问题:正如您从图片中看到的，浏览器无法加载 css 文件。 我也在 STS 控制台中得到这个异常:
[2m2018-02-10 19:00:57.770[0;39m [33m 警告[0;39m [35m16292[0;39m [2m---[0;39m [2m[nio-8080-exec-3 ][0;39m [36m.w.s.m.s.DefaultHandlerExceptionResolver[0;39m [2m:[0;39m 处理程序执行引起的已解决异常:org.springframework.web.bind.UnsatisfiedServletRequestParameterException:实际请求参数不满足参数条件“取消”:
the code was working fine until I completed the included Controller
有人知道为什么会这样吗？ 来自浏览器(firefox)的错误
][1]
!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head lang="en" th:fragment="head">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<!-- jQuery library -->
<script src="https://code.jquery.com/jquery-3.3.1.js"></script>
<!-- Latest compiled JavaScript -->
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7 /js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" />
<link th:href="@{/css/style2.css}" rel="stylesheet" media="screen" />
<link th:href="@{/css/login.css}" rel="stylesheet" media="screen"/>
<link rel="stylesheet" type="text/css" media="screen" th:href="@{/css/login.css}"/>
</head>
<body>
</body>
</html>
Controller
package com.intelbs.controllers;
import javax.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import com.intelbs.dao.Customer;
import com.intelbs.dao.Employee;
import com.intelbs.dao.Expense;
import com.intelbs.dao.Note;
import com.intelbs.services.ExpenseService;
@Controller
public class ExpenseController {
@Autowired
private ExpenseService expService;
@RequestMapping(value = "/monthlyExpenses", method = RequestMethod.GET)
public String listMonthlyExpenses(Model model, String month, String year) {
model.addAttribute("monthlyExpenses", expService.monthExpense(month, year));
return "monthlyexpensesform";
}
@RequestMapping(value="new_expense", method = RequestMethod.GET)
public String diplayAddExpenseForm( Model model) {
System.out.println("inside display");
model.addAttribute("expense", new Expense());
return "addexpenseform";
}
@RequestMapping(params= "save", method= RequestMethod.POST)
public String processAddExpenseForm(@Valid Expense expense, BindingResult br,
Model model, RedirectAttributes ra) {
System.out.println("inside processform");
if(br.hasErrors()) {
System.out.println("inside has er");
return"addexpenseform";
}
model.addAttribute("expense", expense);
expService.saveExpense(expense);
ra.addFlashAttribute("expense", expense);
return "redirect:/customers";
}
@RequestMapping(params = "cancel",method= {RequestMethod.GET, RequestMethod.POST})
public String cancelAddExpenseForm() {
return "redirect:/customers";
}
}
[Browser error]: /image/xO4l5.png
最佳答案
我认为您在 @RequestMapping 中错误地使用了 param 而不是 value。
其实param是用来缩小匹配某个URL的请求
参见 doc
A sequence of "myParam=myValue" style expressions, with a request only mapped if each such parameter is found to have the given value.
像这样重构你的代码。
@RequestMapping(value="/new_expense", method = RequestMethod.GET)
public String diplayAddExpenseForm( Model model) {
System.out.println("inside display");
model.addAttribute("expense", new Expense());
return "addexpenseform";
}
@RequestMapping(value= "/save", method= RequestMethod.POST)
public String processAddExpenseForm(@Valid Expense expense, BindingResult br,
Model model, RedirectAttributes ra) {
System.out.println("inside processform");
if(br.hasErrors()) {
System.out.println("inside has er");
return"addexpenseform";
}
model.addAttribute("expense", expense);
expService.saveExpense(expense);
ra.addFlashAttribute("expense", expense);
return "redirect:/customers";
}
@RequestMapping(value= "/cancel",method= {RequestMethod.GET, RequestMethod.POST})
public String cancelAddExpenseForm() {
return "redirect:/customers";
}
关于java - 没有为 spring boot 元素加载静态 css，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48727938/