在開發中，遇到這樣一個需求，在介質資料新增時，需要生成一個介質編號，格式為"JZ+yyyyMMDD+4位遞增數字" 先是使用百度找尋解決方法。解決方法 裡面的查詢緩存的方法在我這項目里沒有，我也不會寫。就自己想了個折中的方法，再請求這個介面的時候，先去資料庫查詢MAX(id)，如果有，就在此基礎上+ ...
首先確定當前hive的版本
例如：我目前的版本就是hive-common-1.1.0-cdh5.16.2.jar
註意：引入的Hive-jdbc依賴需與Hive版本保持一致。
依次對應hive-common-1.1.0引入的Hive-jdbc版本為1.1.0(其中排除log4j依賴是為瞭解決原工程引入Hive依賴後導致日誌不輸出問題)
<dependency>
<groupId>org.apache.hive</groupId>
<artifactId>hive-jdbc</artifactId>
<version>1.1.0</version>
<exclusions>
<exclusion>
<groupId>org.eclipse.jetty.aggregate</groupId>
<artifactId>*</artifactId>
</exclusion>
<exclusion>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
</exclusion>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
<exclusion>
<groupId>org.apache.log4j</groupId>
<artifactId>org.apache.hive.org.apache.log4j</artifactId>
</exclusion>
<exclusion>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
</exclusion>
</exclusions>
</dependency>
關引入Hive-jdbc1.1.0再去嘗試連接同樣會發生報錯
報錯信息如下
java.lang.NoClassDefFoundError: org/apache/hadoop/conf/Configuration at org.apache.hive.jdbc.HiveConnection.createBinaryTransport(HiveConnection.java:393) at org.apache.hive.jdbc.HiveConnection.openTransport(HiveConnection.java:187) at org.apache.hive.jdbc.HiveConnection.<init>(HiveConnection.java:163) at org.apache.hive.jdbc.HiveDriver.connect(HiveDriver.java:105) at java.sql.DriverManager.getConnection(DriverManager.java:664) at java.sql.DriverManager.getConnection(DriverManager.java:247) at com.hundsun.duqa.admin.api.service.DuqaHiveJDBCTest.test2(DuqaHiveJDBCTest.java:42) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75) at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86) at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230) at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58) Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.conf.Configuration at java.net.URLClassLoader.findClass(URLClassLoader.java:382) at java.lang.ClassLoader.loadClass(ClassLoader.java:418) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355) at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ... 35 more
產生錯誤的原因是我們需要同樣引入Hadoop-common包，這裡我選擇的是2.6.5
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>2.6.5</version>
<exclusions>
<exclusion>
<artifactId>servlet-api</artifactId>
<groupId>javax.servlet</groupId>
</exclusion>
<exclusion>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
</exclusion>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
</exclusion>
<exclusion>
<groupId>org.apache.log4j</groupId>
<artifactId>org.apache.hive.org.apache.log4j</artifactId>
</exclusion>
<exclusion>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
</exclusion>
</exclusions>
</dependency>
再去測試我們的Demo，成功了！
Demo代碼如下：
public void test2() throws Exception{ // 註冊資料庫驅動，用的hive的jdbc，驅動名固定寫死 Class.forName("org.apache.hive.jdbc.HiveDriver"); // 如果用的是hive2服務，則寫jdbc:hive2，後面跟上hive伺服器的ip以及埠號，埠號預設是10000 Connection conn = DriverManager.getConnection("jdbc:hive2://1伺服器IP:10000/庫名", "用戶名", "密碼"); Statement stat = conn.createStatement(); ResultSet rs = stat.executeQuery("select api_id from idc.ods_duas_data_services_mng where thedate = '20220424' and api_id regexp 'companyInfo'"); while (rs.next()) { String api_id = rs.getString("api_id"); System.out.println(api_id); } stat.close(); conn.close(); }
完美解決SpringBoot通過jdbc連接Hive問題！
