Question

如何使用MyBatis获取插入的生成密钥？我读了很多关于这个问题的网页，但我仍然被封锁，有人可以帮帮我吗？这是我的代码：

表格：

ID_ERROR long primary key
DATE timestamp
TYPE varchar
MESSAGE varchar
SOURCE varchar

道：

Long returnedId = 0L;
MyMapper myMapper = this.sqlSession.getMapper(MyMapper.class);
myMapper.insertRecord(returnedId, Utils.now(), t.getClass().getName(), t.getMessage(), c.getName());
return returnedId;

mapper.java：

public void insertRecord(@Param("returnedId") Long returnedId, @Param("timestamp")Timestamp timestamp,@Param("type") String type,@Param("message") String message,@Param("source") String source);

mapper.xml

 <insert id="insertRecord" parameterType="map" useGeneratedKeys="true"  keyProperty="ID_ERROR">
    INSERT INTO errors (
        DATE,
        TYPE,
        MESSAGE,
        SOURCE
    )
    VALUES (
        #{timestamp},
        #{type},
        #{message},
        #{source}
    )
    <selectKey resultType="long" order="AFTER" keyProperty="returnedId">
        SELECT LAST_INSERT_ID() as returnedId
    </selectKey>
</insert>

有什么问题？如何获取此插入的生成密钥？谢谢！

Answer 1

对我而言，它的工作方式如下（mybatis 3.x）.. 必须在mysql表中设置id自动增量

<insert id="createEmpty" parameterType="Project" useGeneratedKeys="true" keyProperty="project.projectId" keyColumn="PROJECT_ID">
    INSERT INTO PROJECT (TITLE,DESCRIPTION)
    VALUES
    (#{title},#{description})
</insert>

NOTE keyProperty="project.projectId"和useGeneratedKeys="true"

我的界面是：

public int createEmpty(@Param("project") Project project, @Param("title") String title,
    @Param("description") String description);

最终获取值（将自动分配给pojo的id属性）我使用：

projectRepository.createEmpty(p, "one", "two");
System.err.print(p.getProjectId() + "\n");

Answer 2

您可以通过两种方式实现这一目标，

使用useGeneratedKeys="true", keyProperty="id", keyColumn="id"

keyProperty引用POJO变量名称，keyColumn引用数据库中生成的列名称
在插入标记

<selectKey/>

Answer 3

简易解决方案：

将HTTP Status 500 - ServletException including path '/Pages/Layout/baseLayout.jsp'. type Exception report message ServletException including path '/Pages/Layout/baseLayout.jsp'. description The server encountered an internal error that prevented it from fulfilling this request. exception org.apache.tiles.TilesException: ServletException including path '/Pages/Layout/baseLayout.jsp'. org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:614) org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:246) org.apache.struts2.views.tiles.TilesResult.doExecute(TilesResult.java:105) org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186) com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:362) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:266) com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:165) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252) org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.obs.util.IsValidUserInterceptor.intercept(IsValidUserInterceptor.java:15) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.obs.util.IsValidUserCustomerInterceptor.intercept(IsValidUserCustomerInterceptor.java:15) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488) org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91) root cause org.apache.tiles.util.TilesIOException: ServletException including path '/Pages/Layout/baseLayout.jsp'. org.apache.tiles.servlet.context.ServletTilesRequestContext.wrapServletException(ServletTilesRequestContext.java:298) org.apache.tiles.servlet.context.ServletTilesRequestContext.forward(ServletTilesRequestContext.java:200) org.apache.tiles.servlet.context.ServletTilesRequestContext.dispatch(ServletTilesRequestContext.java:179) org.apache.tiles.context.TilesRequestContextWrapper.dispatch(TilesRequestContextWrapper.java:72) org.apache.struts2.tiles.StrutsTilesRequestContext.dispatch(StrutsTilesRequestContext.java:88) org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:606) org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:246) org.apache.struts2.views.tiles.TilesResult.doExecute(TilesResult.java:105) org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186) com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:362) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:266) com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:165) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252) org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.obs.util.IsValidUserInterceptor.intercept(IsValidUserInterceptor.java:15) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.obs.util.IsValidUserCustomerInterceptor.intercept(IsValidUserCustomerInterceptor.java:15) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488) org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91) root cause javax.servlet.ServletException: javax.servlet.jsp.JspException: IO Error executing tag: JSPException including path '/Pages/Customer/foreignTransfer.jsp'. org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:912) org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:845) org.apache.jsp.Pages.Layout.baseLayout_jsp._jspService(baseLayout_jsp.java:442) com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.StaticParametersInterceptor.intercept(StaticParametersInterceptor.java:179) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.MultiselectInterceptor.intercept(MultiselectInterceptor.java:75) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.CheckboxInterceptor.intercept(CheckboxInterceptor.java:94) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:235) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ModelDrivenInterceptor.intercept(ModelDrivenInterceptor.java:89) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ScopedModelDrivenInterceptor.intercept(ScopedModelDrivenInterceptor.java:130) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.debugging.DebuggingInterceptor.intercept(DebuggingInterceptor.java:267) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.obs.util.IsValidUserInterceptor.intercept(IsValidUserInterceptor.java:15) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.obs.util.IsValidUserCustomerInterceptor.intercept(IsValidUserCustomerInterceptor.java:15) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488) org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91) root cause org.apache.tiles.util.TilesIOException: JSPException including path '/Pages/Customer/foreignTransfer.jsp'. org.apache.tiles.servlet.context.ServletTilesRequestContext.wrapServletException(ServletTilesRequestContext.java:300) org.apache.tiles.jsp.context.JspTilesRequestContext.include(JspTilesRequestContext.java:82) org.apache.tiles.jsp.context.JspTilesRequestContext.dispatch(JspTilesRequestContext.java:73) org.apache.tiles.context.TilesRequestContextWrapper.dispatch(TilesRequestContextWrapper.java:72) org.apache.struts2.tiles.StrutsTilesRequestContext.dispatch(StrutsTilesRequestContext.java:88) org.apache.tiles.impl.BasicTilesContainer.render(BasicTilesContainer.java:283) org.apache.tiles.jsp.taglib.InsertAttributeTag.render(InsertAttributeTag.java:140) org.apache.tiles.jsp.taglib.InsertAttributeTag.render(InsertAttributeTag.java:117) org.apache.tiles.jsp.taglib.RenderTagSupport.execute(RenderTagSupport.java:1 com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ChainingInterceptor.intercept(ChainingInterceptor.java:126) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.PrepareInterceptor.doIntercept(PrepareInterceptor.java:138) com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:165) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.interceptor.ServletConfigInterceptor.intercept(ServletConfigInterceptor.java:164) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.AliasInterceptor.intercept(AliasInterceptor.java:179) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.opensymphony.xwork2.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:176) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.obs.util.IsValidUserInterceptor.intercept(IsValidUserInterceptor.java:15) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) com.obs.util.IsValidUserCustomerInterceptor.intercept(IsValidUserCustomerInterceptor.java:15) com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:52) org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:488) org.apache.struts2.dispatcher.ng.ExecuteOperations.executeAction(ExecuteOperations.java:77) org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.doFilter(StrutsPrepareAndExecuteFilter.java:91) root cause org.apache.jasper.JasperException: /Pages/Customer/foreignTransfer.jsp (line: 347, column: 92) Attribute qualified names must be unique within an element org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:42) org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:443) org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:89)属性用作<form action="/HamburgerProject/stuSubmitAdmissionForm.html" method="post"> <table> <tr> <td>Student's Name :</td> <td>${student.studentName}</td> </tr> <tr> <td>Student's Age :</td> <td>${student.studentAge}</td> </tr> </table> <input type="hidden" name="studentName" value="${student.studentName}"> <input type="hidden" name="studentAge" value="${student.studentAge}"> <input type="submit" value="send"/> </form> 如下......

KeyProperty

Answer 4

在xml文件中，在5行以下放置：

<insert id="createPet" parameterType="java.util.Map"
    useGeneratedKeys="true" keyProperty="id">
    INSERT INTO Pet (NAME, OWNER, SPECIES, SEX, BIRTH)
    VALUES (#{name}, #{owner}, #{species}, #{sex}, #{birth})
</insert>

在Java主类中创建此方法，然后在main方法中调用它：

public int createPet(PetDVO petDVO) throws Exception {
    HashMap<String, Object> inputMap = new HashMap<String, Object>();
    inputMap.put("name", petDVO.getName());
    inputMap.put("owner", petDVO.getOwner());
    inputMap.put("species", petDVO.getSpecies());
    inputMap.put("sex", petDVO.getSex());
    inputMap.put("birth", petDVO.getBirth());

    /**
     * Get the sql session and commit the data
     */
    SqlSession sqlSession = getSqlSession();
    sqlSession.insert("createPet", inputMap);
    sqlSession.commit();

    BigInteger newID = (BigInteger)inputMap.get("id");
    return newID.intValue();
}

但是您应该自己创建PetDVO类。就是这样。

Answer 5

在Mapper Xml下，使用查询：

    <insert id="saveDemo" parameterType="com.abc.demo"
       useGeneratedKeys="true" keyProperty="demoId" keyColumn="DEMOID">
       INSERT INTO TBL_DEMO (DEMONAME,DEMODESCRIPTION)
       VALUE (#{demoName},#{demoDescription})
       <selectKey keyProperty="demoId" resultType="int" order="AFTER">
        SELECT LAST_INSERT_ID();
       </selectKey>
    </insert>

Java Side

@Override
public boolean saveDemo(Demo demo) {
    boolean status = false;
    SqlSession session = this.sqlSessionFactory.openSession();
    try {
        DemoMapper mapper = session.getMapper(DemoMapper.class);
        mapper.saveDemo(demo);
        session.commit();
        status = true;
    } catch(PersistenceException e) {
        System.out.println(e);
    } finally {
        session.close();
    }
    return status;
}

Answer 6

请按照以下步骤操作：

创建ID为属性的错误POJO
将returnId替换为错误，如下所示，

public void insertRecord（@Param（“error”）错误错误， @Param（“timestamp”）时间戳时间戳，@ Param（“type”）字符串 type，@ Param（“message”）字符串消息，@ Param（“source”）字符串源）;

将keyProperty =“ID_ERROR”更改为keyProperty =“error.id”

删除

<selectKey resultType="long" order="AFTER" keyProperty="returnedId">
    SELECT LAST_INSERT_ID() as returnedId
</selectKey>

您将在id

error.id

Answer 7

如果要获取生成的主键，则应通过Map或POJO Object

传递参数

public void insertRecord(Map<String, Object> map);

调用映射方法时，将值放到map。

Map<String, Object> map = new HashMap<String, Object>();
map.put("returnedId", 0);
map.put("message", message);
// other paramters
mapper.insertRecord(map);
return map.get("returnedId");

MyBatis，如何获取插入的自动生成密钥？ [MySQL的]

7 个答案: