spring-Formatter(格式化器)-validator(验证器)-错误信息定制详解编程语言

package app07a.controller; 
 
import org.apache.commons.logging.Log; 
import org.apache.commons.logging.LogFactory; 
import org.springframework.stereotype.Controller; 
import org.springframework.ui.Model; 
import org.springframework.validation.BindingResult; 
import org.springframework.validation.FieldError; 
import org.springframework.web.bind.annotation.ModelAttribute; 
import org.springframework.web.bind.annotation.RequestMapping; 
 
import app07a.domain.Product; 
import app07a.validator.ProductValidator; 
 
@Controller 
public class ProductController { 
 
    private static final Log logger = LogFactory 
            .getLog(ProductController.class); 
 
    @RequestMapping(value = "/product_input") 
    public String inputProduct(Model model) { 
        model.addAttribute("product", new Product()); 
        return "ProductForm"; 
    } 
 
    @RequestMapping(value = "/product_save") 
    public String saveProduct(@ModelAttribute Product product, 
            BindingResult bindingResult, Model model) { 
        logger.info("product_save"); 
        System.out.println("prod save"); 
        ProductValidator productValidator = new ProductValidator(); 
        productValidator.validate(product, bindingResult); 
 
        if (bindingResult.hasErrors()) { 
            FieldError fieldError = bindingResult.getFieldError(); 
            logger.info("Code:" + fieldError.getCode() + ", field:" 
                    + fieldError.getField()); 
 
            return "ProductForm"; 
        } 
 
        // save product here 
 
        model.addAttribute("product", product); 
        return "ProductDetails"; 
    } 
}

package app07a.domain; 
import java.io.Serializable; 
import java.util.Date; 
 
public class Product implements Serializable { 
    private static final long serialVersionUID = 748392348L; 
    private String name; 
    private String description; 
    private Float price; 
    private Date productionDate; 
 
    public String getName() { 
        return name; 
    } 
    public void setName(String name) { 
        this.name = name; 
    } 
    public String getDescription() { 
        return description; 
    } 
    public void setDescription(String description) { 
        this.description = description; 
    } 
    public Float getPrice() { 
        return price; 
    } 
    public void setPrice(Float price) { 
        this.price = price; 
    } 
    public Date getProductionDate() { 
        return productionDate; 
    } 
    public void setProductionDate(Date productionDate) { 
        this.productionDate = productionDate; 
    } 
     
}

package app07a.formatter; 
 
import java.text.ParseException; 
import java.text.SimpleDateFormat; 
import java.util.Date; 
import java.util.Locale; 
 
import org.springframework.format.Formatter; 
 
public class DateFormatter implements Formatter<Date> { 
 
    private String datePattern; 
    private SimpleDateFormat dateFormat; 
 
    public DateFormatter(String datePattern) { 
        this.datePattern = datePattern; 
        dateFormat = new SimpleDateFormat(datePattern); 
        dateFormat.setLenient(false); 
    } 
 
    @Override 
    public String print(Date date, Locale locale) { 
        return dateFormat.format(date); 
    } 
 
    @Override 
    public Date parse(String s, Locale locale) throws ParseException { 
        try { 
            return dateFormat.parse(s); 
        } catch (ParseException e) { 
            // the error message will be displayed when using <form:errors> 
            throw new IllegalArgumentException( 
                    "invalid date format. Please use this pattern/"" 
                            + datePattern + "/""); 
        } 
    } 
}

package app07a.validator; 
 
import java.util.Date; 
 
import org.springframework.validation.Errors; 
import org.springframework.validation.ValidationUtils; 
import org.springframework.validation.Validator; 
 
import app07a.domain.Product; 
 
public class ProductValidator implements Validator { 
 
    @Override 
    public boolean supports(Class<?> klass) { 
        return Product.class.isAssignableFrom(klass); 
    } 
 
    @Override 
    public void validate(Object target, Errors errors) { 
        Product product = (Product) target; 
        ValidationUtils.rejectIfEmpty(errors, "name", "productname.required"); 
        ValidationUtils.rejectIfEmpty(errors, "price", "price.required"); 
        ValidationUtils.rejectIfEmpty(errors, "productionDate", "productiondate.required"); 
         
        Float price = product.getPrice(); 
        if (price != null && price < 0) { 
            errors.rejectValue("price", "price.negative"); 
        } 
        Date productionDate = product.getProductionDate(); 
        if (productionDate != null) { 
            // The hour,minute,second components of productionDate are 0 
            if (productionDate.after(new Date())) { 
                System.out.println("salah lagi"); 
                errors.rejectValue("productionDate", "productiondate.invalid"); 
            } 
        } 
    } 
}

productname.required.product.name=Please enter a product name 
price.required=Please enter a price 
productiondate.required=Please enter a production date 
productiondate.invalid=Invalid production date. Please ensure the production date is not later than today. 
##productname.required=Please enter a product name

productname.required.product.name=/u8BF7/u8F93/u5165/u4EA7/u54C1/u7684/u540D/u5B57 
price.required=/u8BF7/u8F93/u5165/u4EF7/u683C 
productiondate.required=/u8BF7/u8F93/u5165/u751F/u4EA7/u65E5/u671F 
productiondate.invalid=Invalid production date. Please ensure the production date is not later than today. 
##productname.required=Please enter a product name 
typeMismatch.price=/u683C/u5F0F/u4E0D/u6B63/u786E 
typeMismatch.productionDate=/u65F6/u95F4/u683C/u5F0F/u4E0D/u6B63/u786E

<?xml version="1.0" encoding="UTF-8"?> 
<beans xmlns="http://www.springframework.org/schema/beans" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" 
    xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" 
    xsi:schemaLocation=" 
        http://www.springframework.org/schema/beans 
        http://www.springframework.org/schema/beans/spring-beans.xsd 
        http://www.springframework.org/schema/mvc 
        http://www.springframework.org/schema/mvc/spring-mvc.xsd      
        http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context.xsd"> 
 
    <context:component-scan base-package="app07a.controller" /> 
    <context:component-scan base-package="app07a.formatter" /> 
 
    <mvc:annotation-driven conversion-service="conversionService" /> 
 
    <mvc:resources mapping="/css/**" location="/css/" /> 
    <mvc:resources mapping="/*.html" location="/" /> 
 
    <bean id="viewResolver" 
        class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
        <property name="prefix" value="/WEB-INF/jsp/" /> 
        <property name="suffix" value=".jsp" /> 
    </bean> 
     
  
    <bean id="messageSource"  
            class="org.springframework.context.support.ReloadableResourceBundleMessageSource"> 
        <property name="basenames" > 
            <list> 
                <value>classpath:i18n_zh_CN</value> 
                <value>classpath:i18n_en_US</value> 
                 
            </list> 
         
        </property> 
    </bean> 
     
  
    <bean id="conversionService" 
        class="org.springframework.format.support.FormattingConversionServiceFactoryBean"> 
        <property name="formatters"> 
            <set> 
                <bean class="app07a.formatter.DateFormatter"> 
                    <constructor-arg type="java.lang.String" value="MM-dd-yyyy" /> 
                </bean> 
            </set> 
        </property> 
    </bean> 
</beans>

<%@ page language="java" contentType="text/html; charset=UTF-8" 
pageEncoding="UTF-8"%> 
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> 
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> 
<!DOCTYPE HTML> 
<html> 
<head> 
<meta charset="utf-8" /> 
<title>Add Product Form</title> 
<style type="text/css">@import url("<c:url value="/css/main.css"/>");</style> 
</head> 
<body> 
<div id="global"> 
<a>中文测试</a> 
<form:form commandName="product" action="product_save" method="post"> 
<fieldset> 
<legend>Add a product</legend> 
<p class="errorLine"> 
<form:errors path="name" cssClass="error"/> 
</p> 
<p> 
<label for="name">*Product Name: </label> 
<form:input id="name" path="name" tabindex="1"/> 
</p> 
<p> 
<label for="description">Description: </label> 
<form:input id="description" path="description" tabindex="2"/> 
</p> 
<p class="errorLine"> 
<form:errors path="price" cssClass="error"/> 
</p> 
<p> 
<label for="price">*Price: </label> 
<form:input id="price" path="price" tabindex="3"/> 
</p> 
<p class="errorLine"> 
<form:errors path="productionDate" cssClass="error"/> 
</p> 
<p> 
<label for="productionDate">*Production Date: </label> 
<form:input id="productionDate" path="productionDate" tabindex="4"/> 
</p> 
<p id="buttons"> 
<input id="reset" type="reset" tabindex="5"> 
<input id="submit" type="submit" tabindex="6"  
value="Add Product"> 
</p> 
</fieldset> 
</form:form> 
</div> 
</body> 
</html>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> 
<!DOCTYPE HTML> 
<html> 
<head> 
<title>View Product</title> 
<style type="text/css">@import url("<c:url value="/css/main.css"/>");</style> 
</head> 
<body> 
<div id="global"> 
<h4>${message}</h4> 
<p> 
<h5>Details:</h5> 
Product Name: ${product.name}<br/> 
Description: ${product.description}<br/> 
Price: $${product.price} 
</p> 
</div> 
</body> 
</html>

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %> 
<!DOCTYPE HTML> 
<html> 
<head> 
<title>Save Product</title> 
<style type="text/css">@import url("<c:url value="/css/main.css"/>");</style> 
</head> 
<body> 
<div id="global"> 
<h4>The product has been saved.</h4> 
<p> 
<h5>Details:</h5> 
Product Name: ${product.name}<br/> 
Description: ${product.description}<br/> 
Price: $${product.price} 
</p> 
</div> 
</body> 
</html>

<?xml version="1.0" encoding="UTF-8"?> 
<web-app version="3.0"  
xmlns="http://java.sun.com/xml/ns/javaee" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"> 
<servlet> 
<servlet-name>springmvc</servlet-name> 
<servlet-class> 
org.springframework.web.servlet.DispatcherServlet 
</servlet-class> 
<init-param> 
<param-name>contextConfigLocation</param-name> 
<param-value>/WEB-INF/config/springmvc-config.xml</param-value> 
</init-param> 
<load-on-startup>1</load-on-startup>     
</servlet> 
<servlet-mapping> 
<servlet-name>springmvc</servlet-name> 
<url-pattern>/</url-pattern> 
</servlet-mapping> 
</web-app>