spring5遇到的问题及解决方法
学链接池jdbc 的时候遇到的一下这个异常,看了一下是bean1.xml配置文件的url地址遇到的问题
//这个是出问题的代码
<!-- 数据库连接池 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
destroy-method="close">
<property name="url" value="jdbc:mysql:///user_db"/>
<property name="username" value="root"/>
<property name="password" value="******"/>
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
</bean>
7月 20, 2021 4:16:45 下午 com.alibaba.druid.support.logging.JakartaCommonsLoggingImpl error
严重: create connection SQLException, url: jdbc:mysql:///user_db, errorCode 0, state S1000
java.sql.SQLException: Unknown initial character set index '255' received from server. Initial client character set can be forced via the 'characterEncoding' property.
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
at com.mysql.jdbc.ConnectionImpl.configureClientCharacterSet(ConnectionImpl.java:1689)
at com.mysql.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:3444)
at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2062)
at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:723)
at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1513)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1578)
at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2466)
解决办法
在url地址表后添加了一行?characterEncoding=utf8
把字符编码转换为utf8的格式,就好了
修改后的代码
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource"
destroy-method="close">
<property name="url" value="jdbc:mysql:///user_db?characterEncoding=utf8"/>
<property name="username" value="root"/>
<property name="password" value="******"/>
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
</bean>