步骤1:获取中文的参数
步骤2:返回中文的响应
示例 1 : 获取中文的参数
为了成功获取中文参数,需要做如下操作
1. login.html中加上
<meta http-equiv= "Content-Type" content= "text/html; charset=UTF-8" >
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这句话的目的是告诉浏览器,等下发消息给服务器的时候,使用UTF-8编码
2. login.html
form的method修改为post
3. 在servlet进行解码和编码
byte [] bytes= name.getBytes( "ISO-8859-1" );
name = new String(bytes, "UTF-8" );
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先根据ISO-8859-1解码,然后用UTF-8编码
这样就可以得到正确的中文参数了
这样需要对每一个提交的数据都进行编码和解码处理,如果觉得麻烦,也可以使用一句话代替:
request.setCharacterEncoding( "UTF-8" );
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并且把这句话放在request.getParameter()之前
以上是使用UTF-8的方式获取中文呢。 也可以使用GBK。把所有的UTF-8替换为GBK即可。 GB2312同理。
<!DOCTYPE html>
< meta http-equiv = "Content-Type" content = "text/html; charset=UTF-8" >
< form action = "login" method = "post" >
账号 : < input type = "text" name = "name" > < br > 密码: < input
type = "password" name = "password" > < br > < input
type = "submit" value = "登录" >
</ form >
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import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class LoginServlet extends HttpServlet {
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
String name = request.getParameter("name");
// byte[] bytes = name.getBytes("ISO-8859-1");
// name = new String(bytes, "UTF-8");
String password = request.getParameter("password");
System.out.println("name:" + name);
}
}
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示例 2 : 返回中文的响应
在Servlet中,加上
response.setContentType( "text/html; charset=UTF-8" );
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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 LoginServlet extends HttpServlet {
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String name = request.getParameter( "name" );
String password = request.getParameter( "password" );
String html = null ;
if ( "admin" .equals(name) && "123" .equals(password))
html = "<div style='color:green'>登录成功</div>" ;
else
html = "<div style='color:red'>登录失败</div>" ;
response.setContentType( "text/html; charset=UTF-8" );
PrintWriter pw = response.getWriter();
pw.println(html);
}
}
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