[英]No data in resultSet - Jsp Database
我有這個基本代碼來獲取與oracle數據庫的連接並從名為temp_employee的表中檢索一列。 但是,當我編譯時,它不會在網頁上顯示數據。 它沒有顯示錯誤消息。 只是一個空白頁。 您能否幫助使此代碼正常工作?
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import ="java.sql.*" %>
<%@ page import=" javax.sql.DataSource" %>
<html>
<head>
<title>Database</title>
</head>
<body>
<%
Connection connection = null;
try {
// Load the JDBC driver
String driverName = "oracle.jdbc.driver.OracleDriver";
Class.forName(driverName);
connection = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:dev", "root", "root");
Statement statement = connection.createStatement();
ResultSet resultSet = statement.executeQuery("SELECT aadName from temp_employee");
while (resultSet.next()) {
String code = resultSet.getString("aadName");
};
} catch (ClassNotFoundException e) {
out.println("Driver caused Exception : " + e.getMessage() + "");
// Could not find the database driver
} catch (SQLException e) {
// Could not connect to the database
out.println("Database caused Exception : " + e.getMessage() + "");
}
%>
</body>
</html>
在您的html主體中進行一些更改,在Connection聲明之后,聲明String code = null;
並將現有代碼更改為code = resultSet.getString("aadName");
然后在html正文中添加以下行, <h2><%= code %></h2>
實際上,腳本表達式用於將代碼值插入輸出流。
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