如何將數據庫記錄放入ArrayList中?我想在一個jsp文件中查看它。但是,ArrayList中所有對象的值與我選擇的數據庫中的最後一條記錄相同。將數據庫記錄存儲到列表中
我在我的項目中的這些代碼:
IPBean.java
public class IPBean {
private String ip;
private String userName;
private String password;
private int maxRetry;
public String getIp() {
return ip;
}
protected void setIp(String ip) {
this.ip = ip;
}
public String getUserName() {
return userName;
}
protected void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return password;
}
protected void setPassword(String password) {
this.password = password;
}
public int getMaxRetry() {
return maxRetry;
}
protected void setMaxRetry(int maxRetry) {
this.maxRetry = maxRetry;
}
}
IPBeanMapper.java
import java.sql.*;
import java.util.ArrayList;
public class IPBeanMapper {
public ArrayList<IPBean> getIPList() throws SQLException, ClassNotFoundException {
ArrayList<IPBean> ipList = new ArrayList<IPBean>();
Connection conn = null;
conn = ConnectionTools.getConnection();
String SQL = "SELECT * FROM LIST_IPM";
Statement statement = conn.createStatement();
ResultSet rs = statement.executeQuery(SQL);
IPBean ipBean = new IPBean();
while (rs.next()){
ipBean.setIp(rs.getString("IP"));
ipBean.setMaxRetry(rs.getInt("NUM_OF_RETRY"));
ipBean.setPassword(rs.getString("PASSWORD"));
ipBean.setUserName(rs.getString("USERNAME"));
ipList.add(ipBean);
}
ConnectionTools.attemptClose(rs);
ConnectionTools.attemptClose(statement);
ConnectionTools.attemptClose(conn);
System.out.print(ipList.size());
return ipList;
}
}
view.jsp的
<%@ page contentType="text/html;charset=UTF-8" language="java" import="DSIP.*" import="java.util.ArrayList" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>DSIP.Insert</title>
</head>
<body>
<jsp:useBean id="ipList" scope="application" class="IPBeanMapper"/>
<jsp:useBean id="bean" scope="application" class="IPBean"/>
<form name="form1" method="post" action="viewServlet">
<table width="" border="">
<tr bgcolor="#0099FF">
<td width="90"><div align="center">ip</div></td>
<td width="90"><div align="center">username</div></td>
<td width="90"><div align="center">password</div></td>
<td width="90"><div align="center">maxRetry</div></td>
</tr>
<%
ArrayList<IPBean> list;
list = ipList.getIPList();
for (int i = 0; i < list.size(); i++){
bean = list.get(i);
%>
<tr>
<td><input name="ip" type="text" size="15" value="<%=list.getIp()%>"></td>
<td><input name="userName" type="text" size="15" value="<%=bean.getUserName()%>"></td>
<td><input name="password" type="text" size="15" value="<%=bean.getPassword()%>"></td>
<td><input name="maxRetry" type="text" size="15" value="<%=bean.getMaxRetry()%>"></td>
</tr>
<%
}
%>
</table>
</form>
</body>
</html>
和我的瀏覽器中的結果顯示,第一個和第二個記錄實際上並不相同。所以,請有人幫我展示數據庫中的真實記錄。
看我的結果:http://i.stack.imgur.com/2lIM9.png
非常感謝你對我的幫助。
最好的問候,
Faizal Rizky
非常感謝@Jigar,它解決了我的問題:) – faizal
歡迎您:) –