运行时报错：comp is not bound in this Context

Question

我在tomcat里配置的数据源,数据驱动是最新下载的。怎么也调不出来。
运行时报错：
javax.servlet.ServletException: Name java:comp is not bound in this Context
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.login_jsp._jspService(login_jsp.java:113)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
请各位高手指点下，谢谢了！！！

Answer 1

看看这个
http://www.pconline.com.cn/pcedu/empolder/gj/java/0411/503328.html建议把数据源配置写在自己的应用的xml里面，这样做简单而且不会有问题。

Answer 2

老大我看过了：
<Context path="/ELProject" docBase="ELProject" debug="0"  reloadable="true" crossContext="true">   
   <Resource name="jdbc/ey" auth="Container" type="javax.sql.DataSource"/>   
     <ResourceParams name="jdbc/ey">
        <parameter>
            <name>factory</name>
            <value>org.apache.commons.dbcp.BasicDataSourceFactory</value>
        </parameter>
  <parameter>
           <name>driverClassName</name>
            <value>com.microsoft.jdbc.sqlserver.SQLServerDriver</value>
        </parameter>
  <parameter>
           <name>url</name>
           <value>jdbc:microsoft:sqlserver://127.0.0.1:1433;DatabaseName=EasyDB</value>              </parameter>
        <parameter>
     <name>username</name>
           <value>sa</value>
  </parameter>
        <parameter>
     <name>password</name>
     <value></value>
        </parameter>
        <parameter>
     <name>maxActive</name>
             <value>20</value>
  </parameter>
        <parameter>
           <name>maxIdle</name>
     <value>10</value>
  </parameter>
     <parameter>
           <name>maxWait</name>
             <value>-1</value>
          </parameter>
    </ResourceParams> 
</Context>

Answer 3

我在javaBean这获取的
   try
                {
                    Context initCtx = new javax.naming.InitialContext();
                    Context envCtx = (Context) initCtx.lookup("java:comp/env");
                    DataSource ds = (DataSource)envCtx.lookup("jdbc/ey");
                    return ds.getConnection();                }
                catch(SQLException e)
                {
                    throw e;
                }
                catch(NamingException e)
                {
                    throw e;
                }
以前可以用现在不能用了，老报上面那个错！！！我都快疯了。请帮帮忙。我在网上也找了很多资料，就是没解决~~~~~~~~~~~~~~~~~~~

Answer 4

给你看看我的
<?xml version='1.0' encoding='utf-8'?>
<Context displayName="Apache-Axis" docBase="Axis" path="/Axis">
 
  <Resource name="jdbc/acc" type="javax.sql.DataSource"/>
    <ResourceParams name="jdbc/acc">
      <parameter>
        <name>validationQuery</name>
        <value></value>
      </parameter>
      <parameter>
        <name>maxWait</name>
        <value>5000</value>
      </parameter>
      <parameter>
        <name>maxActive</name>
        <value>4</value>
      </parameter>
      <parameter>
        <name>password</name>
        <value></value>
      </parameter>
      <parameter>
        <name>url</name>
        <value>jdbc:microsoft:sqlserver://sh-tiger:1433;DatabaseName=accdb</value>
      </parameter>
      <parameter>
        <name>driverClassName</name>
        <value>com.microsoft.jdbc.sqlserver.SQLServerDriver</value>
      </parameter>
      <parameter>
        <name>maxIdle</name>
        <value>2</value>
      </parameter>
      <parameter>
        <name>username</name>
        <value>sa</value>
      </parameter>
    </ResourceParams>
  
</Context>

Answer 5

程序 private Connection GetConnection() throws Exception {
Context ctx;
DataSource ds;
Connection conn = null;
                  String JNDI_NAME="java:comp/env/jdbc/acc"; ctx = new InitialContext();
try {
ds = (DataSource) ctx.lookup(JNDI_NAME);
conn = ds.getConnection();
} catch (Exception E) {
throw new Exception(E.getMessage());
}
return conn;
}

Answer 6

老救命呀，还是这样子：
javax.servlet.ServletException: Name java:comp is not bound in this Context
at org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
at org.apache.jsp.login_jsp._jspService(login_jsp.java:111)

Answer 7

大老救命呀!!!还是这样子：
javax.servlet.ServletException: Name java:comp is not bound in this Context
at org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
at org.apache.jsp.login_jsp._jspService(login_jsp.java:111)