javaweb doPost與doGet請求獲取參數亂碼問題

在doPost請求中我們可以使用攔截器，Filter進行攔截，將編碼改爲utf-8

package web.filter;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Map;
import java.util.Map.Entry;

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.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebFilter("/*")//攔截所有的請求路徑
public class MyEncodingFilter implements Filter{

@Override
public void init(FilterConfig filterConfig) throws ServletException {}
@Override
public void destroy() {}

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
		throws IOException, ServletException {
	HttpServletResponse mResponse=(HttpServletResponse) response;
	mResponse.setHeader("content-type", "text/html;charset=utf-8");
	//1.設置POST請求中文亂碼的問題
	HttpServletRequest hsr = (HttpServletRequest)request;
	if(hsr.getMethod().equalsIgnoreCase("post")){
		request.setCharacterEncoding("UTF-8");
	}
	chain.doFilter(request, response);
	
	
	
	
}

}

可以對request與response進行攔截，修改編碼

doGet請求出現亂碼例如下列代碼
String category=request.getParameter(“category”);
在這裏category獲取會變爲亂碼，這裏有我想到的有兩種解決方案
在獲得這個參數後，進行轉碼
byte[] buf = category.getBytes(“iso8859-1”);
category = new String(buf,“utf-8”);
即可獲得正確的數據

另一種解決方法修改Tomcat中的server.xml文件
在Connector標籤下，添加URIEncoding=“utf-8”

重新啓動Tomcat
即可正確獲得參數