Servlet请求参数编码处理（POST & GET）

小巧，但在中文语境下，还是要注意的。

以下是关键语句，注意转码的先后顺序，这源于GET是HTTP服务器处理，而POST是WEB容器处理：

String name = request.getParameter("nameGet");
name = new String(name.getBytes("ISO-8859-1"), "gb2312");

================================

request.setCharacterEncoding("gb2312");
String name = request.getParameter("namePost");

package cc.openhome;

import java.io.IOException;
import java.io.BufferedReader;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/encoding")
public class EncodingServlet extends HttpServlet{
protected void doGet(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
String name = request.getParameter("nameGet");
name = new String(name.getBytes("ISO-8859-1"), "gb2312");
System.out.println("GET: " + name);
}

protected void doPost(HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("gb2312");
String name = request.getParameter("namePost");
System.out.println("POST: " + name);
String body = readBody(request);
System.out.println("Body: " + body);
}
private String readBody(HttpServletRequest request)
throws IOException{
BufferedReader reader = request.getReader();
String input = null;
String requestBody = "";
while((input = reader.readLine()) != null) {
requestBody += input;
}
return requestBody;
}
}