关于SSM中mybatis向oracle添加语句采用序列自增的问题
在SSM向oracle数据库中插入语句时，报错如下：
### Error updating database. Cause: java.sql.SQLException: 不支持的特性
### SQL: insert into standard(id,zhname,version,keys,release_date,impl_date,ackage_path) values(seq_id.nextval,?,?,?,?,?,?)
### Cause: java.sql.SQLException: 不支持的特性
; uncategorized SQLException for SQL []; SQL state [null]; error code [17023]; 不支持的特性; nested exception is java.sql.SQLException: 不支持的特性
- (8768 ms) - [DEBUG] 2018-03-03 17:08:49,999 org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver - Resolving exception from handler [com.yusys.controller.StandardController@6adb953c]: org.springframework.jdbc.UncategorizedSQLException:
### Error updating database. Cause: java.sql.SQLException: 不支持的特性
### SQL: insert into standard(id,zhname,version,keys,release_date,impl_date,ackage_path) values(seq_id.nextval,?,?,?,?,?,?)
### Cause: java.sql.SQLException: 不支持的特性
; uncategorized SQLException for SQL []; SQL state [null]; error code [17023]; 不支持的特性; nested exception is java.sql.SQLException: 不支持的特性
- (8769 ms) - [DEBUG] 2018-03-03 17:08:50,000 org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver - Resolving exception from handler [com.yusys.controller.StandardController@6adb953c]: org.springframework.jdbc.UncategorizedSQLException:
### Error updating database. Cause: java.sql.SQLException: 不支持的特性
### SQL: insert into standard(id,zhname,version,keys,release_date,impl_date,ackage_path) values(seq_id.nextval,?,?,?,?,?,?)
### Cause: java.sql.SQLException: 不支持的特性
; uncategorized SQLException for SQL []; SQL state [null]; error code [17023]; 不支持的特性; nested exception is java.sql.SQLException: 不支持的特性
- (8769 ms) - [DEBUG] 2018-03-03 17:08:50,000 org.springframework.web.multipart.commons.CommonsMultipartResolver - Cleaning up multipart file [file] with original filename [3.jpg], stored at [D:\java软件安装资源汇总\apache-tomcat-7.0.67\work\Catalina\localhost\standardSystem\upload_a2e87d6c_1c40_4a5f_bc8f_591e429a8a30_00000005.tmp]
- (8771 ms) - [DEBUG] 2018-03-03 17:08:50,002 org.springframework.web.servlet.DispatcherServlet - Could not complete request
org.springframework.jdbc.UncategorizedSQLException:
### Error updating database. Cause: java.sql.SQLException: 不支持的特性
### SQL: insert into standard(id,zhname,version,keys,release_date,impl_date,ackage_path) values(seq_id.nextval,?,?,?,?,?,?)
### Cause: java.sql.SQLException: 不支持的特性
; uncategorized SQLException for SQL []; SQL state [null]; error code [17023]; 不支持的特性; nested exception is java.sql.SQLException: 不支持的特性
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:90)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:82)
at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:82)
at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:75)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:447)
at com.sun.proxy.$Proxy8.insert(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:279)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:57)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)
at com.sun.proxy.$Proxy15.add(Unknown Source)
at com.yusys.service.StandardServiceImpl.add(StandardServiceImpl.java:30)
at com.yusys.controller.StandardController.add(StandardController.java:159)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:180)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:440)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:428)
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.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
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:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
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:956)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Caused by: java.sql.SQLException: 不支持的特性
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:269)
at oracle.jdbc.dbaccess.DBError.throwUnsupportedFeatureSqlException(DBError.java:689)
at oracle.jdbc.driver.OracleConnection.prepareStatement(OracleConnection.java:3360)
at org.apache.commons.dbcp.DelegatingConnection.prepareStatement(DelegatingConnection.java:508)
at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.prepareStatement(PoolingDataSource.java:400)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.ibatis.logging.jdbc.ConnectionLogger.invoke(ConnectionLogger.java:55)
at com.sun.proxy.$Proxy27.prepareStatement(Unknown Source)
at org.apache.ibatis.executor.statement.PreparedStatementHandler.instantiateStatement(PreparedStatementHandler.java:80)
at org.apache.ibatis.executor.statement.BaseStatementHandler.prepare(BaseStatementHandler.java:88)
at org.apache.ibatis.executor.statement.RoutingStatementHandler.prepare(RoutingStatementHandler.java:59)
at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:85)
at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:49)
at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)
at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76)
at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:198)
at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:185)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:434)
... 45 more
解决办法：根据这个现象在网上查了很多，大部分都是说oracle驱动不支持，更换驱动之类的，限于我拥有的驱动资源，不能这么解决，
还查到有人说是：
1、主键没有自增
2、表中字段数据类型与bean中的数据类型不一致，请将数据类型与表中类型一致就可，
这是我突然想到oracle的主键自增与mysql 的主键自增机制不同，故而就是我的mybatis的xml映射语句有问题，于是更改如下：
<!-- 添加 -->
<insert id="add" parameterType="Standard" useGeneratedKeys="true">
<selectKey keyProperty="id" resultType="int" order="BEFORE">
select SEQUENCE_STANDARD.nextval as id from dual
</selectKey>
insert into standard(id,zhname,version,keys,release_date,impl_date,ackage_path)
values(#{id},#{zhname},#{version},#{keys},#{release_date},#{impl_date},#{ackage_path})
</insert>
此时运行，又发现如下报错：
org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property='keys', mode=IN, javaType=class java.lang.String, jdbcType=null, numericScale=null, resultMapId='null', jdbcTypeName='null', expression='null'}. Cause: org.apache.ibatis.type.TypeException: Error setting null for parameter #4 with JdbcType OTHER . Try setting a different JdbcType for this parameter or a different jdbcTypeForNull configuration property. Cause: java.sql.SQLException: 无效的列类型
at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:79)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:447)
at com.sun.proxy.$Proxy8.insert(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:279)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:57)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:53)
at com.sun.proxy.$Proxy15.add(Unknown Source)
at com.yusys.service.StandardServiceImpl.add(StandardServiceImpl.java:30)
at com.yusys.controller.StandardController.add(StandardController.java:159)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:180)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:440)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:428)
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.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
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:220)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
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:956)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:423)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1079)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
Caused by: org.apache.ibatis.type.TypeException: Could not set parameters for mapping: ParameterMapping{property='keys', mode=IN, javaType=class java.lang.String, jdbcType=null, numericScale=null, resultMapId='null', jdbcTypeName='null', expression='null'}. Cause: org.apache.ibatis.type.TypeException: Error setting null for parameter #4 with JdbcType OTHER . Try setting a different JdbcType for this parameter or a different jdbcTypeForNull configuration property. Cause: java.sql.SQLException: 无效的列类型
at org.apache.ibatis.scripting.defaults.DefaultParameterHandler.setParameters(DefaultParameterHandler.java:89)
at org.apache.ibatis.executor.statement.PreparedStatementHandler.parameterize(PreparedStatementHandler.java:93)
at org.apache.ibatis.executor.statement.RoutingStatementHandler.parameterize(RoutingStatementHandler.java:64)
at org.apache.ibatis.executor.SimpleExecutor.prepareStatement(SimpleExecutor.java:86)
at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:49)
at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)
at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76)
at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:198)
at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:185)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:434)
... 45 more
Caused by: org.apache.ibatis.type.TypeException: Error setting null for parameter #4 with JdbcType OTHER . Try setting a different JdbcType for this parameter or a different jdbcTypeForNull configuration property. Cause: java.sql.SQLException: 无效的列类型
at org.apache.ibatis.type.BaseTypeHandler.setParameter(BaseTypeHandler.java:47)
at org.apache.ibatis.scripting.defaults.DefaultParameterHandler.setParameters(DefaultParameterHandler.java:87)
... 58 more
Caused by: java.sql.SQLException: 无效的列类型
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:269)
at oracle.jdbc.driver.OracleStatement.get_internal_type(OracleStatement.java:6164)
at oracle.jdbc.driver.OraclePreparedStatement.setNull(OraclePreparedStatement.java:1316)
at org.apache.commons.dbcp.DelegatingPreparedStatement.setNull(DelegatingPreparedStatement.java:108)
at org.apache.commons.dbcp.DelegatingPreparedStatement.setNull(DelegatingPreparedStatement.java:108)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.ibatis.logging.jdbc.PreparedStatementLogger.invoke(PreparedStatementLogger.java:67)
at com.sun.proxy.$Proxy28.setNull(Unknown Source)
at org.apache.ibatis.type.BaseTypeHandler.setParameter(BaseTypeHandler.java:45)
... 59 more
查找半天，竟然发现是因为我的页面缺少一个上送字段即input标签，而这个在数据库中是要非空的，ε=(´ο｀*)))唉，添加后，该报错消失
关于SSM中mybatis向oracle添加语句采用序列自增的问题的更多相关文章
- Springboot中mybatis控制台打印sql语句
Springboot中mybatis控制台打印sql语句 https://www.jianshu.com/p/3cfe5f6e9174 https://www.jianshu.com/go-wild? ...
- oracle 批量插入-支持序列自增
1.创建表.序列 -- Create table create table test_batch ( id number not null, name ), account ) ) -- Create ...
- 【坑】解决maven管理SSM中mybatis的mapper文件扫描失败的问题
文章目录 前言 改进方式来替换原始的使用方式 后记 好久没有写博客了,11月底来到公司实习,上个月写个小demo,趁此回顾下SSM,今天将最近的积累记录下: 前言 在学习 mybatis 的时候,都知 ...
- 代码中批量执行Oracle SQL语句
今天在写一个工具(winform),作用是批量的INSERT OR UPDATE ORACLE数据库中的一个表. 执行的时候老是报错“[911] ORA-00911: invalid charact ...
- Oracle 添加字段，并自增
第一步:alter table TOWN add ID int 第二步:Update TOWN set id=rownum; Commit;
- mybatis获取插入的语句主键(自增主键)
<insert id="insertUser" parameterType="User"> <selectKey keyProperty=&q ...
- oracle+ibatis 批量插入-支持序列自增
首先请先看我前面一篇帖子了解oracle批量插入的sql:[oracle 批量插入-支持序列自增] 我用的ibatis2.0,sqlMap文件引入的标签如下: <!DOCTYPE sqlMap ...
- mybatis中Oracle分页语句的写法
最近一段时间使用oracle数据库查询分页, 用的是springboot. Oracle数据库中没有像mysql中limit的写法, 只能换其他方式写. 考虑到oracle中的ROWNUM变量, 使用 ...
- Oracle中的Truncate和Delete语句
Oracle中的Truncate和Delete语句 首先讲一下,truncate命令: 语法:TRUNCATE TABLE table; 表格里的数据被清空,存储空间被释放. 运行后会自动 ...
随机推荐
- MySQL的默认隔离级别的实现依赖于MVCC和锁，准确点说就是一致性读和锁。
MySQL的默认隔离级别的实现依赖于MVCC和锁,准确点说就是一致性读和锁.
- lib文件和dll文件
一. 简介 1.1 C++两种库文件 lib包含了函数所在的dll文件和文件中函数位置的信息(入口),代码由运行时加载在进程空间中的dll提供,称为动态链接库dynamic link library. ...
- 5款微信小程序开发工具使用报告，微信官方开发工具还有待提升
微信小程序已经内测有一段时间了,笔者本着好奇加学习的心态写了几个小demo,虽然在MINA框架上并没有遇到太多的坑,但官方开发工具实在不敢恭维. api提示不全,要一个个查api啊,写代码超级慢啊 很 ...
- jqGrid不支持IE8的解决办法
参考:https://blog.csdn.net/tarataotao/article/details/10376657
- display:flex下子元素宽度无效
在子元素上设置: width:60px; flex-shrink:0;
- Python学习第一课——if-else
#if 基本语句 if 1==1: print("如果条件为真,if执行该语句") else: print("如果条件为假,if则执行这条语句") #if 多重 ...
- vue移动端transition兼容
vue移动端transition兼容 .face-recognition .wrapper(:style="{height: viewHeight+'px'}") .face-re ...
- java核心-多线程（6）-线程池-ThreadPoolExecutor
1.java多线程编程少不了使用线程池,线程池相关的工具类所在jdk包,java.util.concurrent 2.使用示例 demo1 public class ThreadPoolDemo { ...
- JdbcTemplate常用方法
JdbcTemplate简介 JdbcTemplate是Spring JDBC的核心类,借助该类提供的方法可以很方便的实现数据的增删改查. Spring对数据库的操作在jdbc上面做了深层次的封装,使 ...
- 十九 Listener
Listener 监听器 一 监听器内部原理:其实就是接口回调 需求:A在执行循环,当循环到5的时候,通知B 事先先把某一个对象传递给A ,当A执行到5的时候,通过这个对象来调用B中的方法 但是不是直 ...