hibernate annotion多对多关系示例

实体之间是多对多的关系，如图：


错误的实体代码如下

JAVA 代码:

@ManyToMany(cascade = CascadeType.PERSIST, fetch = FetchType.EAGER)
   @JoinTable(name = "product_packagetype:packageTypes:products")
   private java.util.Listimplambition.forxxx.model.PackageType> packageTypes;
   /** 
    * @generated 
    */
   @ManyToMany(cascade = CascadeType.PERSIST, fetch = FetchType.EAGER)
   @JoinTable(name = "product_productcolor:productColors:products")
   private java.util.Listimplambition.forxxx.model.ProductColor> productColors;
   /** 
    * @generated 
    */
   @ManyToMany(cascade = CascadeType.PERSIST, fetch = FetchType.EAGER)
   @JoinTable(name = "product_attach:attachs:products")
   private java.util.Listimplambition.forxxx.model.Attach> attachs;
 
 

这样的代码本身不能正常运行，报错 cannot simultaneously fetch multiple bags。
改成FetchType.LAZY后，报错 WARN [main] 2009-05-10 16:46:18,655 - SQL Error: 1064, SQLState: 42000
ERROR [main] 2009-05-10 16:46:18,655 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ':packageTypes:products packagetyp0_ left outer join PackageType packagetyp1_ on ' at line 1



最后只能修改为：
Product实体

JAVA 代码:

/** 
    * @generated 
    */
   @ManyToMany(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
   //@JoinTable(name = "product_packagetype:packageTypes:products")
   @JoinTable(name = "product_packagetype", joinColumns = { @JoinColumn(name = "packageTypes") }, inverseJoinColumns = { @JoinColumn(name = "products") }) 
   private java.util.Listimplambition.forxxx.model.PackageType> packageTypes;
   /** 
    * @generated 
    */
   @ManyToMany(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
   //@JoinTable(name = "product_productcolor:productColors:products")
   @JoinTable(name = "product_productcolor", joinColumns = { @JoinColumn(name = "productColors") }, inverseJoinColumns = { @JoinColumn(name = "products") })
   private java.util.Listimplambition.forxxx.model.ProductColor> productColors;
   /** 
    * @generated 
    */
   @ManyToMany(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
   //@JoinTable(name = "product_attach:attachs:products")
   @JoinTable(name = "product_attach", joinColumns = { @JoinColumn(name = "attachs") }, inverseJoinColumns = { @JoinColumn(name = "products") })
   private java.util.Listimplambition.forxxx.model.Attach> attachs;

其他关联实体只列出一个示例，代码如下（注释掉的为studio生成的代码）

JAVA 代码:

/** 
    * @generated 
    */
   //@ManyToMany(cascade = CascadeType.PERSIST, fetch = FetchType.EAGER)
   @ManyToMany(cascade = {CascadeType.PERSIST, CascadeType.MERGE }, fetch = FetchType.LAZY, mappedBy="attachs")
   private java.util.Listimplambition.forxxx.model.Product> products;

apusic operamasks使用了 w：foreach 迁移到tomcat的问题

aom使用了 w：foreach 迁移到tomcat的问题

如果部署到tomcat的aom应用中使用了 w：foreach，只包含
elite.jar
jsf-api.jar
operamasks-impl.jar
operamasks-options.jar
operamasks-third-party.jar
在一些特殊情况下（w：foreach 绑定的不是一个list对象）是不能运行的，需要加上jstl.jar

uidata.java 方法getDataModel会调用到jstl.jar

复制内容到剪贴板

JAVA 代码:

protected DataModel getDataModel() {
 
   // Return any previously cached DataModel instance
   if (this.model != null) {
    return (model);
   }
 
   // Synthesize a DataModel around our current value if possible
   Object current = getValue();
   if (current == null) {
    setDataModel(new ListDataModel(Collections.EMPTY_LIST));
   } else if (current instanceof DataModel) {
    setDataModel((DataModel) current);
   } else if (current instanceof List) {
    setDataModel(new ListDataModel((List) current));
   } else if (Object[].class.isAssignableFrom(current.getClass())) {
    setDataModel(new ArrayDataModel((Object[]) current));
   } else if (current instanceof ResultSet) {
    setDataModel(new ResultSetDataModel((ResultSet) current));
   } else if (current instanceof Result) {
    setDataModel(new ResultDataModel((Result) current));
   } else {
    setDataModel(new ScalarDataModel(current));
   }
   return (model);
 
  }

JSF 中关于 immediate 属性

对JSF了解的人都知道，JSF的六大生命周期，默认情况下六大生命周期各自的处理逻辑比较合理，但是在现在web交互的模式下（AJAX方式）就会经常出现需要跳过某些生命周期的情况。最常见的就是跳过有效性验证的阶段，JSF使用immediate 属性设为true达到该目的。
具体的处理方式参见以下两图的比对。











我们内部使用Apusic的AOM实现，对于该属性的支持，有一点小小的问题。
aom 的ajax:action使用IOVC绑定相应后台action方法后，即使设置immediate="true"也不会跳过processValidators生命周期，晕呀

517fan项目开源

项目517fan开源了，其实也就是找个地方存储自己的代码，呵呵，一个商业应用，还没完成，玩玩。基于aom 和 ejb3开发。
项目地址：http://code.google.com/p/517fan/

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