首先是一个mainpage.jsp页面有个form填写数据后提交，action就是servlet。点提交后可以成功插入数据库，但是不能返回，试过用了response.sendRedirect("mainpage.jsp");和getRequestDispatcher也不行，想请教一下高手，我是初学者，帮我看一下代码，请见谅！
- Java code
public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException { try { PrintWriter out = response.getWriter(); response.setContentType("text/html;charset=gb2312"); out.println("<HTML>"); out.println("<BODY>"); out.println("<a href='mainpage.jsp'>返回</a>"); out.println("</BODY>"); out.println("</HTML>"); DBBean dbbean = new DBBean(); request.setCharacterEncoding("utf-8"); String insert = "insert into news(num,theme,author,date) values('" + request.getParameter("num") + "','" + request.getParameter("theme") + "','" + request.getParameter("author") + "','" + request.getParameter("date") + "')"; if (null != request.getParameter("num")&& !"".equals(request.getParameter("num"))) { dbbean.update(insert); } } catch (Exception ex) { ex.printStackTrace(); } finally { DBBean dbbean = new DBBean(); dbbean.close(); } } public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { doPost(request, response); }}
对了，点击返回后是servlet/mainpage.jsp。 错误404。还有就是 返回 两个字 是乱码。 高手们帮帮我啦。
这是 mainpage的form代码
- Java code
<form onSubmit="return validate()" method="post" name="biaoge" action="servlet/MyServlet" ><br>编号：<input type="text" name="num" ><br><br>主题：<input type="text" name="theme" ><br><br>作者：<input type="text" name="author" ><br><br>日期：<input type="text" name="date" ><br><br><input type="submit" value=提交></form>
------解决方案--------------------
response.sendRedirect("/mainpage.jsp");
少了斜杠。