用jaydebeapi用Python连接MYSQL DB

Question

我试图通过MySQL提示符并使用JayDeBeApi连接到Python。下面是我正在使用的代码：

"**Python 2.7.16 (default, Oct 10 2019, 22:02:15) 
[GCC 8.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import jpype
>>> import jaydebeapi
>>> import os
>>> jar = "/tmp/:/usr/share/java/"
>>> os.environ['JAVA_HOME'] ="/usr/lib/jvm/adoptopenjdk-8-hotspot-amd64"
>>> os.environ['CLASSPATH'] =jar
>>> args='-Djava.class.path=%s' % jar
>>> jvm_path = jpype.getDefaultJVMPath()
>>> jpype.startJVM(jvm_path, args)
/home/aarpan_roy/.local/lib/python2.7/site-packages/jpype/_core.py:218: UserWarning: 
-------------------------------------------------------------------------------
Deprecated: convertStrings was not specified when starting the JVM. The default
behavior in JPype will be False starting in JPype 0.8. The recommended setting
for new code is convertStrings=False.  The legacy value of True was assumed for
this session. If you are a user of an application that reported this warning,
please file a ticket with the developer.
-------------------------------------------------------------------------------

  """)
>>> database_host='<MySQL DB HOST>'
>>> database_user='<MySQL DB USER>'
>>> database_password='<MySQL DB PASSWORD>'
>>> database_port='<MySQL DB PORT>'
>>> database_db='<MySQL DB DATABASE>'
>>> jclassname = "com.mysql.jdbc.Driver"
>>> url = "jdbc:mysql://{host}:{port}/{database}".format(host=database_host, port=database_port, database=database_db)
>>> driver_args = [url, database_user, database_password]
>>> jars = ["/tmp/mysql-connector-java-5.1.45.jar","/usr/share/java/mysql.jar"]
>>> libs = None
>>> cnx = jaydebeapi.connect(jclassname, url, driver_args, jars=jars, libs=libs)**

但是，下面是错误："Traceback (最近一次调用)：File“，第1行，在File "/.local/lib/python2.7/site-packages/jaydebeapi/init.py"，第412行，在connect jconn = _jdbc_connect(jclassname，url，driver_args，jar，libs)文件"/.local/lib/python2.7/site-packages/jaydebeapi/init.py"，行221，在"/.local/lib/python2.7/site-packages/jpype/_jclass.py"，jpype.JClass(jclassname)文件第130行中，在新返回_JClassNew(args，**kwargs)文件第228行中，在_JClassNew javaClass = _jpype.PyJPClass(arg) jpype._jclass.NoClassDefFoundError: java.lang.NoClassDefFoundError: com/mysql/jdbc/Driver中“

你能帮我弄清楚我在哪里漏掉了什么东西吗?这里需要纠正什么？提前谢谢。

Answer 1

我无法在指定的类路径上找到正确的mysql驱动程序JAR。因此，您得到了您正在看到的ClassNotFoundException。尝试指定它的确切路径。