我有index.jsp，我想搜索视频，但每当我搜索时，它都会给我带来不同的错误，并且我无法获得结果，就像它应该将用户带到搜索文本所在的页面一样。
Search.java
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Servlet implementation class Search
*/
@WebServlet("/Search")
public class Search extends HttpServlet {
private static final long serialVersionUID = 1L;
/**
* @see HttpServlet#HttpServlet()
*/
public Search() {
super();
// TODO Auto-generated constructor stub
}
/**
* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
*/
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
}
/**
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/HTML");
PrintWriter out = response.getWriter();
String search=request.getParameter("search");
try
{
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe", "MEHAK", "1234");
PreparedStatement ps=conn.prepareStatement("select * from UPLOADED_FILES where filename=?");
ResultSet rs = ps.executeQuery();
if(rs.next()){
response.sendRedirect("Anime.jsp");
}
else{
out.print("Sorry! Could not recognise the search!");
}
}
catch(Exception e)
{
out.println(e.getMessage());
}
}
}
index.jsp
<body class="page1">
<%
String u="", Login="Log In";
try{
u=session.getAttribute("username").toString();
if(u==null){
Login="Log In";
}
else{
Login="Log Out";
}
}
catch(Exception e){
}
%>
<div class="extra">
<!--==============================banner================================-->
<header>
<div class="main">
<div class="bg-1">
<div class="box">
<h1><a href="index.jsp">Verve</a></h1>
<div class="container-1">
<form action="Search" method="post">
<span class="icon"><i class="fa fa-search"></i></span>
<input type="search" id="search" name="search" placeholder="Search"/>
</form>
</div>
</div>
</div>
这只是实现搜索框的index.jsp的一部分。
最佳答案
如果您在 PreparedStatement 中使用 ? 定义占位符，则必须设置它:
PreparedStatement ps=conn.prepareStatement("select * from UPLOADED_FILES where filename=?");
将其更改为:
PreparedStatement ps=conn.prepareStatement("select * from UPLOADED_FILES where filename=?");
ps.setString(1,"myFile.txt");
关于java - 搜索框 servlet，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/32330797/