com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown character set: ‘utf8mb4’at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)at java.lang.reflect.Constructor.newInstance(Constructor.java:526)at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)at com.mysql.jdbc.Util.getInstance(Util.java:386)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3609)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3541)at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2002)at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2163)at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2618)at com.mysql.jdbc.ConnectionImpl.configureClientCharacterSet(ConnectionImpl.java:1880)at com.mysql.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:3499)at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2384)at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2153)at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:792)at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)at java.lang.reflect.Constructor.newInstance(Constructor.java:526)at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:381)at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:305)at java.sql.DriverManager.getConnection(DriverManager.java:571)at java.sql.DriverManager.getConnection(DriverManager.java:215)at com.silence.mysqlTest2.JDBCTools.getConnection(JDBCTools.java:130)at com.silence.mysqlTest2.JDBCTest.testInsertBlob(JDBCTest.java:82)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:606)at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)at org.junit.runners.ParentRunner.run(ParentRunner.java:309)at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Unknown character set: ‘utf8mb4’,刚开始看的时候还以为是mysql的字符编码和项目的编码的不一致导致的，改
了半天也不管用，，在网上找了半天，其实不是什么字符编码的问题，就是mysql驱动的问题，我把用的mysql-
connector-java5.1.26改为mysql-connector-java5.1.6就没报错了。
不要因为世态变迁而埋怨,不要因为命运多舛而怨恨.
