防止sql注入

<filter>

<filter-name>XssSqlFilter</filter-name>

<filter-class>com.thundersoft.metadata.utils.filter.XssFilter</filter-class>

</filter>

<filter-mapping>

<filter-name>XssSqlFilter</filter-name>

<url-pattern>/*</url-pattern>

<dispatcher>REQUEST</dispatcher>

</filter-mapping>

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package com.thundersoft.metadata.utils.filter;

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;

public class XssFilter implements Filter {

FilterConfig filterConfig = null;

public void init(FilterConfig filterConfig) throws ServletException {

this.filterConfig = filterConfig;

}

public void destroy() {

this.filterConfig = null;

}

public void doFilter(ServletRequest request, ServletResponse response,

FilterChain chain) throws IOException, ServletException {

chain.doFilter(new XssHttpServletRequestWrapper(

(HttpServletRequest) request), response);

}

}

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package com.thundersoft.metadata.utils.filter;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletRequestWrapper;

public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper {

public XssHttpServletRequestWrapper(HttpServletRequest servletRequest) {

super(servletRequest);

}

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] = cleanXSS(values[i]);

}

return encodedValues;

}

public String getParameter(String parameter) {

String value = super.getParameter(parameter);

if (value == null) {

return null;

}

return cleanXSS(value);

}

public String getHeader(String name) {

String value = super.getHeader(name);

if (value == null)

return null;

return cleanXSS(value);

}

private String cleanXSS(String value) {

//You'll need to remove the spaces from the html entities below

value = value.replaceAll("<", "& lt;").replaceAll(">", "& gt;");

value = value.replaceAll("\\(", "& #40;").replaceAll("\\)", "& #41;");

value = value.replaceAll("'", "& #39;");

value = value.replaceAll("eval\\((.*)\\)", "");

value = value.replaceAll("[\\\"\\\'][\\s]*javascript:(.*)[\\\"\\\']", "\"\"");

value = value.replaceAll("script", "");

return value;

}

}