org.springframework.dao.TransientDataAccessResourceException: ### Error updating database. Cause: java.sql.SQLException: Connection is read-only. Queries leading to data modification are not allowed ### The error may involve defaultParameterMap ### T
java.sql.SQLException: Connection is read-only. Queries leading to data modification are not allowed 追查原因,查看切片事务配置如下: 查看源码: 初始化阶段-Step1:解析到xml配置,在RuleBasedTransactionAttribute中设置query*开发的方法的readOnly值为true save等方法设置为fase: 运行阶段-Step1:(切片事务运行的逻辑大概简单说下:就
JDBC连接操作数据库流程:1.将数据库驱动jar包放在lib文件夹下. 2.定义驱动名(driver),数据库url,username,password字符串常量 3.注册数据库驱动Class.forName() 4.驱动管理类(DriverManager)实现连接接口. 5.通过statement类执行SQL语句获得Resultset结果 6.对结果的处理 java.sql类 Connection:a session with a specific database; 常用方法:Statem
代码如下: final Connection conn=pool.remove(0); //利用动态代理改造close方法 Connection proxy= (Connection) Proxy.newProxyInstance(conn.getClass().getClassLoader(), conn.getClass().getInterfaces(), new InvocationHandler() { @Override public Object invoke(Object pro
博客分类: Oracle Tomcat服务器下的应用连接Oracle时报错,出现以下异常: java.sql.SQLException: Io 异常: Got minus one from a read call 查询数据库连接情况: SQL> select username,count(username) from v$session where username is not null group by username; USERNAME C
1 详细异常 ser class threw exception: java.sql.SQLException: The last packet successfully received from the server was 39,444 milliseconds ago. The last packet sent successfully to the server was 39,444 milliseconds ago. is longer than the server configu