当我尝试在IDEA中运行代码时,我没有收到此错误,但在我打包并尝试使用
运行jar之后java -cp app.jar com.hive.connect.controller.RecordController
我得到了这个例外。
java.lang.ClassNotFoundException: org.apache.hive.jdbc.HiveDriver
我的maven
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.hive</groupId>
<artifactId>hive-jdbc</artifactId>
<version>1.1.0</version>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-core</artifactId>
<version>1.2.1</version>
</dependency>
</dependencies>
我的代码
public class RecordController {
private static String driverName = "org.apache.hive.jdbc.HiveDriver";
public static void main(String[] args) throws SQLException, ClassNotFoundException {
Class.forName(driverName);
Connection con = DriverManager
.getConnection("jdbc:hive2://host:port/db;" +
"principal=principal");
Statement stmt = con.createStatement();
String tableName = "evkuzmin_testHiveDriverTable";
stmt.execute("drop table if exists " + tableName);
stmt.execute("create table " + tableName + " (key int, value string)");
}
}
为什么会这样?
EDIT 完整错误
Exception in thread "main" java.lang.ClassNotFoundException: org.apache.hive.jdbc.HiveDriver
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:190)
at com.hive.connect.controller.RecordController.main(RecordController.java:18)
答案 0 :(得分:0)
试试这样:
"%JAVA_HOME%\bin\java.exe" -cp "%~dp0\hive-jdbc.jar;%~dp0\app.jar" com.hive.connect.controller.RecordController
而不是:
java -cp app.jar com.hive.connect.controller.RecordController
该错误是由于在尝试运行Java代码时无法使用Hive JDBC jar(内部尝试加载Hive JDBC jar)
希望这有帮助!
答案 1 :(得分:0)
1 - 如果您使用的是maven,则必须在pom.xml文件中添加
<dependency>
<groupId>org.apache.hive</groupId>
<artifactId>hive-jdbc</artifactId>
<version>0.8.1</version>
</dependency>
2.您也可以下载上面提到的jar。
这始终正常工作。