Using ormlite in Android for persistence (2)-detailed configuration of persistence classes

PreviousArticleOrmlite is simple to use, but I think ormlite is superior to the configuration design for fields, tables, and so on.

The following describes the class Configuration:

If the Android app we developed needs to retain user information, create a new class: useraccount

This class has six variables:

 
Private IntID;
PrivateString username;
PrivateString password;
PrivateDate regtime;
PrivateString tellphone;
PrivateString email;
 

Use eclipse to generate get and set methods:

 Public   Int GETID (){
 Return ID;
}

 Public   Void Setid ( Int ID ){
 This . ID = ID;
}

 Public String GetUserName (){
 Return Username;
}

 Public   Void Setusername (string username ){
 This . Username = username;
}

 Public String GetPassword (){
 Return Password;
}

 Public   Void Setpassword (string password ){
 This . Password = password;
}

 Public Date getregtime (){
 Return Regtime;
}

Public   Void Setregtime (date regtime ){
 This . Regtime = regtime;
}

 Public String gettellphone (){
 Return Tellphone;
}

 Public   Void Settellphone (string tellphone ){
 This . Tellphone = tellphone;
}

Public String getemail (){
 Return Email;
}

 Public   Void Setemail (string email ){
 This . Email = Email;
}

The persistence parameters of the class are configured as follows:

1. Table Name:

 
@ Databasetable (tablename = "datatablename ")
 

If this parameter is not specified, the table name is the class name.

2. Fields

 
@ Databasefield
 

This can be configured with a lot of attributes.

2.1 primary key

 
@ Databasefield (ID = true)
 

2.2 column name

@ Databasefield (columnname = "columnname ")
 

If this parameter is not specified, it is the same as the variable name.

2.3 Data Type

 
@ Databasefield (datatype = datatype. integer)
 

In general, you do not need to specify this parameter. You can obtain this parameter based on the Java class.

2.4 Default Value

 
@ Databasefield (defaultvalue = "0 ")
 

2.5 Length

 
@ Databasefield (width = 13)
 

It is generally used for string type

2.6 empty

 
@ Databasefield (canbenull = false)
 

The default value is true.

2.7 self-growth?

 
@ Databasefield (generatedid = true)
 

This is relatively simple. Let's talk about the foreign key in the next article.