這種情況應該是沒設置請求和響應的編碼(只針對post請求有效，對get請求無效，下面再說get請求的）
//設置請求的字符集編碼
request.setCharacterEncoding("UTF-8");
//設置響應的字符集編碼
response.setContentType("text/html;charset=UTF-8");
例子：
<!--index.jsp-->
<%@ page language="java" import="java.util.*,java.text.*" pageEncoding="UTF-8" errorPage="error.jsp"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%! public String getDateStr(){
SimpleDateFormat simpleDateFormat =new SimpleDateFormat("yyyy-MM-dd HH:mm:ss E");
String strDate = simpleDateFormat.format(new Date());
return strDate;
} %>
<!DOCTYPE HTML>
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
現在的日期時間:<%=getDateStr() %>
<form action="test.do" name="myform" method="post">
輸入要傳遞的信息:<input type="text" name="info"/>
<input type="submit" value="確定">
</form>
</body>
</html>
//TestServlet
package servlets;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class TestServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
@Override
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
// TODO Auto-generated method stub
//設置請求的字符集編碼
request.setCharacterEncoding("UTF-8");
System.out.println("請求到達服務端...");
//接收客戶端的請求數據;
String info=request.getParameter("info");
System.out.println("服務端收到客戶端的數據:"+info);
//設置響應的字符集編碼
response.setContentType("text/html;charset=UTF-8");
//將接收的消息,以響應的方式輸出到客戶端
PrintWriter out =response.getWriter();
out.println("info:"+info);
//釋放資源
out.flush();
out.close();
}
}
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name>web_01</display-name>
<servlet>
<servlet-name>TestServlet</servlet-name>
<servlet-class>servlets.TestServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>TestServlet</servlet-name>
<url-pattern>/test.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
對於get請求，這種方法無效，可以採用以下：
在本機上找到Tomcat的安裝目錄 conf目錄下的server.xml文件，打開
找到下面這段，加上URIEncoding="UTF-8"
