e cn.itcast.sh.demo;
import java.io.IOException;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
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 EncodFilter implements Filter{
@Override
public void destroy() {
}
@Override
public void doFilter(ServletRequest request, final ServletResponse response,
final FilterChain chain) throws IOException, ServletException {
//過濾器需要代理request中的getParameter方法
final HttpServletRequest httpServletRequest = (HttpServletRequest) request;
final HttpServletRequest proxyRequest = (HttpServletRequest)Proxy.newProxyInstance(
EncodFilter.class.getClassLoader(),
httpServletRequest.getClass().getInterfaces(),
new InvocationHandler() {
public Object invoke(Object proxy, Method method, Object[] args)
throws Throwable {
//獲取到調用的方法名
String name = method.getName();
//判斷調用的方法是否是getParameter
if( "getParameter".equals(name) ){
//進行亂碼的處理
String requestMehtod = httpServletRequest.getMethod();
String value = httpServletRequest.getParameter("name");
if( "get".equals(requestMehtod) ){
//處理get方式的亂碼
return new String(value.getBytes("iso-8859-1"),"utf-8");
}else{
//處理post方式的亂碼
httpServletRequest.setCharacterEncoding("utf-8");
return value;
}
}else{
chain.doFilter(httpServletRequest, response);
return null;
}
}
});
}
@Override
public void init(FilterConfig arg0) throws ServletException {
// TODO Auto-generated method stub
}
}
動態代理解決全局亂碼問題
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