SPRINGMVC Data validation

1. Introduction of the JAR package

Com.springsource.javax.validation-1.0.0.ga.jar specification (just definition)

Hibernate-validator-4.1.0.final.jar Vendor Implementation

Log4j.jar

Slf4j-api-1.5.8.jar

Slf4j-log4j12.jar

2. Validation feature to add validation annotations on entity classes

1 Person.java 2 @Size (min=3,max=10,message= "user name must be greater than 3 characters, less than 10 characters") 3 private String name; 4 @NotNull (message= "Age cannot be empty") 5 private Integer; 6 personupdate.jsp 7  8 name: <sf:input path= "name"/> 9 <font color= "Red" ><sf:errors path= "name"/> </font>10 personcontroller.java12 public String saveorupdate (@Valid person p, Bindingresult br,13         @ Requestparam ("photo") Multipartfile file,14         httpservletrequest request, HttpServletResponse repsonse) {     if (Br.haserrors ()) {         return "person/jpersonupdate";  Error returned page display error     

Verify error message Echo

<sf:errors path= "*"/>

Show All Errors

Attention:

Form property modelattribute= "Person"

Otherwise, you will not be able to display error messages

SPRINGMVC Data validation