今天做springbook项目前端输入日期传到数据库保存报了一下错误
Whitelabel Error Page
This application has no explicit mapping for /error, so you are seeing this as a fallback.
Sun Feb 09 16:31:32 CST 2020
There was an unexpected error (type=Bad Request, status=400).
Validation failed for object=‘book‘. Error count: 1
org.springframework.validation.BindException: org.springframework.validation.BeanPropertyBindingResult: 1 errors Field error in object ‘book‘ on field ‘bookDate‘: rejected value [2020-02-06]; codes [typeMismatch.book.bookDate,typeMismatch.bookDate,typeMismatch.java.util.Date,typeMismatch]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [book.bookDate,bookDate]; arguments []; default message [bookDate]]; default message [Failed to convert value of type ‘java.lang.String[]‘ to required type ‘java.util.Date‘; nested exception is org.springframework.core.convert.ConversionFailedException: Failed to convert from type [java.lang.String] to type [java.util.Date] for value ‘2020-02-06‘; nested exception is java.lang.IllegalArgumentException] at org.springframework.web.method.annotation.ModelAttributeMethodProcessor.constructAttribute(ModelAttributeMethodProcessor.java:317) at org.springframework.web.method.annotation.ModelAttributeMethodProcessor.createAttribute(ModelAttributeMethodProcessor.java:224) at org.springframework.web.servlet.mvc.method.annotation.ServletModelAttributeMethodProcessor.createAttribute(ServletModelAttributeMethodProcessor.java:85) at org.springframework.web.method.annotation.ModelAttributeMethodProcessor.resolveArgument(ModelAttributeMethodProcessor.java:139) at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:127) at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:167) at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:134)。。。
前端代码：
<form th:action="@{/toAdd}">
<h2>添加图书信息</h2>
书名：<input type="text" name="bookName"/><br/>
简介：<input type="text" name="bookNote"/><br/>
作者：<input type="text" name="bookAuthor"/><br/>
价格：<input type="text" name="bookMoney"/><br/>
出版日期：<input type="date" name="bookDate"/><br/>
<input type="submit" value="添加"/>
</form>
数据库：
百度上说的方法差不多，就是在对应controller中添加一下代码
@InitBinder
protected void initBinder(WebDataBinder binder) {
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, true));
}
我试了一下果然可以！
代码如下：
@RequestMapping("/toAdd")
public String toAdd(Book book,Model model) {
bookService.addBook(book);
return "redirect:/toQueryAll";
}
@InitBinder
protected void initBinder(WebDataBinder binder) {
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, true));
}
注意这里的
Date.class是
import java.util.Date;包下的
Failed to convert from type [java.lang.String] to type [java.util.Date] for value '2020-02-06'; nested exception is java.lang.IllegalArgumentException]解决
原文：https://www.cnblogs.com/jpxjx/p/12287613.html
