Question

我遇到mySql与Tomcat 8集成的问题。我将详细说明我的步骤以及下面发生的错误。

我已将连接器jar添加到catalina_home / lib
我创建了一个名为testdb的全新数据库，并创建了一个名为TCmySqlSetup的新Web项目
在Meta-inf / context.xml中，我添加了：

<Context antiJARLocking="true" path="/TCmySqlSetup">    
    <Resource name="jdbc/testdb"
    auth="Container"    
    type="javax.sql.DataSource"    
    username="root"    
    password="myPass"    
    driverClassName="com.mysql.jdbc.Driver"    
    url="jdbc:mysql:/localhost:3306/testdb"    
    maxActive="15"    
    maxIdle="3"/>    
</Context>

然后我创建了web.xml

 <web-app>     
 <resource-ref>     
 <description>Db Conn</description>     
 <res-ref-name>jdbc/testdb</res-ref-name>     
 <res-type>javax.sql.DataSource</res-type>     
 <res-auth>Container</res-auth>     
 </resource-ref>     
 </web-app>

在我的index.JSP里面放了

 // InitialContext ctx =null;
 DataSource ds =null;
 Statement stmt= null;
 Connection con = null;
 ResultSet rs = null;
 // try{ Class.forName("com.mysql.jdbc.Driver").newInstance();
 /* ctx = new InitialContext();
 ds = (DataSource) ctx.lookup("java:/comp/env/jdbc/testdb");*/

 Context initCtx = new InitialContext();
 Context envCtx = (Context) initCtx.lookup("java:comp/env");
 ds = (DataSource) envCtx.lookup("jdbc/testdb");

 con = ds.getConnection();
 stmt = con.createStatement();

我没有复制整个代码，因为问题不在于此，它只是简单的列提取......

然后当我尝试运行网站时，我得到了这个：

org.apache.jasper.JasperException: An exception occurred processing
JSP page /index.jsp at line 47

44: 45: 46: 47: 
con = ds.getConnection(); 48: stmt =
con.createStatement(); 49: 50: rs =
stmt.executeQuery("select name from employee");


Stacktrace:
    org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:574)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:461)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause

javax.servlet.ServletException: java.sql.SQLException: Cannot create
JDBC driver of class 'com.mysql.jdbc.Driver' for connect URL
'jdbc:mysql:/localhost:3306/MySQL56'
    org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:909)
    org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:838)
    org.apache.jsp.index_jsp._jspService(index_jsp.java:223)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause

java.sql.SQLException: Cannot create JDBC driver of class
'com.mysql.jdbc.Driver' for connect URL
'jdbc:mysql:/localhost:3306/MySQL56'
org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createConnectionFactory(BasicDataSource.java:2160)
    org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:2032)
    org.apache.tomcat.dbcp.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:1532)
    org.apache.jsp.index_jsp._jspService(index_jsp.java:164)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
root cause

java.sql.SQLException: No suitable driver
org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createConnectionFactory(BasicDataSource.java:2151)
    org.apache.tomcat.dbcp.dbcp2.BasicDataSource.createDataSource(BasicDataSource.java:2032)
    org.apache.tomcat.dbcp.dbcp2.BasicDataSource.getConnection(BasicDataSource.java:1532)
    org.apache.jsp.index_jsp._jspService(index_jsp.java:164)
    org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:438)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:396)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:340)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

我一直在和它斗争很长一段时间，我真的想要做得对，我的大部分代码都适用于我的真实环境，似乎我可以连接而不会以某种方式汇集这段代码

Class.forName("com.mysql.jdbc.Driver").newInstance();

 java.sql.Connection conn;

 conn = DriverManager.getConnection("jdbc:mysql://localhost/testdb","root","peskir123");
 Statement sqlStatement = conn.createStatement();

Tomcat 8 / MySql集成问题

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