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SpringMVC表单的验证及国际化

1.导入Hibernate-validate需要的jar包

2.编写实体类User并加上验证注解


public class User {
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public Date getBirth() {
        return birth;
    }
    public void setBirth(Date birth) {
        this.birth = birth;
    }
    @Override
    public String toString() {
        return "User [id=" + id + ", name=" + name + ", birth=" + birth + "]";
    }    
    private int id;
    @NotEmpty
    private String name;
 
    @Past
    @DateTimeFormat(pattern="yyyy-MM-dd")
    private Date birth;
}

ps:@Past表示时间必须是一个过去值

3.在jsp中使用SpringMVC的form表单

<form:form action="form/add" method="post" modelAttribute="user">
    id:<form:input path="id"/><form:errors path="id"/><br>
    name:<form:input path="name"/><form:errors path="name"/><br>
    birth:<form:input path="birth"/><form:errors path="birth"/>
    <input type="submit" value="submit">
</form:form>

ps:path对应name

4.Controller中代码

@Controller
@RequestMapping("/form")
public class formController {
    @RequestMapping(value="/add",method=RequestMethod.POST)    
    public String add(@Valid User u,BindingResult br){
        if(br.getErrorCount()>0){            
            return "addUser";
        }
        return "showUser";
    }
     
    @RequestMapping(value="/add",method=RequestMethod.GET)
    public String add(Map<String,Object> map){
        map.put("user",new User());
        return "addUser";
    }
}

ps:

1.因为jsp中使用了modelAttribute属性,所以必须在request域中有一个"user".

2.@Valid 表示按照在实体上标记的注解验证参数

3.返回到原页面错误信息回回显,表单也会回显

5.错误信息自定义

在src目录下添加locale.properties

NotEmpty.user.name=name can't not be empty
Past.user.birth=birth should be a past value
DateTimeFormat.user.birth=the format of input is wrong
typeMismatch.user.birth=the format of input is wrong
typeMismatch.user.id=the format of input is wrong
在SpringMVC配置文件中配置



<!-- configure the locale resource -->
<bean id="messageSource" class="org.springframework.context.support.ResourceBundleMessageSource">
    <property name="basename" value="locale"></property>
</bean>

6.国际化显示

在src下添加locale_zh_CN.properties

username=账号
password=密码
locale.properties中添加



username=user name
password=password
创建一个locale.jsp



<body>
  <fmt:message key="username"></fmt:message>
  <fmt:message key="password"></fmt:message>
</body>

在SpringMVC中配置

<!-- make the jsp page can be visited -->
<mvc:view-controller path="/locale" view-name="locale"/>




让locale.jsp在WEB-INF下也能直接访问

最后,访问locale.jsp,切换浏览器语言,能看到账号和密码的语言也切换了