Java 如何配置TOMCAT7和MySql_Java_Mysql_Jsp_Tomcat

Java 如何配置TOMCAT7和MySql

java mysql jsp tomcat

Java 如何配置TOMCAT7和MySql,java,mysql,jsp,tomcat,Java,Mysql,Jsp,Tomcat,TOMCAT7本地服务器有一个大问题。我遵循这个指南=>。我这样做是为了： 1）将JDBC驱动程序的jar复制到$CATALINA_HOME/lib中。我的“$CATALINA_HOME/lib”在/usr/share/tomcat7/lib中（我想是的，我不确定）。我在那里复制了文件mysql-connector-java-5.1.38-bin.jar 2）我创建了一个新的MySql用户，并遵循rest MySql指令： mysql> GRANT ALL PRIVILEGES ON

TOMCAT7本地服务器有一个大问题。我遵循这个指南=>。我这样做是为了：

1）

将JDBC驱动程序的jar复制到$CATALINA_HOME/lib中

。我的“$CATALINA_HOME/lib”在/usr/share/tomcat7/lib中（我想是的，我不确定）。我在那里复制了文件

mysql-connector-java-5.1.38-bin.jar

2）我创建了一个新的MySql用户，并遵循rest MySql指令：

mysql> GRANT ALL PRIVILEGES ON *.* TO javauser@localhost
    ->   IDENTIFIED BY 'javadude' WITH GRANT OPTION;
mysql> create database javatest;
mysql> use javatest;
mysql> create table testdata (
    ->   id int not null auto_increment primary key,
    ->   foo varchar(25),
    ->   bar int);

3）我在以下模式下修改了

context.xml

文件，该文件位于

/var/lib/tomcat7/webapps/ROOT/META-INF

位置

<Context>

    <!-- maxActive: Maximum number of database connections in pool. Make sure you
         configure your mysqld max_connections large enough to handle
         all of your db connections. Set to -1 for no limit.
         -->

    <!-- maxIdle: Maximum number of idle database connections to retain in pool.
         Set to -1 for no limit.  See also the DBCP documentation on this
         and the minEvictableIdleTimeMillis configuration parameter.
         -->

    <!-- maxWait: Maximum time to wait for a database connection to become available
         in ms, in this example 10 seconds. An Exception is thrown if
         this timeout is exceeded.  Set to -1 to wait indefinitely.
         -->

    <!-- username and password: MySQL username and password for database connections  -->

    <!-- driverClassName: Class name for the old mm.mysql JDBC driver is
         org.gjt.mm.mysql.Driver - we recommend using Connector/J though.
         Class name for the official MySQL Connector/J driver is com.mysql.jdbc.Driver.
         -->

    <!-- url: The JDBC connection url for connecting to your MySQL database.
         -->

  <Resource name="jdbc/TestDB" auth="Container" type="javax.sql.DataSource"
               maxActive="100" maxIdle="30" maxWait="10000"
               username="javauser" password="javadude" driverClassName="com.mysql.jdbc.Driver"
               url="jdbc:mysql://localhost:3306/javatest"/>

</Context>

5）然后，我在/var/lib/tomcat7/webapps/ROOT位置中创建了dir DBTEST，并在此处插入文件test.jsp，其中包含以下代码：

<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>

<sql:query var="rs" dataSource="jdbc/TestDB">
select id, foo, bar from testdata
</sql:query>

<html>
  <head>
    <title>DB Test</title>
  </head>
  <body>

  <h2>Results</h2>

<c:forEach var="row" items="${rs.rows}">
    Foo ${row.foo}<br/>
    Bar ${row.bar}<br/>
</c:forEach>

  </body>
</html>

然后（始终按照说明）我在

var/lib/tomcat7/webapps/ROOT/META-INF

==>

var/lib/tomcat7/webapps/ROOT/META-INF/lib

在这里面，我复制了4.jar文件

现在

http://localhost:8080/DBtest/test.jsp

The absolute uri: http://java.sun.com/jsp/jstl/sql cannot be resolved in either web.xml or the jar files deployed with this application

还有一次两个人回来

java.lang.ClassNotFoundException: org.apache.jsp.DBtest.test_jsp

jar进入

/lib

而不是

/META-INF/lib

AFAIKThanks，我在/lib中复制了te 4文件*.jar（不是var/lib，只有lib）。也有同样的问题！4 files.jar是否正确？“/lib”我的意思是

/var/lib/tomcat7/webapps/ROOT/WEB-INF/lib

，请参阅文档：抱歉，我不清楚：在ROOT目录中，我只有以下子目录：DBtest和META-INF

The absolute uri: http://java.sun.com/jsp/jstl/sql cannot be resolved in either web.xml or the jar files deployed with this application

java.lang.ClassNotFoundException: org.apache.jsp.DBtest.test_jsp