找不到 JNDI 资源 Tomcat 7

Question

在我的测试机器上的 eclipse 中一切正常，但是当我将 WAR 部署到服务器时，每次尝试连接数据库时都会收到 "Cannot locate JNDI Resource" 错误。

我正在使用 WEB-INF/context.xml 中的资源。 mysql-connector-java-5.1.25-bin.jar 位于应用程序的 lib 文件夹中。我已经尝试了我能想到的一切。我假设它是一个 tomcat 特定问题，因为它在 eclipse 中的 tomcat 安装上运行良好。是否缺少我的设置？

context.xml

<?xml version="1.0" encoding="UTF-8"?>
<Context>
<Resource
        name="jdbc/appointmentree" type="javax.sql.DataSource"
        maxActive="100" maxIdle="30" maxWait="10000"
        url="jdbc:mysql://1.1.1.1/appointmentree"
        driverClassName="com.mysql.jdbc.Driver"
        username="appointmentree" password="password"
    />
</Context>

产生的错误：

fm.sprout.java.db.DatabaseConnectionException: appointmentree is missing in JNDI.
    fm.sprout.java.db.DBConnection.<init>(DBConnection.java:17)
    fm.sprout.java.db.MySqlDBHandler.find(MySqlDBHandler.java:108)
    com.appointmentree.db.DBUser.findAll(DBUser.java:173)
    com.appointmentree.db.DBUser.find(DBUser.java:146)
    com.appointmentree.db.DBUser.find(DBUser.java:142)
    com.appointmentree.obj.User.getInstance(User.java:39)
    com.appointmentree.seeds.Login.handle(Login.java:39)
    fm.sprout.java.forms.FormHandler.init(FormHandler.java:53)
    fm.sprout.java.views.SeedBuilder.post(SeedBuilder.java:103)
    com.appointmentree.seeds.Login.onLoad(Login.java:33)
    fm.sprout.java.views.SeedPlanter.sow(SeedPlanter.java:131)
    fm.sprout.java.session.RequestHandler.doPost(RequestHandler.java:30)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    com.appointmentree.session.UserSessionFilter.doFilter(UserSessionFilter.java:72)
root cause

javax.naming.NamingException: com.mysql.jdbc.Driver
    org.apache.naming.NamingContext.lookup(NamingContext.java:859)
    org.apache.naming.NamingContext.lookup(NamingContext.java:153)
    org.apache.naming.NamingContext.lookup(NamingContext.java:830)
    org.apache.naming.NamingContext.lookup(NamingContext.java:153)
    org.apache.naming.NamingContext.lookup(NamingContext.java:830)
    org.apache.naming.NamingContext.lookup(NamingContext.java:153)
    org.apache.naming.NamingContext.lookup(NamingContext.java:830)
    org.apache.naming.NamingContext.lookup(NamingContext.java:167)
    org.apache.naming.SelectorContext.lookup(SelectorContext.java:156)
    javax.naming.InitialContext.lookup(InitialContext.java:411)
    fm.sprout.java.db.DBConnection.<init>(DBConnection.java:15)
    fm.sprout.java.db.MySqlDBHandler.find(MySqlDBHandler.java:108)
    com.appointmentree.db.DBUser.findAll(DBUser.java:173)
    com.appointmentree.db.DBUser.find(DBUser.java:146)
    com.appointmentree.db.DBUser.find(DBUser.java:142)
    com.appointmentree.obj.User.getInstance(User.java:39)
    com.appointmentree.seeds.Login.handle(Login.java:39)
    fm.sprout.java.forms.FormHandler.init(FormHandler.java:53)
    fm.sprout.java.views.SeedBuilder.post(SeedBuilder.java:103)
    com.appointmentree.seeds.Login.onLoad(Login.java:33)
    fm.sprout.java.views.SeedPlanter.sow(SeedPlanter.java:131)
    fm.sprout.java.session.RequestHandler.doPost(RequestHandler.java:30)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    com.appointmentree.session.UserSessionFilter.doFilter(UserSessionFilter.java:72)

web.xml

中的资源

<resource-env-ref>
    <resource-env-ref-name>jdbc/appointmentree</resource-env-ref-name>
    <resource-env-ref-type>javax.sql.DataSource</resource-env-ref-type>
  </resource-env-ref>

Answer 1

试试这个：

<resource-ref>
    <res-ref-name>jdbc/appointmentree</res-ref-name>
    <res-ref-type>javax.sql.DataSource</res-ref-type>
    <res-auth>Container</res-auth>
  </resource-ref>

我从这里得到了这个信息：http://tomcat.apache.org/tomcat-7.0-doc/config/context.html#Resource_Definitions

Answer 2

原来我没有在 CATALINA_HOME/lib 文件夹中包含 mysql 连接器 jar。我的印象是将连接器放在应用程序的 lib 文件夹中就足够了，但我错了。

来自另一个 Whosebug question/answer：Tomcat does not recognize the MySQL .jar library

It's not going to work in WEB-INF/lib since the container needs access to the library, and, that is putting it in the classloader of one web app, not the container. While I would have imagined the CLASSPATH approach would work, it's not the standard way to do this. Perhaps there is some other snag that's preventing it from working.

找不到 JNDI 资源 Tomcat 7

Cannot Locate JNDI Resource Tomcat 7

java

tomcat7