无法使用spring jdbctemplate在我的mysql表中设置自动增量值

Question

我创建了一个包含三列的简单表， --> empid、name 和 location。这里 empid 有属性主键，不是 null 和自动增量。

当我使用 jdbctemplate 设置值时，它会抛出 sql 异常

org.springframework.jdbc.BadSqlGrammarException: PreparedStatementCallback; bad SQL grammar [insert into employees values(?,?)]; nested exception is java.sql.SQLException: Column count doesn't match value count at row 1

我的代码如下

@Override
public boolean addEmployee(EmployeeMO emp) throws EmiratesException {
    boolean isEmployeeAdded = false;
    try {
        String sql = "insert into employees values(?,?)";


        jdbcTemplate.update(sql, new Object[] { emp.getEmpName(), emp.getLocation() });


        isEmployeeAdded = true;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return isEmployeeAdded;
}

我的总异常日志是

PreparedStatementCallback; bad SQL grammar [insert into employees values(?,?)]; nested exception is java.sql.SQLException: Column count doesn't match value count at row 1
at org.springframework.jdbc.support.SQLStateSQLExceptionTranslator.doTranslate(SQLStateSQLExceptionTranslator.java:99)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:73)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:81)
at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:649)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:870)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:931)
at org.springframework.jdbc.core.JdbcTemplate.update(JdbcTemplate.java:941)
at com.emirates.dao.EmployeeDAOImpl.addEmployee(EmployeeDAOImpl.java:24)
at com.emirates.service.EmployeeServiceImpl.addEmployee(EmployeeServiceImpl.java:17)
at com.emirates.controller.EmployeeAddController.loginProcess(EmployeeAddController.java:33)
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.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:133)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:97)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:967)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:901)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1115)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)

Caused by: java.sql.SQLException: Column count doesn't match value count at row 1

为什么 empid 设置不正确？任何想法

Answer 1

您需要在插入语句中指定列的名称。 SQL 应该是：

insert into employees (name, location) values (?, ?)

来自MySQL documentation：

指定语句为其提供值的列，如下所示：

在表名之后提供一个以逗号分隔的列名的括号列表。在这种情况下，每个命名列的值必须由 VALUES 列表或 SELECT 语句提供。

如果您没有为 INSERT ... VALUES 或 INSERT ... SELECT 指定列名列表，则表中每一列的值必须由 VALUES 列表或 SELECT 语句提供。如果不知道表中各列的顺序，可以使用 DESCRIBE tbl_name 查找。