ? (Boolean) conf.get("encodeQuotes") : true;
        alwaysMakeTags = conf.containsKey("alwaysMakeTags") ? (Boolean) conf.get("alwaysMakeTags") : true;
    }

    private void reset() {
        vTagCounts.clear();
    }

    private void debug(final String msg) {
        if (vDebug) {
            Logger.getAnonymousLogger().info(msg);
        }
    }

    /**
     * 我的一些PHP库函数版本
     *
     * @param decimal
     * @return
     */
    public static String chr(final int decimal) {
        return String.valueOf((char) decimal);
    }

    /**
     * html 的一些特殊字符进行替换，例如 > 就替换成 &gt;
     *
     * @param s
     * @return
     */
    public static String htmlSpecialChars(final String s) {
        String result = s;
        result = regexReplace(P_AMP, "&amp;", result);
        result = regexReplace(P_QUOTE, "&quot;", result);
        result = regexReplace(P_LEFT_ARROW, "&lt;", result);
        result = regexReplace(P_RIGHT_ARROW, "&gt;", result);
        return result;
    }

    private static String regexReplace(final Pattern regex_pattern, final String replacement, final String s) {
        Matcher m = regex_pattern.matcher(s);
        return m.replaceAll(replacement);
    }

    public String filter(final String input) {
        reset();
        String s = input;

        debug("************************************************");
        debug("              INPUT: " + input);

        s = escapeComments(s);
        debug("     escapeComments: " + s);

        s = balanceHTML(s);
        debug("        balanceHTML: " + s);

        s = checkTags(s);
        debug("          checkTags: " + s);

        s = processRemoveBlanks(s);
        debug("processRemoveBlanks: " + s);

        s = validateEntities(s);
        debug("    validateEntites: " + s);

        debug("************************************************

");
        return s;
    }

    public boolean isAlwaysMakeTags() {
        return alwaysMakeTags;
    }

    public boolean isStripComments() {
        return stripComment;
    }

    private String escapeComments(final String s) {
        final Matcher m = P_COMMENTS.matcher(s);
        final StringBuffer buf = new StringBuffer();
        if (m.find()) {
            //(.*?)
            final String match = m.group(1);
            m.appendReplacement(buf, Matcher.quoteReplacement("<!--" + htmlSpecialChars(match) + "-->"));
        }
        m.appendTail(buf);

        return buf.toString();
    }

    private String balanceHTML(String s) {
        if (alwaysMakeTags) {
            //
            // try and form html
            //
            s = regexReplace(P_END_ARROW, "", s);
            s = regexReplace(P_BODY_TO_END, "<$1>", s);
            s = regexReplace(P_XML_CONTENT, "$1<$2", s);

        } else {
            //
            // escape stray brackets
            //
            s = regexReplace(P_STRAY_LEFT_ARROW, "&lt;$1", s);
            s = regexReplace(P_STRAY_RIGHT_ARROW, "$1$2&gt;<", s);

            //
            // the last regexp causes '<>' entities to appear
            // (we need to do a lookahead assertion so that the last bracket can
            // be used in the next pass of the regexp)
            //
            s = regexReplace(P_BOTH_ARROWS, "", s);
        }

        return s;
    }

    private String checkTags(String s) {
        Matcher m = P_TAGS.matcher(s);

        final StringBuffer buf = new StringBuffer();
        while (m.find()) {
            String replaceStr = m.group(1);
            replaceStr = processTag(replaceStr);
            m.appendReplacement(buf, Matcher.quoteReplacement(replaceStr));
        }
        m.appendTail(buf);

        s = buf.toString();

        // these get tallied in processTag
        // (remember to reset before subsequent calls to filter method)
        for (String key : vTagCounts.keySet()) {
            for (int ii = 0; ii < vTagCounts.get(key); ii++) {
                s += "</" + key + ">";
            }
        }

        return s;
    }

    private String processRemoveBlanks(final String s) {
        String result = s;
        for (String tag : vRemoveBlanks) {
            if (!P_REMOVE_PAIR_BLANKS.containsKey(tag)) {
                P_REMOVE_PAIR_BLANKS.putIfAbsent(tag, Pattern.compile("<" + tag + "(\s[^>]*)?></" + tag + ">"));
            }
            result = regexReplace(P_REMOVE_PAIR_BLANKS.get(tag), "", result);
            if (!P_REMOVE_SELF_BLANKS.containsKey(tag)) {
                P_REMOVE_SELF_BLANKS.putIfAbsent(tag, Pattern.compile("<" + tag + "(\s[^>]*)?/>"));
            }
            result = regexReplace(P_REMOVE_SELF_BLANKS.get(tag), "", result);
        }

        return result;
    }

    private String processTag(final String s) {
        // ending tags
        Matcher m = P_END_TAG.matcher(s);
        if (m.find()) {
            final String name = m.group(1).toLowerCase();
            if (allowed(name)) {
                if (!inArray(name, vSelfClosingTags)) {
                    if (vTagCounts.containsKey(name)) {
                        vTagCounts.put(name, vTagCounts.get(name) - 1);
                        return "</" + name + ">";
                    }
                }
            }
        }

        // starting tags
        m = P_START_TAG.matcher(s);
        if (m.find()) {
            final String name = m.group(1).toLowerCase();
            final String body = m.group(2);
            String ending = m.group(3);

            //debug( "in a starting tag, name='" + name + "'; body='" + body + "'; ending='" + ending + "'" );
            if (allowed(name)) {
                String params = "";

                final Matcher m2 = P_QUOTED_ATTRIBUTES.matcher(body);
                final Matcher m3 = P_UNQUOTED_ATTRIBUTES.matcher(body);
                final List<String> paramNames = new ArrayList<String>();
                final List<String> paramValues = new ArrayList<String>();
                while (m2.find()) {
                    //([a-z0-9]+)
                    paramNames.add(m2.group(1));
                    //(.*?)
                    paramValues.add(m2.group(3));
                }
                while (m3.find()) {
                    //([a-z0-9]+)
                    paramNames.add(m3.group(1));
                    //([^"\s']+)
                    paramValues.add(m3.group(3));
                }

                String paramName, paramValue;
                for (int ii = 0; ii < paramNames.size(); ii++) {
                    paramName = paramNames.get(ii).toLowerCase();
                    paramValue = paramValues.get(ii);

                    if (allowedAttribute(name, paramName)) {
                        if (inArray(paramName, vProtocolAtts)) {
                            paramValue = processParamProtocol(paramValue);
                        }
                        params += " " + paramName + "="" + paramValue + """;
                    }
                }

                if (inArray(name, vSelfClosingTags)) {
                    ending = " /";
                }

                if (inArray(name, vNeedClosingTags)) {
                    ending = "";
                }

                if (ending == null || ending.length() < 1) {
                    if (vTagCounts.containsKey(name)) {
                        vTagCounts.put(name, vTagCounts.get(name) + 1);
                    } else {
                        vTagCounts.put(name, 1);
                    }
                } else {
                    ending = " /";
                }
                return "<" + name + params + ending + ">";
            } else {
                return "";
            }
        }

        // comments
        m = P_COMMENT.matcher(s);
        if (!stripComment && m.find()) {
            return "<" + m.group() + ">";
        }

        return "";
    }

    private String processParamProtocol(String s) {
        s = decodeEntities(s);
        final Matcher m = P_PROTOCOL.matcher(s);
        if (m.find()) {
            final String protocol = m.group(1);
            if (!inArray(protocol, vAllowedProtocols)) {
                // bad protocol, turn into local anchor link instead
                s = "#" + s.substring(protocol.length() + 1, s.length());
                if (s.startsWith("#//")) {
                    s = "#" + s.substring(3, s.length());
                }
            }
        }

        return s;
    }

    private String decodeEntities(String s) {
        StringBuffer buf = new StringBuffer();

        Matcher m = P_ENTITY.matcher(s);
        while (m.find()) {
            final String match = m.group(1);
            final int decimal = Integer.decode(match).intValue();
            m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
        }
        m.appendTail(buf);
        s = buf.toString();

        buf = new StringBuffer();
        m = P_ENTITY_UNICODE.matcher(s);
        while (m.find()) {
            final String match = m.group(1);
            final int decimal = Integer.valueOf(match, 16).intValue();
            m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
        }
        m.appendTail(buf);
        s = buf.toString();

        buf = new StringBuffer();
        m = P_ENCODE.matcher(s);
        while (m.find()) {
            final String match = m.group(1);
            final int decimal = Integer.valueOf(match, 16).intValue();
            m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
        }
        m.appendTail(buf);
        s = buf.toString();

        s = validateEntities(s);
        return s;
    }

    private String validateEntities(final String s) {
        StringBuffer buf = new StringBuffer();

        // validate entities throughout the string
        Matcher m = P_VALID_ENTITIES.matcher(s);
        while (m.find()) {
            // ([^&;]*)
            final String one = m.group(1);
            // (?=(;|&|$))
            final String two = m.group(2);
            m.appendReplacement(buf, Matcher.quoteReplacement(checkEntity(one, two)));
        }
        m.appendTail(buf);

        return encodeQuotes(buf.toString());
    }

    private String encodeQuotes(final String s) {
        if (encodeQuotes) {
            StringBuffer buf = new StringBuffer();
            Matcher m = P_VALID_QUOTES.matcher(s);
            while (m.find()) {
                // (>|^)
                final String one = m.group(1);
                // ([^<]+?)
                final String two = m.group(2);
                // (<|$)
                final String three = m.group(3);
                m.appendReplacement(buf, Matcher.quoteReplacement(one + regexReplace(P_QUOTE, "&quot;", two) + three));
            }
            m.appendTail(buf);
            return buf.toString();
        } else {
            return s;
        }
    }

    private String checkEntity(final String preamble, final String term) {

        return ";".equals(term) && isValidEntity(preamble)
                ? '&' + preamble
                : "&amp;" + preamble;
    }

    private boolean isValidEntity(final String entity) {
        return inArray(entity, vAllowedEntities);
    }

    private static boolean inArray(final String s, final String[] array) {
        for (String item : array) {
            if (item != null && item.equals(s)) {
                return true;
            }
        }
        return false;
    }

    private boolean allowed(final String name) {
        return (vAllowed.isEmpty() || vAllowed.containsKey(name)) && !inArray(name, vDisallowed);
    }

    private boolean allowedAttribute(final String name, final String paramName) {
        return allowed(name) && (vAllowed.isEmpty() || vAllowed.get(name).contains(paramName));
    }
}

2、创建一个 xss 过滤类，继承HttpServletRequestWrapper，这个类是一个包装类

package io.xiongdi.common.xss;

import com.google.common.net.HttpHeaders;
import org.apache.commons.io.IOUtils;
import org.apache.commons.lang.StringUtils;
import org.springframework.http.MediaType;
import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.LinkedHashMap;
import java.util.Map;

/**
 * xss 过滤处理
 * 实现了HttpServletRequestWrapper的类，就可以成为HttpRequestWrapper的装饰类
 * @author  wujiaxing
 * @date 2019-07-10
 */
public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper {

    /**
     * 没有包装过的 HttpServletRequest ，（特殊场景，需要自己过滤）
     */
    private HttpServletRequest orgRequest;
    /**
     *  html 过滤
     */
    private final static HTMLFilter htmlFilter = new HTMLFilter();

    @Override
    public Map<String, String[]> getParameterMap() {
        Map<String, String[]> parameterMap = super.getParameterMap();
        if (parameterMap.size() > 0) {
            Map<String, String[]> map = new LinkedHashMap<>();
            for (String k : parameterMap.keySet()) {
                String[] v = parameterMap.get("s");
                for (int i = 0; i < v.length; i++) {
                    v[i] = xssEncode(v[i]);
                }
                map.put(xssEncode(k), v);
            }
            return map;
        }
        return parameterMap;
    }

    @Override
    public String getHeader(String name) {
        String header = super.getHeader(xssEncode(name));
        if (StringUtils.isNotBlank(header)) {
            return xssEncode(header);
        }
        return header;
    }

    @Override
    public ServletInputStream getInputStream() throws IOException {
        // 请求头非json类型，直接返回，Content-Type ！= application/json
        if (!MediaType.APPLICATION_JSON_VALUE.equalsIgnoreCase(super.getHeader(HttpHeaders.CONTENT_TYPE))) {
            return super.getInputStream();
        }
        // 请求流为空，直接返回
        String io = IOUtils.toString(super.getInputStream(), "UTF-8");
        if (StringUtils.isBlank(io)) {
            return super.getInputStream();
        }
        // 执行 xss 过滤
        io = xssEncode(io);
        // 将过滤结果封装成流
        final ByteArrayInputStream bio = new ByteArrayInputStream(io.getBytes("UTF-8"));
        return new ServletInputStream() {
            @Override
            public boolean isFinished() {
                return true;
            }

            @Override
            public boolean isReady() {
                return true;
            }

            @Override
            public void setReadListener(ReadListener listener) {

            }

            @Override
            public int read() throws IOException {
                return bio.read();
            }
        };
    }

    private String xssEncode(String input) {
        return htmlFilter.filter(input);
    }

    @Override
    public String getParameter(String name) {
        String value = super.getParameter(xssEncode(name));
        if (StringUtils.isNotBlank(value)) {
            return xssEncode(value);
        }
        return value;
    }

    @Override
    public String[] getParameterValues(String name) {
        String[] values = super.getParameterValues(xssEncode(name));
        if (values == null || values.length == 0) {
            return null;
        }
        for (int i = 0; i < values.length; i++) {
            values[i] = xssEncode(values[i]);
        }
        return values;
    }

    /**
     * Constructs a request object wrapping the given request.
     *
     * @param request The request to wrap
     * @throws IllegalArgumentException if the request is null
     */
    public XssHttpServletRequestWrapper(HttpServletRequest request) {
        super(request);
        this.orgRequest = request;
    }

    /**
     * 获取最原始的 request
     * @return
     */
    public HttpServletRequest getOrgRequest() {
        return orgRequest;
    }

    /**
     * 获取最原始的 request
     * @param request
     * @return
     */
    public static HttpServletRequest getOrgRequest(HttpServletRequest request) {
        if (request instanceof XssHttpServletRequestWrapper) {
            return ((XssHttpServletRequestWrapper)request).getOrgRequest();
        }
        return request;
    }
}

3、正式创建过滤器，使用我们定义的 HttpServletRequestWrapper的子类 包装类去替换掉它原来的 HttpServletRequest

package io.xiongdi.common.xss;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

/**
 * xss 过滤
 *
 * @author wujiaxing
 * @date 2019-07-10
 */
public class XssFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        XssHttpServletRequestWrapper xssRequest = new XssHttpServletRequestWrapper((HttpServletRequest) request); 
        chain.doFilter(xssRequest, response); // 这里使用的是HttpServletRequest的子类

} @Override public void destroy() { } }

4、将过滤器配置给 spring boot

package io.xiongdi.config;

import io.xiongdi.common.xss.XssFilter;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.servlet.DispatcherType;

/**
 * @author wujiaxing
 * <p>
 *     过滤器配置
 * </p>
 */
@Configuration
public class FilterConfig {

    @Bean
    public FilterRegistrationBean xssFilterRegistration() {
        FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
        filterRegistrationBean.setFilter(new XssFilter());
        filterRegistrationBean.addUrlPatterns("/*");
        filterRegistrationBean.setDispatcherTypes(DispatcherType.REQUEST);
        filterRegistrationBean.setName("xssFilter");
        return filterRegistrationBean;
    }
}

注意路径配置成 /*