嘗試在百里香葉/彈簧中製作刪除按鈕

試圖製作比一個按鈕長得多的按鈕會認爲它需要一個新手。嘗試在百里香葉/彈簧中製作刪除按鈕

我得到的錯誤信息是：

'java.lang.String' to required type 'java.lang.Long'; nested exception is java.lang.NumberFormatException: For input string: "${id}"

我在做什麼錯？提前致謝。

我的控制器：

@Controller 
public class BuyerController { 

    private BuyerService buyerService; 

    @Autowired 
    public void setBuyerService(BuyerService buyerService){ 
     this.buyerService = buyerService; 
    } 

    @RequestMapping("/add-buyer") 
    public String showBuyerPager(Model model){ 
     List<Buyer> buyers = buyerService.findAllBuyers(); 
     model.addAttribute("buyers", buyers); 
     model.addAttribute("buyer", new Buyer()); 
     return "add-buyer"; 
    } 

    @GetMapping("/showBuyerForm") 
    public String addBuyerForm(Model model){ 
     model.addAttribute("buyer", new Buyer()); 
     model.addAttribute("buyerId", new Buyer().getBuyerId()); 
     return "add-buyer"; 
    } 

    @PostMapping("/addBuyer") 
    public String postBuyerForm(@ModelAttribute("buyer") Buyer buyer, Model model){ 
     buyerService.saveBuyer(buyer); 
     model.addAttribute("buyer", new Buyer()); 
     return "redirect:/"; 
    } 


    @PostMapping("/deleteBuyer/{id}") 
    public String deleteBuyer(@PathVariable Long id){ 
     buyerService.deleteBuyer(id); 
     return "redirect:/"; 
    } 
}

查看：

<!DOCTYPE html> 
<html lang="en" xmlns:th="http://www.thymeleaf.org"> 
<head> 
    <title>Title</title> 
    <link href="styles.css" rel="stylesheet" type="text/css"/> 
</head> 
<body> 
<header> Welcome to Toner Stock </header> 
<h1>Add Buyer</h1> 
<div id="mynav" align="center"> 
    <ul> 
     <li><a href="/">Home</a></li> 
     <li><a href="add-buyer">Add Buyer</a></li> 
     <li><a href="add-manager">Add Manager</a></li> 
     <li><a href="current-stock">Current Stock</a></li> 
     <li><a href="transactions">Transactions</a></li> 
     <li><a href="orders">Order Form</a></li> 
    </ul> 
</div> 

    <div id="display-table" align="center"> 
     <form th:action="@{/addBuyer}" th:object="${buyer}" style="width:100%" method="post"> 
      <table> 
       <td><label>First Name: </label></td> 
       <td><input type="text" th:field="*{firstName}"/></td> 
       <td><label>Last Name: </label></td> 
       <td><input type="text" th:field="*{lastName}"/></td> 
       <td><label>Enter Address: </label></td> 
       <td><input type="text" th:field="*{buyerAddress}"/></td> 
       <td><input type="submit" value="save"/></td> 
      </table> 
     </form> 
    </div> 
<div> 
    <div> 
     <table id="info-table" align="center" border="1"> 
      <tr> 
       <th>First Name</th> 
       <th>Last Name</th> 
       <th>Address</th> 
      </tr> 
      <tr th:each="buyer : ${buyers}"> 
       <td th:text="${buyer.firstName}"></td> 
       <td th:text="${buyer.lastName}"></td> 
       <td th:text="${buyer.buyerAddress}"></td> 
       <td> 
        <form th:action="@{/deleteBuyer/${id}}" th:object="${buyer}" method="post"> 
         <input type="hidden" th:field="${buyer}">Delete</input> 
         <button type="submit" onClick="return confirm('sure?')"/> 
        </form> 
       </td> 
      </tr> 
     </table> 
    </div> 
</div> 
    <div> 
     <select> 
      <option th:each="buyer : ${buyers}" 
        th:text="${buyer.firstName}" 
        th:value="${buyer.buyerId}" 
      ></option> 
     </select> 
    </div> 
<div> 
    <div> 
    </div> 
</div> 

</body> 
</html>

來源

2017-05-25 Ron Pitt

我不是一個thymeleaf專家，但它看起來像你的形式th:action="@{/deleteBuyer/${id}}"應該是th:action="@{/deleteBuyer/{id}(id=${buyer.buyerId})}"

來源

2017-05-25 02:25:26

謝謝指點先生。 –

嘗試在百里香葉/彈簧中製作刪除按鈕

回答

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