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張誌宇 SERVELET JSP學習講義-08_SERVLET如何從上一個頁麵取得參數
首先，servlet如下編寫代碼：
package com.zzk.cn;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
public class ThreeParams extends HttpServlet{
private static final long serialVersionUID = 1L;
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html;charset=GBK");
//解決post方式提交內容的亂碼
//一定要寫在存取第一個參數之前
request.setCharacterEncoding("GBK");
//解決get方式亂碼問題：-->URIEncoding="GBK"
PrintWriter out = response.getWriter();
out.println(request.getParameter("param1"));
out.println("<br>");
out.println(request.getParameter("param2"));
out.println("<br>");
out.println(request.getParameter("param3"));
out.println("<br>");
System.out.println("in doGet");
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
System.out.println("in doPost");
doGet(request, response);
}
}
頁麵輸出：
1
2是
2
ThreeParams.htm裏post方式
<form name="form1" method="post" action="ThreeParams">
<table width="343" border="1">
<tr>
<td width="92">param1</td>
<td width="94"><input name="param1" type="text" /> </td>
</tr>
<tr>
<td>param2</td>
<td><label>
<input name="param2" type="text" />
</label></td>
</tr>
<tr>
<td>param3</td>
<td><input name="param3" type="text" /></td>
</tr>
<tr>
<td> </td>
<td><label>
<input type="submit" value="提交" />
</label></td>
</tr>
</table>
</form>
傳參成功
tomcat裏顯示：
in Dopost in Doget
然後將html改為get方式：
傳參成功
tomcat裏顯示：
in doGet
最後更新：2017-04-02 22:16:18