Spring MVC验证器
测试结果工程结构工程目录添加商品页addgoods.jsp控制器goodsController验证器GoodsValidator错误提示属性文件errorMessages
测试结果
工程结构
工程目录
添加商品页addgoods.jsp
<%@ page language
="java" contentType
="text/html; charset=UTF-8"
pageEncoding
="UTF-8"%>
<%@taglib prefix
="form" uri
="http://www.springframework.org/tags/form"%>
<!DOCTYPE html PUBLIC
"-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html
>
<head
>
<meta http
-equiv
="Content-Type" content
="text/html; charset=UTF-8">
<title
>添加商品
</title
>
</head
>
<body
>
<form
:form modelAttribute
="goods" action
="/goods/save" method
="post">
<fieldset
>
<legend
> 添加一件商品
</legend
>
<P
>
<label
>商品名
:</label
>
<form
:input path
="gname" />
</p
>
<p
>
<label
>商品详情
:</label
>
<form
:input path
="gdescription" />
</p
>
<P
>
<label
>商品价格
:</label
>
<form
:input path
="gprice" />
</p
>
<P
>
<label
>创建日期
:</label
>
<form
:input path
="gdate" />
(yyyy
-MM
-dd
)
</p
>
<p id
="buttons">
<input id
="reset" type
="reset">
<input id
="submit" type
="submit" value
="添加">
</p
>
</fieldset
>
<!-- 取出所有验证错误
-->
<form
:errors path
="*" />
</form
:form
>
</body
>
</html
>
控制器goodsController
package control
;
import org
.springframework
.beans
.factory
.annotation
.Autowired
;
import org
.springframework
.stereotype
.Controller
;
import org
.springframework
.ui
.Model
;
import org
.springframework
.validation
.BindingResult
;
import org
.springframework
.web
.bind
.annotation
.ModelAttribute
;
import org
.springframework
.web
.bind
.annotation
.RequestMapping
;
import pojo
.Goods
;
import service
.GoodsServiceImpl
;
import validator
.GoodsValidator
;
@Controller
@
RequestMapping("/goods")
public class GoodsController {
@Autowired
private GoodsServiceImpl goodsService
;
GoodsValidator validator
= new GoodsValidator();
@
RequestMapping("/input")
public String
input(Model model
) {
model
.addAttribute("goods", new Goods());
return "addgoods";
}
@
RequestMapping("/save")
public String
save(@ModelAttribute Goods goods
, BindingResult result
, Model model
) {
this.validator
.validate(goods
, result
);
if (result
.hasErrors()) {
return "addgoods";
}
goodsService
.save(goods
);
model
.addAttribute("goodsList", goodsService
.getGoods());
return "showgoods";
}
}
验证器GoodsValidator
package validator
;
import org
.springframework
.stereotype
.Component
;
import org
.springframework
.validation
.Errors
;
import org
.springframework
.validation
.ValidationUtils
;
import org
.springframework
.validation
.Validator
;
import pojo
.Goods
;
import java
.util
.Date
;
@Component
public class GoodsValidator implements Validator
{
@Override
public boolean
supports(Class
<?> clazz
) {
return Goods
.class.isAssignableFrom(clazz
);
}
@Override
public void validate(Object target
, Errors errors
) {
Goods goods
= (Goods
)target
;
ValidationUtils
.rejectIfEmpty(errors
,"gname","goods.gname.required");
ValidationUtils
.rejectIfEmpty(errors
,"gdescription","goods.gdescription.required");
if(goods
.getGprice()>100 || goods
.getGprice()<0){
errors
.rejectValue("gprice","gprice.invalid");
}
Date goodsDate
= goods
.getGdate();
if(goodsDate
!= null
&& goodsDate
.after(new Date())){
errors
.rejectValue("gdate","gdate.invalid");
}
}
}
错误提示属性文件errorMessages
goods
.gname
.required
=no name
goods
.gdescription
.required
=no description
gprice
.invalid
=over
0~100
gdate
.invalid
=date invalid
