根据DefaultMessageCodesResolver
如果是代码“ typeMismatch”，则对象名称为“ user”，字段为“ age”
- typeMismatch.user.age
- typeMismatch.age
- typeMismatch.int
- 类型不匹配
因此，您应该得到（我想您的commandName被称为 command， 并且您的属性是 age ）根据您的代码进行调整
typeMismatch.command.agetypeMismatch.agetypeMismatch.java.lang.IntegertypeMismatch
注意第三条代码
typeMismatch.java.lang.Integer
它将解决您想要的
更新
我创建了一个Person命令类
public class Person implements Serializable { private Integer age; public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; }}和一个人控制器
public class PersonController extends SimpleFormController { public PersonController() { setCommandClass(Person.class); setValidator(new Validator() { public boolean supports(Class clazz) { return clazz.isAssignableFrom(Person.class); } public void validate(Object command, Errors errors) { rejectIfEmpty(errors, "age", "Age is required"); } }); } @Override protected ModelAndView onSubmit(Object command) throws Exception { return new ModelAndView(); }}这是我的myMessages.properties（类路径的根）
typeMismatch.command.age=typeMismatch.command.agetypeMismatch.age=typeMismatch.agetypeMismatch.java.lang.Integer=typeMismatch.java.lang.IntegertypeMismatch=typeMismatch
所以，我做了以下测试
public class PersonControllerTest { private PersonController personController; private MockHttpServletRequest request; private MessageSource messageSource; @Before public void setUp() { request = new MockHttpServletRequest(); request.setMethod("POST"); personController = new PersonController(); messageSource = new ResourceBundleMessageSource(); ((ResourceBundleMessageSource) messageSource).setbasename("myMessages"); } @Test public void failureSubmission() throws Exception { request.addParameter("age", "not a meaningful age"); ModelAndView mav = personController.handleRequest(request, new MockHttpServletResponse()); BindingResult bindException = (BindingResult) mav.getModel().get(BindingResult.MODEL_KEY_PREFIX + "command"); for (Object object : bindException.getAllErrors()) { if(object instanceof FieldError) { FieldError fieldError = (FieldError) object; assertEquals(fieldError.getField(), "age"); System.out.println(messageSource.getMessage((FieldError) object, null)); } } }}如果要第二个，则 必须摆脱 typeMismatch.command.age密钥资源包
typeMismatch.age=typeMismatch.agetypeMismatch.java.lang.Integer=typeMismatch.java.lang.IntegertypeMismatch=typeMismatch
或编写您自己的MessageCodesResolver实现
public class MyCustomMessageCodesResolver implements MessageCodesResolver { private DefaultMessageCodesResolver defaultMessageCodesResolver = new DefaultMessageCodesResolver(); public String [] resolveMessageCodes(String errorCode, String objectName) { if(errorCode.equals("age")) return new String[] {"typeMismatch.age"}; return defaultMessageCodesResolver.resolveMessageCodes(String errorCode, String objectName); } public void String[] resolveMessageCodes(String errorCode, String objectName, String field, Class fieldType) { if(errorCode.equals("age")) return new String[] {"typeMismatch.age"}; return defaultMessageCodesResolver.resolveMessageCodes(String errorCode, String objectName, String field, Class fieldType); }}并设置您的PersonController
public class PersonController extends SimpleFormController { public PersonController() { setMessageCodesResolver(new MyCustomMessageCodesResolver()); setCommandClass(Person.class); setValidator(new Validator() { public boolean supports(Class clazz) { return clazz.isAssignableFrom(Person.class); } public void validate(Object command, Errors errors) { rejectIfEmpty(errors, "age", "Age is required"); } }); }
