困扰已久的问题：Jboss Seam :Seam Generate Entites

Question

我用Seam Generate Entites 生成实体，随之生成类：
package org.domain.tmsoaseam.session;import org.domain.tmsoaseam.entity.*;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.framework.EntityQuery;
import java.util.Arrays;@Name("tUserList")
public class TUserList extends EntityQuery<TUser> { private static final String EJBQL = "select tUser from TUser tUser"; private static final String[] RESTRICTIONS = {
"lower(tUser.suser) like lower(concat(#{tUserList.tUser.suser},'%'))",
"lower(tUser.spwd) like lower(concat(#{tUserList.tUser.spwd},'%'))",
"lower(tUser.sname) like lower(concat(#{tUserList.tUser.sname},'%'))",
"lower(tUser.sex) like lower(concat(#{tUserList.tUser.sex},'%'))",
"lower(tUser.ismarry) like lower(concat(#{tUserList.tUser.ismarry},'%'))",
"lower(tUser.identitycard) like lower(concat(#{tUserList.tUser.identitycard},'%'))",
"lower(tUser.telephone) like lower(concat(#{tUserList.tUser.telephone},'%'))",
"lower(tUser.email) like lower(concat(#{tUserList.tUser.email},'%'))",
"lower(tUser.mobilephone) like lower(concat(#{tUserList.tUser.mobilephone},'%'))",
"lower(tUser.address) like lower(concat(#{tUserList.tUser.address},'%'))", }; private TUser tUser = new TUser(); public TUserList() {
setEjbql(EJBQL);
setRestrictionExpressionStrings(Arrays.asList(RESTRICTIONS));
setMaxResults(25);
} public TUser getTUser() {
return tUser;
}}访问：http://localhost:8099/TmsOASeam/TUserList.seam列表时报异常：14:34:37,929 INFO  [Authenticator] authenticating admin
14:34:41,493 SEVERE [viewhandler] Error Rendering View[/TUserList.xhtml]
javax.faces.FacesException: javax.el.PropertyNotFoundException: /TUserList.xhtml @19,75 value="#{tUserList.tUser.suser}": Property 'tUser' not found on type org.domain.tmsoaseam.session.TUserList_$$_javassist_seam_3
at javax.faces.component.UIOutput.getValue(UIOutput.java:187)
at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:201)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:284)
at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:154)
at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:861)
at org.jboss.seam.ui.util.cdk.RendererBase.renderChild(RendererBase.java:190)
at org.jboss.seam.ui.util.cdk.RendererBase.renderChildren(RendererBase.java:166)
at org.jboss.seam.ui.renderkit.DecorateRendererBase.doEncodeChildren(DecorateRendererBase.java:152)
at org.jboss.seam.ui.util.cdk.RendererBase.encodeChildren(RendererBase.java:92)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:277)
at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:258)
at org.richfaces.renderkit.html.SimpleToggleControlTemplate.doEncodeChildren(SimpleToggleControlTemplate.java:347)
at org.richfaces.renderkit.html.SimpleToggleControlTemplate.doEncodeChildren(SimpleToggleControlTemplate.java:342)
at org.ajax4jsf.renderkit.RendererBase.encodeChildren(RendererBase.java:120)
at org.richfaces.renderkit.html.SimpleTogglePanelRenderer.encodeChildren(SimpleTogglePanelRenderer.java:186)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:930)
at javax.faces.render.Renderer.encodeChildren(Renderer.java:148)
at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:930)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:933)
at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:110)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)
at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)
Caused by: javax.el.PropertyNotFoundException: /TUserList.xhtml @19,75 value="#{tUserList.tUser.suser}": Property 'tUser' not found on type org.domain.tmsoaseam.session.TUserList_$$_javassist_seam_3
at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:73)
at javax.faces.component.UIOutput.getValue(UIOutput.java:184)
... 71 more
什么原因呢？我们是否需要更改其自动生成的类TUserList，还是我哪里有问题？？希望各位指点指点，谢谢！

Answer 1

 可能是我的表名用T_user的缘故，现在我换了个表SeamUser：
package org.domain.tmsoaseam.entity;// Generated 2011-2-16 15:30:44 by Hibernate Tools 3.4.0.CR1import java.math.BigDecimal;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
import org.hibernate.validator.Length;
import org.hibernate.validator.NotNull;/**
 * Seamuser generated by hbm2java
 */
@Entity
@Table(name = "SEAMUSER", schema = "OA_TUMUSHUI")
public class Seamuser implements java.io.Serializable { private BigDecimal userid;
private String username;
private String password; public Seamuser() {
} public Seamuser(BigDecimal userid) {
this.userid = userid;
} public Seamuser(BigDecimal userid, String username, String password) {
this.userid = userid;
this.username = username;
this.password = password;
} @Id
@Column(name = "USERID", unique = true, nullable = false, precision = 22, scale = 0)
@NotNull
public BigDecimal getUserid() {
return this.userid;
} public void setUserid(BigDecimal userid) {
this.userid = userid;
} @Column(name = "USERNAME", length = 20)
@Length(max = 20)
public String getUsername() {
return this.username;
} public void setUsername(String username) {
this.username = username;
} @Column(name = "PASSWORD", length = 20)
@Length(max = 20)
public String getPassword() {
return this.password;
} public void setPassword(String password) {
this.password = password;
}}
随之生成的类：
package org.domain.tmsoaseam.session;import org.domain.tmsoaseam.entity.*;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.framework.EntityQuery;
import java.util.Arrays;@Name("seamuserList")
public class SeamuserList extends EntityQuery<Seamuser> { private static final String EJBQL = "select a from Seamuser a"; private static final String[] RESTRICTIONS = {
"lower(seamuser.username) like lower(concat(#{seamuserList.seamuser.username},'%'))",
"lower(seamuser.password) like lower(concat(#{seamuserList.seamuser.password},'%'))", }; private Seamuser seamuser = new Seamuser(); public SeamuserList() {
setEjbql(EJBQL);
setRestrictionExpressionStrings(Arrays.asList(RESTRICTIONS));
setMaxResults(25);
} public Seamuser getSeamuser() {
return seamuser;
}
}
这下报映射不到：
javax.el.ELException: /SeamuserList.xhtml: Error reading 'resultList' on type org.domain.tmsoaseam.session.SeamuserList_$$_javassist_seam_2
at com.sun.facelets.compiler.TextInstruction.write(TextInstruction.java:48)
at com.sun.facelets.compiler.UIInstructions.encodeBegin(UIInstructions.java:39)
at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:275)
at org.richfaces.renderkit.html.PanelRenderer.doEncodeBegin(PanelRenderer.java:189)
at org.richfaces.renderkit.html.PanelRenderer.doEncodeBegin(PanelRenderer.java:148)
at org.ajax4jsf.renderkit.RendererBase.encodeBegin(RendererBase.java:100)
at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:813)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:928)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:933)
at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:110)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)
at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:60)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.IllegalArgumentException: org.hibernate.hql.ast.QuerySyntaxException: Seamuser is not mapped [select a from Seamuser a]
at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:601)
at org.hibernate.ejb.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:96)
......
at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185)
at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103)
at org.domain.tmsoaseam.session.SeamuserList_$$_javassist_seam_2.getResultList(SeamuserList_$$_javassist_seam_2.java)
... 58 more
Caused by: org.hibernate.hql.ast.QuerySyntaxException: Seamuser is not mapped [select a from Seamuser a]
at org.hibernate.hql.ast.util.SessionFactoryHelper.requireClassPersister(SessionFactoryHelper.java:181)
at org.hibernate.hql.ast.tree.FromElementFactory.addFromElement(FromElementFactory.java:110)
at org.hibernate.hql.ast.tree.FromClause.addFromElement(FromClause.java:93)
at org.hibernate.hql.ast.HqlSqlWalker.createFromElement(HqlSqlWalker.java:277)
va:94)
at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:156)
at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:135)
at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1650)
at org.hibernate.ejb.AbstractEntityManagerImpl.createQuery(AbstractEntityManagerImpl.java:93)
... 96 more希望哪位朋友给予解答，谢谢！

Answer 2

原因很简单，根据 JavaBeans 规范，通过 get 方法 public TUser getTUser() 找到的属性是 TUser，因此会报属性找不到，你要在 Seam 的 xhtml 中使用 #{tUserList.TUser.suser} 这样才可以。根据 JavaBeans 规范，属性的前两个字母要么全部大写，要么全部小写，像你这种 #{tUserList.tUser.suser} 中的 tUser 是不允许的！建议将 get 方法改为 public TUser getTuser(), set 方法也做同样的改动。

Answer 3

像 Seam Generate Entities，以及 Eclipse 自动生成的代码都是简单地使用字符串处理做出来的，并没有按照 JavaBeans 规范来实现，但是所有的开源框架都是按照 JavaBeans 规范来编写的。需要说明一下，字段与属性是有区别的。字段指的是类中的成员变量，而属性是通过 get/set 方法名演变出来的。像 EL 中的立即求值表达式 ${} 和仅能用于 JSF 中的延迟求值表达式 #{} 中的东西都是属性，而非字段。

Answer 4

private static final String EJBQL = "select a from Seamuser a";private static final String[] RESTRICTIONS = {
"lower(seamuser.username) like lower(concat(#{seamuserList.seamuser.username},'%'))",
"lower(seamuser.password) like lower(concat(#{seamuserList.seamuser.password},'%'))", };你自己看一下吧，表的别名是 a，而你在这里用的是 seamuser，你说能不出错么？PS：把 lower 函数去掉，否则在执行时很影响 SQL 性能的。

Answer 5

看了一下你历史的发帖，还是个很大方的人，帖子分数都挺多的，呵呵。不过你好像没分了，给你送上 1000 分的可用分，以示支持你学习 JBoss Seam。PS：CSDN 要扣 10% 的税，因此你能收到 900 分。分数已送出，请查收。

Answer 6

1.修改 /META-INF/persistence.xml，添加如下一行属性
 
<property name="jboss.entity.manager.factory.jndi.name" value="java:/projectEntityManagerFactory"/>
 
2.修改 /WEB-INF/components.xml，将如下配置属性
 
<persistence:entity-manager-factory name="projectEntityManagerFactory" persistence-unit-name="project"/>
 
   <persistence:managed-persistence-context name="entityManager" auto-create="true"
                          entity-manager-factory="#{projectEntityManagerFactory}"/>
 
修改为：
 
   <persistence:managed-persistence-context name="entityManager" auto-create="true" 
      entity-manager-factory="#{projectEntityManagerFactory}"
      persistence-unit-jndi-name="java:/projectEntityManagerFactory"/>
 
问题解决了！

Answer 7

非常感谢！
呵呵，问题困扰着我，没法就行下一步..急啊..
对于你刚刚提到的问题，表名不要X_XXX命名，如T_User就可以避免了
一个个改那就降低了jboss seam的优点了了

Answer 8

private static final String EJBQL = "select a from Seamuser a"; 我只是测试用的，，没有还原回去您提到的命名规范问题再次引起我的高度重视，再次感谢！

Answer 9

EAR 工程一创建就有 4 个关联的工程，调试起来比较麻烦，习惯了就好，呵呵。