[英]unable to connect to Azure SQL database from Jsp
我是MS Azure的新手，正在尝试使用以下代码连接到Azure中的SQL数据库。
当我发布相同的代码并尝试在Azure中访问它时，出现404错误。 另外，如果我使用相同的代码从本地服务器连接它，连接也会被拒绝。 我已经附上了错误以及这个问题。 谁能帮我？
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@page import="java.sql.*" %>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>DB connection</title>
</head>
<body>
<h1>Azure DB connection</h1>
<%
final String DB_URL =
"jdbc:jtds:sqlserver://pkynvzyf2a.database.windows.net/nj-javapocdb";
// Database credentials
final String USER = "Username";
final String PASS = "Password";
Connection conn = null;
Statement stmt = null;
try{
//STEP 2: Register JDBC driver
Class.forName("net.sourceforge.jtds.jdbc.Driver");
//STEP 3: Open a connection
System.out.println("Connecting to database...");
conn = DriverManager.getConnection(DB_URL,USER,PASS);
//STEP 4: Execute a query
System.out.println("Creating statement...");
stmt = conn.createStatement();
String sql = "SELECT StudentID, FirstName, LastName FROM
StudentDetails";
ResultSet rs = stmt.executeQuery(sql);
//STEP 5: Extract data from result set
while(rs.next()){
//Retrieve by column name
Integer id = rs.getInt("StudentID");
String last = rs.getString("LastName");
String first = rs.getString("FirstName");
//Display values
System.out.print("ID: " + id);
System.out.print(", First: " + first);
System.out.println(", Last: " + last);
}
//STEP 6: Clean-up environment
rs.close();
stmt.close();
conn.close();
}catch(SQLException se){
//Handle errors for JDBC
se.printStackTrace();
}catch(Exception e){
//Handle errors for Class.forName
e.printStackTrace();
}finally{
//finally block used to close resources
try{
if(stmt!=null)
stmt.close();
}catch(SQLException se2){
}// nothing we can do
try{
if(conn!=null)
conn.close();
}catch(SQLException se){
se.printStackTrace();
}//end finally try
}//end try
System.out.println("Goodbye!");
%>
</body>
</html>
本地错误：
Connecting to database...
java.sql.SQLException: Network error IOException: Connection refused:
connect
Goodbye!
at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:436)
at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
at java.sql.DriverManager.getConnection(Unknown Source)
at java.sql.DriverManager.getConnection(Unknown Source)
at org.apache.jsp.index_jsp._jspService(index_jsp.java:141)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.jasper.servlet.JspServletWrapper.service
(JspServletWrapper.java:438)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:217)
at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke
(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke
(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service
(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process
(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process
(AbstractProtocol.java:673)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun
(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run
(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run
(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.ConnectException: Connection refused: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at net.sourceforge.jtds.jdbc.SharedSocket.createSocketForJDBC3
(SharedSocket.java:288)
at net.sourceforge.jtds.jdbc.SharedSocket.<init>(SharedSocket.java:251)
at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:331)
... 31 more
默认情况下，Azure中的所有服务均被锁定并安全。 因此，您需要允许访问SQL Azure实例。
请参阅如何为Azure SQL数据库实例配置防火墙设置 。
无法使用JDBC连接到Azure SQL数据库-SSL错误
[英]Unable to connect to Azure sql database using JDBC - error with SSL
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