Converter in spring: Converter

Source: Internet
Author: User
Tags dateformat

Configure the Spring configuration file:

1 <BeanID= "Conversionservice"2 class= "">3         < Propertyname= "Converters">4             <List>5                 <Beanclass= "App06a.converter.StringToDateConverter">6                     <Constructor-argtype= "Java.lang.String"value= "Mm-dd-yyyy"/>7                 </Bean>8             </List>9         </ Property>Ten     </Bean> One     <Mvc:annotation-drivenConversion-service= "Conversionservice"/>

Once this is configured, you can create a converter loader class to write the implementation of a converter. Here we write a converter that converts a string type to a date type. The date format is after value.

1  Public classStringtodateconverterImplementsConverter<string,date>{2     PrivateString Datepattern;3      PublicStringtodateconverter (String datepattern) {4          This. datepattern=Datepattern;5System.out.println ("instiating" +datepattern);6     }7 @Override8      PublicDate Convert (String s) {9SimpleDateFormat dateformat=NewSimpleDateFormat ();TenDateformat.setlenient (false); One         Try { A             returnDateformat.parse (s); -}Catch(ParseException e) { -             Throw NewIllegalArgumentException ("invailed date" +datepattern+ "\" "); the         } -     } -}

The Converer<s,t> interface is then implemented.

Thus, if the date is entered incorrectly, the previously entered page will be returned, and a prompt will appear on the page:

1@RequestMapping (value= "/employee_input")2      PublicString Inputemployee (model model) {3Model.addattribute ("Employee",NewEmployee ());4         return"Employeeform";5     }6     7@RequestMapping (value= "/employee_save")8      PublicString saveemployee (@ModelAttribute Employee employee,bindingresult Bindresult,model Model) {9         if(Bindresult.haserrors ()) {TenFielderror fielderror=bindresult.getfielderror (); One             return"Employeeform"; A         } -Model.addattribute ("Employee", employee); -         return"Employeedetails"; the}


Converter in spring: Converter

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