使用servlet获取所有请求参数
使用servlet获取HTTP请求中的所有请求参数。
源代码
PrtReqParas.java
[java]
import java.io.PrintWriter;
import java.io.IOException;
import java.util.Enumeration;
import javax.servlet.annotation.WebServlet;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@WebServlet(name = “printParas”, urlPatterns = {“/printParas/“}, loadOnStartup = 1)
public class PrtReqParas extends HttpServlet {
@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
printParas(request, response);
}
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
printParas(request, response);
}
public void printParas(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
response.setContentType(“text/html”);
PrintWriter out = response.getWriter();
out.println(““);
out.println(“
out.println(““);
out.println(“
| Parameters | Value |
|---|---|
| “ + para + “ | “);“ + request.getParameter(para) + “ |
out.println(““);
}
}
[/java]
输出
使用URL http://127.0.0.1/hello/printParas/?a=1&b=2&c=3&d=4 访问样例程序，输出如下：
Parameters
Value
d
4
b
2
c
3
a
1