java在spring mvc中遇到400错误
产品。jsp
<a href=" <spring:url value="/product/${product.id}" /> "
class="btn btn-primary"> <span
class="glyphicon-info-sign glyphicon" /></span>Details</a>
产品控制器。爪哇
@Controller
public class ProductController {
@Autowired
ProductService productService;
@RequestMapping("/productlist")
public String productList(Map<String, Object> map, Principal principal){
map.put("productlist",productService.listProduct());
if(principal != null){
String name = principal.getName();
map.put("username", name);
}
return "products";
}
@RequestMapping("/product/{id}")
public String product(Map<String,Object> map,@PathVariable int productID){
map.put("product",productService.getProduct(productID));
return "product";
}
}
产品。jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ include file="taglib.jsp" %>
<section class="container" >
<div class="row">
<div class="col-md-5">
<img src="<c:url value="/resource/productimages/${product.id}.png"></c:url>" alt="image" style = "width:100%"/>
</div>
<div class="col-md-5">
<h3>${product.name}</h3>
<p>${product.description}</p>
<p>
<strong>Item Code : </strong><span class="label label-warning">${product.id}</span>
</p>
</div>
</div>
</section>
根拉尔。xml-ApacheTiles
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE tiles-definitions PUBLIC
"-//Apache Software Foundation//DTD Tiles Configuration 3.0//EN"
"http://tiles.apache.org/dtds/tiles-config_3_0.dtd">
<tiles-definitions>
<definition name="common" template="/WEB-INF/layout/classic.jsp">
<put-attribute name="footer" value="/WEB-INF/layout/footer.jsp" />
</definition>
<definition name="product" extends="common">
<put-attribute name="title" value="product details" />
<put-attribute name="body" value="/WEB-INF/views/jsp/product.jsp" />
<put-attribute name="current" value="product" />
</definition>
<definition name="checkout" extends="common">
<put-attribute name="title" value="checkout details" />
<put-attribute name="body" value="/WEB-INF/views/jsp/Checkout.jsp" />
<put-attribute name="current" value="checkout" />
</definition>
</tiles-definitions>
当我试图通过产品访问任何产品时。jsp我得到这个400错误,即使我的jsp文件存在,甚至所有其他jsp我可以访问,但得到的错误只有在这个url
# 1 楼答案
@PathVariable int productID
是个问题。模板变量,例如id
,与变量名,例如productID
不相等。你应该调和这两者:或者:
为了处理
@PathVariable
注释,Spring MVC需要按名称查找匹配的URI模板变量。可以在注释中指定它:或者,如果URI模板变量名与方法参数名匹配,则可以忽略该细节。只要您的代码在编译时没有调试信息,Spring MVC就会将方法参数名与URI模板变量名匹配: