Servlet 如何获取表单提交的数据呢？
获取表单数据是每一个Web应用都必须面对的事情，那么Servlet后台程序如何获取表单提交的数据呢？
下文将一一道来，如下所示:
下文将一一道来，如下所示:
实现思路:
1. getParameter():request.getParameter(控件name)获取指定表单控件的值
如:
<input type="text" name="uuu" />
String t = request.getParameter("uuu");
2.getParameterValues():
当一个控件出现超过一次以上，
我们可以使用此方法，获取控件对应的多个值，如:checkbox控件
3.getParameterNames():
此方法可以获取表单中所有参数列表信息
例: Servlet Post请求示例分享
一、新建PostTest.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Java265.com -Post获取数据测试</title>
</head>
<body>
<body>
<form action="/servlet01/helloWorld" method="POST" target="_Self">
<input type="checkbox" name="program" checked="checked" value="java265" /> Java265
<input type="checkbox" name="program" value="donet" /> donet
<input type="checkbox" name="program" value ="python" checked="checked" /> Python
<br />
<input type="text" name="urlInfo" value="java265.com" /> <br />
<input type="submit" value="submit" />
</form>
</body>
</html>
二、修改ServletHelloWorld.java代码
package servlet01;
import java.io.IOException;
import java.io.PrintWriter;
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("/helloWorld")
public class ServletHelloWorld extends HttpServlet {
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setContentType("text/html");
String program = "";
if (req.getParameter("program") != null) {
String[] strlist = req.getParameterValues("program");
for (int t = 0; t < strList.length; t++) {
program = program + "|" + strList[t];
}
}
String urlInfo = "";
if (req.getParameter("urlInfo") != null) {
urlInfo = new String(req.getParameter("urlInfo").getBytes("ISO-8859-1"), "UTF-8");
}
// 输出获取的值
PrintWriter o = resp.getWriter();
o.println("<h4>Java265.com -Post TestCase</h4>");
o.println("<h5>GetParameter-program:" + program + "</h5>");
o.println("<h5>GetParameter-urlInfo:" + urlInfo + "</h5>");
}
/**
*
*/
private static final long serialVersionUID = 888;
private String msg;
@Override
public void init() throws ServletException {
// TODO Auto-generated method stub
super.init();
msg = "java265.com is Java WebSite.";
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
// TODO Auto-generated method stub
resp.setContentType("text/html");
String urlInfo = "";
if (req.getParameter("urlInfo") != null) {
urlInfo = new String(req.getParameter("urlInfo").getBytes("ISO-8859-1"), "UTF-8");
}
// 输出获取的值
PrintWriter o = resp.getWriter();
o.println("<h4>" + msg + "</h4>");
o.println("<h5>GetParameter:" + urlInfo + "</h5>");
}
}
三、在Tomcat中进行测试
版权声明
本文仅代表作者观点，不代表本站立场。
本文系作者授权发表，未经许可，不得转载。
