Add an attribute called id of type Key (see the import list for the fully qualified class name).
添加一个类型为Key的id属性(见于完全合格类名的导入列表)。
An Entity class needs a primary key.
Entity类需要一个主键。
You can also create a primary key class for entities that have composite keys.
还可以为具有组合键的实体创建一个主键类。
Using the core Security class, an authentication key is generated and written to the session.
通过使用核心Security类，生成认证密钥并将其写入会话。
When you create the map, you must pass in the class for the enumerated key.
在创建映射时，必须为枚举的键传入这个类。
The JAXP SAXParserFactory class is the key to being able to change parser implementations easily.
JAXPSAXParserFactory类是能够轻易更改解析器实现的关键。
Next up in Listing 2 is the @IdClass annotation, which defines the composite key class reference.
清单2中的下一个注释是 @IdClass，它定义组合键类引用。
In this case, the class name is implicitly used as a key.
在这一情况中，类名隐式地用作一个键。
The authentication key is set as a class variable in your controller.
认证密钥在控制器中被设为类变量。
This is yet another class that supports sorted collection of objects where each sort key must be unique.
这是另外一个可以支持排序的对象集合的类，其中每个排序键必须是唯一的。
The find method requires you to know the primary key as well as the actual class type.
find方法要求您知道主键和实际类的类型。
The key reason why we decided to have a utility class for data access was to ensure that the same classes could be used to connect to any type of Domino database.
决定实现一个实用程序类来进行数据访问的关键原因是，希望确保可以使用相同的类来连接任何类型的Domino数据库。
The <many-to-many> tag's column attribute specifies the foreign key column in the link table that relates the link table to the mapping table for the target class.
<many-to-many>标签中的column属性用来指定连接表与目标类的映射表链接的外键。
The key manager can be a helper class.
键管理器可以是一个助手类。
To convert an existing column into a primary key, click on the column (property in the class) in the diagram.
要转换一个已有的列成为一个主键，在图中点击这个列(类中的属性)。
The constructor of the class extracts the JNDI name and the unique key, and then checks the Distributed Map for the data.
这个类的构造函数提取JNDI名和唯一密钥，并检查分布式映射缓存中的数据。
The key to Joda's internals — and at the heart of its design — is the chronology (the notion of which is captured by an abstract class of the same name).
Joda 本质 —以及其设计核心 —的关键就是年表（它的含义由一个同名抽象类捕捉）。
The key to the dependency-injection approach is that you query data by injecting the Class of the entity that the DAO will be querying, along with defining the generic type.
依赖项注入方式的关键是，在查询数据时，要注入DAO将查询的实体的Class并定义泛型类型。
The key class contains the unique primary key implementation for the bean.
该键类包含bean的唯一主键实现。
This table will be used by the key manager class to generate the new key values.
键管理器类将使用该表生成新键值。
The table must match the definition of your attributes; for example, the primary database key for the equations table must be the primary key of the Persistent class as well.
表必需与属性定义匹配，例如，等式表的主数据库键必须也是 Persistent类的主键。
Also, notice how the primary key and foreign key properties represent the relationships on the Deals on Wheels class diagram.
此外，注意主键和外来键属性是怎样表达车辆调度类图的关系的。
Once you generate the key, you can use the AbderaSecurity class to get an Encryption object and feed it the key you just created.
生成密钥之后，便可以使用AbderaSecurity类获得一个Encryption对象并把刚创建的密钥提供给它。
The methods of this class manage (key, value) pairs and multivalue fields.
该类的方法将管理（关键字，值）对和多值字段。
The management of trust stores and key stores is now handled as a first class construct.
信任存储区和密钥存储区的管理现在作为第一类构造进行处理。
Whatever value you specify here can be overridden by an entry in the device's hardware key or class key. If both keys have an override, the hardware key has precedence.
这个值可以被设备的硬件键值或类键值的条目替代，如果这两个键值都被替代了，那么硬件键值将具有更高的优先权。
To find an individual entity by its key, you simply invoke the get method, which takes a class type and the key.
为根据键找到个别实体，您仅需调用get方法，该方法接受一个类类型和键。
The key factor in selecting the testing strategy for the bean implementation class is the fact that the class fully relies on its collaborators to provide its services.
选择bean实现类的测试策略的主要因素是类完全依赖协作者来提供服务。
Normally, to associate that class to another class, you would use a has_one relationship and a simple foreign key.
通常，为了将该类关联到另一个类，可以使用 has_one关系和一个简单的外键。
Your entity class must have matching fields on the class or it can embed the key as an embeddable key
您的实体类必须在类上具有匹配字段，或者它可以作为可嵌入键嵌入该键
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