SpringBoot过滤器过滤get及post请求中的XSS和SQL注入

1.创建XssAndSqlHttpServletRequestWrapper包装器，这是实现XSS过滤的关键，在其内重写了getParameter，getParameterValues，getHeader等方法，对http请求内的参数进行了过滤。

package com.wb.common;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import java.util.Vector;
import java.util.regex.Pattern;

import javax.servlet.ReadListener;
import javax.servlet.ServletInputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;

import org.springframework.util.StreamUtils;

import com.sgcc.uap.utils.stream.StreamUtil;

public class XssAndSqlHttpServletRequestWrapper extends HttpServletRequestWrapper {

    HttpServletRequest orgRequest = null;
    private Map parameterMap;
    private final byte[] body; //用于保存读取body中数据

    public XssAndSqlHttpServletRequestWrapper(HttpServletRequest request) throws IOException{
        super(request);
        orgRequest = request;
        parameterMap = request.getParameterMap();
        body = StreamUtils.copyToByteArray(request.getInputStream());
    }

    // 重写几个HttpServletRequestWrapper中的方法
    /**
     * 获取所有参数名
     *
     * @return 返回所有参数名
     */
    @Override
    public Enumeration getParameterNames() {
        Vector vector = new Vector(parameterMap.keySet());
        return vector.elements();
    }

    /**
     * 覆盖getParameter方法，将参数名和参数值都做xss & sql过滤。

     * 如果需要获得原始的值，则通过super.getParameterValues(name)来获取

     * getParameterNames,getParameterValues和getParameterMap也可能需要覆盖
     */
    @Override
    public String getParameter(String name) {
        String[] results = parameterMap.get(name);
        if (results == null || results.length <= 0)
            return null;
        else {
            String value = results[0];
            if (value != null) {
                value = xssEncode(value);
            }
            return value;
        }
    }

    /**
     * 获取指定参数名的所有值的数组，如：checkbox的所有数据 接收数组变量 ，如checkobx类型
     */
    @Override
    public String[] getParameterValues(String name) {
        String[] results = parameterMap.get(name);
        if (results == null || results.length <= 0)
            return null;
        else {
            int length = results.length;
            for (int i = 0; i < length; i++) {
                results[i] = xssEncode(results[i]);
            }
            return results;
        }
    }

    /**
     * 覆盖getHeader方法，将参数名和参数值都做xss & sql过滤。

     * 如果需要获得原始的值，则通过super.getHeaders(name)来获取

     * getHeaderNames 也可能需要覆盖
     */
    @Override
    public String getHeader(String name) {

        String value = super.getHeader(xssEncode(name));
        if (value != null) {
            value = xssEncode(value);
        }
        return value;
    }

    /**
     * 将容易引起xss & sql漏洞的半角字符直接替换成全角字符
     * 
     * @param s
     * @return
     */
    private static String xssEncode(String s) {
        if (s == null || s.isEmpty()) {
            return s;
        } else {
            s = stripXSSAndSql(s);
        }
        StringBuilder sb = new StringBuilder(s.length() + 16);
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            switch (c) {
            case '>':
                sb.append("＞");// 转义大于号
                break;
            case '<':
                sb.append("＜");// 转义小于号
                break;
            // case '\'':
            // sb.append("＇");// 转义单引号
            // break;
            // case '\"':
            // sb.append("＂");// 转义双引号
            // break;
            case '&':
                sb.append("＆");// 转义&
                break;
            case '#':
                sb.append("＃");// 转义#
                break;
            default:
                sb.append(c);
                break;
            }
        }
        return sb.toString();
    }

    /**
     * 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 XssAndSqlHttpServletRequestWrapper) {
            return ((XssAndSqlHttpServletRequestWrapper) req).getOrgRequest();
        }

        return req;
    }

    /**
     * 
     * 防止xss跨脚本攻击（替换，根据实际情况调整）
     */

    public static String stripXSSAndSql(String value) {
        if (value != null) {
            // NOTE: It's highly recommended to use the ESAPI library and
            // uncomment the following line to
            // avoid encoded attacks.
            // value = ESAPI.encoder().canonicalize(value);
            // Avoid null characters
            /** value = value.replaceAll("", ""); ***/
            // Avoid anything between script tags
            Pattern scriptPattern = Pattern.compile(
                    "<[\r\n| | ]*script[\r\n| | ]*>(.*?)", Pattern.CASE_INSENSITIVE);
            value = scriptPattern.matcher(value).replaceAll("");
            // Avoid anything in a
            // src="http://www.yihaomen.com/article/java/..." type of
            // e-xpression
            scriptPattern = Pattern.compile("src[\r\n| | ]*=[\r\n| | ]*[\\\"|\\\'](.*?)[\\\"|\\\']",
                    Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            value = scriptPattern.matcher(value).replaceAll("");
            // Remove any lonesome  tag
            scriptPattern = Pattern.compile("", Pattern.CASE_INSENSITIVE);
            value = scriptPattern.matcher(value).replaceAll("");
            // Remove any lonesome  tag
            scriptPattern = Pattern.compile("", Pattern.CASE_INSENSITIVE);
            flag = scriptPattern.matcher(value).find();
            if (flag) {
                return flag;
            }
            // Remove any lonesome