代码实现
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'search.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css" target="_blank" rel="external nofollow" >
-->
<script type="text/javascript" src="jquery-3.2.1.js"></script>
</head>
<script type="text/javascript">
$(function() {
$("#word").keyup(function() {
/* 获得文本框的值 */
var word = $("#word").val();
/* 异步发送请求 */
if (word != "") {
$.post("/J2EE/searchservlet", {
"word" : word
}, function(data) {
$("#d1").show().html(data);
});
} else {
$("#d1").hide();
}
});
});
</script>
<body>
<center>
<h1>百度一下</h1>
<input type="text" name="word" id="word"
style="width: 400px;height: 25px" /><input type="button"
value="百度一下" /> <br><span id="d1"></span>
</center>
</body>
</html>
package search;
import java.io.IOException;
import java.io.PrintWriter;
import java.sql.SQLException;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class searchservlet extends HttpServlet {
/**
* 仿百度搜索页面
*/
private static final long serialVersionUID = 1L;
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");//解决post提交中文乱码
response.setContentType("UTF-8");//解决页面输出中文乱码
String word=request.getParameter("word");
wordservice ws=new wordservice();
try {
List<Words> words=ws.search(word);
request.setAttribute("words", words);
request.getRequestDispatcher("/html/info.jsp").forward(request, response);//牢记转发时不要带工程名
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet( request, response);
}
}
package search;
public class Words {
private int id;
private String word;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getWord() {
return word;
}
public void setWord(String word) {
this.word = word;
}
}
package search;
import java.sql.SQLException;
import java.util.List;
public class wordservice {
public List<Words> search(String word) throws SQLException {
// TODO Auto-generated method stub
worddao wd=new worddao();
return wd.search(word);
}
}
package search;
import java.sql.SQLException;
import java.util.List;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import utils.c3p0tool;
public class worddao {
public List<Words> search(String word) throws SQLException {
// TODO Auto-generated method stub
QueryRunner qr=new QueryRunner(c3p0tool.getDataSource());
/*String sql1="insert into words values(null,?)";
qr.update(sql1,word);*/
String sql="select * from words where word like ? limit 2";/*只查两个*/
List<Words> l = qr.query(sql,new BeanListHandler<Words>(Words.class),word+"%");
for(Words i:l){
String sql1="insert into words values(null,?)";
qr.update(sql1,i.getWord());
}
return l;
}
}
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<table>
<c:forEach items="${words}" var="w">
<tr>
<td>${w.word}</td>
</tr>
</c:forEach>
</table>
![Java小案例——随机数猜测随机数猜测[图]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)