我创建了一个动态网络应用程序，其中包含互联网的完整指南here。我使用了sql和tomcat 7，所以我提供了所需的机会（虽然我不知道这些可能是问题所在）;
SQLServerConnUtils_SQLJDBC
com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host localhost, port 1433 has failed. Error: "Connection refused: connect. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:191)
at com.microsoft.sqlserver.jdbc.SQLServerException.ConvertConnectExceptionToSQLServerException(SQLServerException.java:242)
at com.microsoft.sqlserver.jdbc.SocketFinder.findSocket(IOBuffer.java:2369)
at com.microsoft.sqlserver.jdbc.TDSChannel.open(IOBuffer.java:551)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1963)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:1628)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectInternal(SQLServerConnection.java:1459)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:773)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:1168)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:270)
at simpleWebApp.conn.SQLServerConnUtils_SQLJDBC.getSQLServerConnection_SQLJDBC(SQLServerConnUtils_SQLJDBC.java:44)
at simpleWebApp.conn.SQLServerConnUtils_SQLJDBC.getSQLServerConnection_SQLJDBC(SQLServerConnUtils_SQLJDBC.java:22)
at simpleWebApp.conn.ConnectionUtils.getConnection(ConnectionUtils.java:12)
at simpleWebApp.filter.JDBCFilter.doFilter(JDBCFilter.java:95)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Eyl 01, 2017 5:21:48 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [simpleWebApp.servlet.HomeServlet] in context with path [/SimpleWebApp] threw exception [null] with root cause
javax.servlet.ServletException
at simpleWebApp.filter.JDBCFilter.doFilter(JDBCFilter.java:112)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
我使用sqljdbc42作为我的jdbc。服务器正在运行。在SCM中启用TCP / IP。
这是控制台结果：
import java.io.IOException;
import java.sql.Connection;
import java.util.Collection;
import java.util.Map;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRegistration;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import simpleWebApp.conn.ConnectionUtils;
import simpleWebApp.utils.MyUtils;
@WebFilter(filterName = "jdbcFilter", urlPatterns = { "/*" })
public class JDBCFilter implements Filter {
public JDBCFilter() {
}
@Override
public void init(FilterConfig fConfig) throws ServletException {
}
@Override
public void destroy() {
}
// Check the target of the request is a servlet?
private boolean needJDBC(HttpServletRequest request) {
System.out.println("JDBC Filter");
//
// Servlet Url-pattern: /spath/*
//
// => /spath
String servletPath = request.getServletPath();
// => /abc/mnp
String pathInfo = request.getPathInfo();
String urlPattern = servletPath;
if (pathInfo != null) {
// => /spath/*
urlPattern = servletPath + "/*";
}
// Key: servletName.
// Value: ServletRegistration
Map<String, ? extends ServletRegistration> servletRegistrations = request.getServletContext()
.getServletRegistrations();
// Collection of all servlet in your webapp.
Collection<? extends ServletRegistration> values = servletRegistrations.values();
for (ServletRegistration sr : values) {
Collection<String> mappings = sr.getMappings();
if (mappings.contains(urlPattern)) {
return true;
}
}
return false;
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest req = (HttpServletRequest) request;
//
// Only open connections for the special requests need
// connection. (For example, the path to the servlet, JSP, ..)
//
// Avoid open connection for commons request
// (for example: image, css, javascript,... )
//
if (this.needJDBC(req)) {
System.out.println("Open Connection for: " + req.getServletPath());
Connection conn = null;
try {
// Create connection
conn = ConnectionUtils.getConnection();
// Set Auto commit to false
conn.setAutoCommit(false);
// Store connection in attribute of request.
MyUtils.storeConnection(request, conn);
// Allow request to go forward
// (Go to the next filter or target)
chain.doFilter(request, response);
// Commit change.
conn.commit();
} catch (Exception e) {
e.printStackTrace();
ConnectionUtils.rollbackQuietly(conn);
throw new ServletException();
} finally {
ConnectionUtils.closeQuietly(conn);
}
}
// With commons requests (images, css, html, ..)
// No need to open the connection.
else {
// Allow request to go forward
// (Go to the next filter or target)
chain.doFilter(request, response);
}
}
我还认为jdbcfilter可能存在问题（它在控制台中说）
button如果您有任何想法，请告诉我。 编辑：Sory在我使用tomcat 7服务器之前没有提及