多键插入尝试方法

这里的时候是什么错误我想：多键插入尝试方法

private int insertMaterial(AddMaterial add) { 
    final String INSERT = 
       "insert into material (name, keywords, started, finished, subject, description, c_method, c_time, financer, f_time, g_where, g_when, projectname, project_duration, projectleader, projectresearcher, projectfinancer, publication_details, financed, granted, project, publication) values (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?);"; 


    Object[] values = new Object[]{ 

     add.getMaterial().getName(), 
     add.getMaterial().getKeywords(), 
     add.getMaterial().getStarted(), 
     add.getMaterial().getFinished(), 
     add.getMaterial().getSubject(), 
     add.getMaterial().getDescription(), 
     add.getMaterial().getcMethod(), 
     add.getMaterial().getcTime(), 
     add.getMaterial().getFinancer(), 
     add.getMaterial().getfTime(), 
     add.getMaterial().getgWhere(), 
     add.getMaterial().getgWhen(), 
     add.getMaterial().getProjectName(), 
     add.getMaterial().getProjectDuration(), 
     add.getMaterial().getProjectLeader(), 
     add.getMaterial().getProjectResearcher(), 
     add.getMaterial().getProjectFinancer(), 
     add.getMaterial().getPublicationDetails(), 
     add.getMaterial().isFinanced(), 
     add.getMaterial().isGranted(), 
     add.getMaterial().isProject(), 
     add.getMaterial().isPublication() 

     }; 

    PreparedStatementCreatorFactory psc = new PreparedStatementCreatorFactory(INSERT); 
     psc.addParameter(new SqlParameter("name", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("keywords", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("started", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("finished", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("subject", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("description", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("c_method", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("c_time", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("financer", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("f_time", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("g_where", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("g_when", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("projectname", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("project_duration", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("projectleader", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("projectresearcher", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("projectfinancer", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("publication_details", Types.VARCHAR)); 
     psc.addParameter(new SqlParameter("financed", Types.BOOLEAN)); 
     psc.addParameter(new SqlParameter("granted", Types.BOOLEAN)); 
     psc.addParameter(new SqlParameter("project", Types.BOOLEAN)); 
     psc.addParameter(new SqlParameter("publication", Types.BOOLEAN)); 





     psc.setReturnGeneratedKeys(true); 
     KeyHolder generatedKeyHolder = new GeneratedKeyHolder(); 
     getJdbcTemplate().update(psc.newPreparedStatementCreator(values), generatedKeyHolder); 



     return generatedKeyHolder.getKey().intValue();

我使用Postgres的，所以此方法应该返回连载专栏id的值。但是，所有获得这是

 
org.springframework.web.util.NestedServletException: Request processing failed; nested exception is org.springframework.dao.InvalidDataAccessApiUsageException: The getKey method should only be used when a single key is returned. The current key entry contains multiple keys: [{name=uu, keywords=, id=null, started=, finished=, subject=, description=, c_method=, c_time=, financer=, f_time=, g_where=, g_when=, projectname=, project_duration=, projectleader=, projectresearcher=, projectfinancer=, publication_details=, financed=false, project=false, publication=true, granted=false}] 
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:659) 
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:563) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:637) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:717) 

root cause 

org.springframework.dao.InvalidDataAccessApiUsageException: The getKey method should only be used when a single key is returned. The current key entry contains multiple keys: [{name=uu, keywords=, id=null, started=, finished=, subject=, description=, c_method=, c_time=, financer=, f_time=, g_where=, g_when=, projectname=, project_duration=, projectleader=, projectresearcher=, projectfinancer=, publication_details=, financed=false, project=false, publication=true, granted=false}] 
org.springframework.jdbc.support.GeneratedKeyHolder.getKey(GeneratedKeyHolder.java:65) 
fi.utu.aineistopankki.database.JdbcDatabaseManager.insertMaterial(JdbcDatabaseManager.java:89) 
fi.utu.aineistopankki.database.JdbcDatabaseManager.insertAddMaterialValues(JdbcDatabaseManager.java:174) 
fi.utu.aineistopankki.database.JdbcDatabaseManager$$FastClassByCGLIB$$802c3a1f.invoke() 
net.sf.cglib.proxy.MethodProxy.invoke(MethodProxy.java:191) 
org.springframework.aop.framework.Cglib2AopProxy$CglibMethodInvocation.invokeJoinpoint(Cglib2AopProxy.java:692) 
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) 
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:107) 
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) 
org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:625) 
fi.utu.aineistopankki.database.JdbcDatabaseManager$$EnhancerByCGLIB$$cdfed3e.insertAddMaterialValues() 
net.viralpatel.spring3.controller.MaterialController.onSubmit(MaterialController.java:46) 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
java.lang.reflect.Method.invoke(Method.java:597) 
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.doInvokeMethod(HandlerMethodInvoker.java:710) 
org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:167) 
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:414) 
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:402) 
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:771) 
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716) 
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:647) 
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:563) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:637) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

这是什么，如何解决？

来源

2010-09-30 JII

您应该使用PreparedStatementCreatorFactory中的setGeneratedKeysColumnNames方法来指定在表中用作键的列的名称。

来源

2010-09-30 11:19:04 hhbarriuso

我自己遇到并解决了这个问题。我会建议重构你准备好的陈述的方法。这里是你需要做的：创建一个实现org.springframework.jdbc.core.PreparedStatementCreator的类。这个类将处理如何将数据提供给准备好的语句。以下是一个示例

private class MaterialPreparedStatementCreator implements PreparedStatementCreator { 
    private MaterialBean material; 

    public MaterialPreparedStatementCreator (MaterialBean material){ 
     this.material = material; 
    } 

    public PreparedStatement createPreparedStatement(Connection connection) throws SQLException { 
     PreparedStatement ps = connection.prepareStatement(storeQuery, new String [] {"id"}); 
     ps.setString(1, material.getName()); 
        /* add in the rest of the fields */ 
     return ps; 
    } 

}

注意对connection.prepareStatement的调用。第二个参数指定您想要由GeneratedKeyHolder使用哪一列。

使用您的PreparedStatementCreator。例如：

public void createMaterial(MaterialBean material) { 
    KeyHolder generatedKeyHolder = new GeneratedKeyHolder(); 
    this.getJdbcTemplate().update(new MaterialPreparedStatementCreator(material), generatedKeyHolder); 
    material(generatedKeyHolder.getKey().longValue()); 
}

来源

2010-10-12 00:16:48

使用getKeys（）方法而不是getKey（），显然你有多个指定的键。

特别是，由于错误告诉你：getKey（）将会是Retrieve the first item from the first map, assuming that there is just one item and just one map, and that the item is a number.。

来源

2010-10-12 00:21:40

多键插入尝试方法

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