📄 requestparamexample.java
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import java.io.*;
import java.text.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class RequestParamExample extends HttpServlet {
ResourceBundle rb = ResourceBundle.getBundle("LocalStrings");
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException
{
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<html>");
out.println("<body>");
out.println("<head>");
String title = rb.getString("requestparams.title");
out.println("<title>" + title + "</title>");
out.println("</head>");
out.println("<body bgcolor=\"white\">");
out.println("<h3>" + title + "</h3>");
// 获取表单传送过来的参数值
String firstName = request.getParameter("firstname");
String lastName = request.getParameter("lastname");
out.println(rb.getString("requestparams.params-in-req") + "<br>");
// 如果非空，则输出参数值
if (firstName != null || lastName != null) {
out.println(rb.getString("requestparams.firstname"));
out.println(" = " + firstName + "<br>");
out.println(rb.getString("requestparams.lastname"));
out.println(" = " + lastName);
} else { // 否则，显示信息
out.println(rb.getString("requestparams.no-params"));
}
// 输出表单的HTML代码
out.println("<P>");
out.print("<form action=\"");
out.print("RequestParamExample\" ");
out.println("method=POST>");
out.println(rb.getString("requestparams.firstname"));
out.println("<input type=text size=20 name=firstname>");
out.println("<br>");
out.println(rb.getString("requestparams.lastname"));
out.println("<input type=text size=20 name=lastname>");
out.println("<br>");
out.println("<input type=submit>");
out.println("</form>"); out.println("</body>");
out.println("</html>");
}
public void doPost(HttpServletRequest request,
HttpServletResponse response) throws IOException, ServletException
{ doGet(request, response); }
}
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