MySql系列：中文写入数据库出现错误java.sql.SQLException: Incorrect string value: '\xE5\xxxx' for column 'xxxx' at row 1及其解决方法

在将kft-activiti-demo的数据库连接改为mysql之后，可以正常登陆，但是在新建请假流程的时候出现如下错误：   Caused by: java.sql.SQLException: Incorrect string value: '\xE5\x85\xAC\xE4\xBC\x91' for column 'leave_type' at row 1 at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:998) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3847) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3783) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2447) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2594) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2545) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1901) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2113) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2049) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2034) at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:105) at org.apache.commons.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:105) at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:133) ... 122 more   经过查找发发现是由于mysql连接设置的有问题，在application.properitis中设置的连接如下： jdbc.url=jdbc:mysql://localhost:3306/kafeitu?useUnicode=true&characterEncoding=utf-8    应该改为： jdbc.url= jdbc:mysql://localhost:3306/kafeitu?useUnicode=true&characterEncoding=utf-8