XSSRequestWrapper.java 

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

import org.apache.commons.lang.StringEscapeUtils;

public class XSSRequestWrapper extends HttpServletRequestWrapper {

    public XSSRequestWrapper(HttpServletRequest request) {
        super(request);
    }

    /**
     * 處理引數值
    */
    @Override
    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] = dealString(values[i]);
        }
        return encodedValues;
    }
    @Override
    public String getParameter(String parameter) {
        String value = super.getParameter(parameter);
        return dealString(value);
    }

    @Override
    public String getHeader(String name) {
        String value = super.getHeader(name);
        return dealString(value);
    }

    private String dealString(String value) {
        if (value != null) {
            // 採用spring的StringEscapeUtils工具類 實現
            StringEscapeUtils.escapeHtml(value);
            StringEscapeUtils.escapeJavaScript(value);
            StringEscapeUtils.escapeSql(value);
        }
        return value;
    }

}
 

XSSFilter.java

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;

/**
 * 防止xss攻擊 過濾器（順便過濾了 sql攻擊）
 */
public class XSSFilter implements Filter {

    @Override
    public void init(FilterConfig arg0) throws ServletException {

    }

    @Override
    public void destroy() {

    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
            throws IOException, ServletException {

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

    }

}