Custom STRUTS2 type Converters

One, custom type converter

1, write a class, inherit Com.opensymphony.xwork2.conversion.impl.DefaultTypeConverter

2, covering out the public Object convertvalue (map<string, object> context, Object Value,class ToType)

CONTEXT:OGNL The context of an expression

Value: The actual value. The user input is a string, but he is an array of string.

totype: Target type

PUBLIC&NBSP;CLASS&NBSP;DATECONVERTOR&NBSP;EXTENDS&NBSP;DEFAULTTYPECONVERTER&NBSP;{/*&NBSP;CONTEXT:OGNL the context of an expression  value: The values entered by the user (  when data is saved) or properties in the model. The value entered by the user is a String array  totype: The target type  */@Overridepublic  object convertvalue (map<string,  Object> context, object value,class totype)  {    dateformat  df = new simpledateformat ("Yyyy/mm/dd");     if (ToType==Date.class) {         String strValue =  ((string[]) value) [0];     try {        return df.parse (StrValue);          } catch  (parseexception e)  {         throw new runtimeexception (e);         }    }else{        date dvalue =  (Date) value;        return  Df.format (dvalue);         }    }}

3. Register type Converter

3.1 Local type converter: Valid only for the current action

Practice: In the same package as the action class, a configuration file named "Action class name-conversion.properties" is created,

File, add the following: field to verify = Full class name of validator

Birthday=cn.itcast.convertor.dateconvertor

3.2 Global type converter: valid for all action

Practice: Under the Web-inf/classes directory, create a configuration file called "Xwork-conversion.properties",

The following is added to the file: Full name of the target type = Full class name of the validator

Java.util.date=cn.itcast.convertor.dateconvertor

Note: If the conversion fails, the STRUTS2 framework looks for the Name=input results page

Custom STRUTS2 type Converters