我試圖在與 Thymleaf 和 Spring 中的表單相同的頁面上顯示結果，這是我到目前為止所嘗試的：
控制器：
@Controller
public class ThymeleafController {
@GetMapping("/hello")
public String getHello() {
return "hello";
}
@PostMapping("/test")
public String test(@RequestParam("text1")String str, Model model) {
model.addAttribute("sample", str);
return "test";
}
}
test.html 頁面：
<!DOCTYPE html>
<html xmlns:th ="http://www.thymeleaf.org" >
<head>
<meta charset ="UTF-8" ></meta>
<title> Hello World</title>
</head>
<body>
<h1> Hello World</h1>
<form method ="post" action ="/test" >
Enter: <input type ="text" name ="text1" />
<input type ="submit" value ="click" />
</form>
<span th:text ="${sample == null} ? 'null' : ${sample}" ></span>
</body>
</html>
當我進入測驗頁面時，我看到了這個錯誤：
There was an unexpected error (type=Method Not Allowed, status=405).
Request method 'GET' not supported
org.springframework.web.HttpRequestMethodNotSupportedException: Request method 'GET' not supported
有人可以給我一個想法或一個例子，我如何在與表單/輸入相同的頁面上顯示一個值？謝謝
uj5u.com熱心網友回復：
參考：https ://hellokoding.com/handling-form-submission-example-with-java-spring-boot-and-freemarker/
添加 for get ，這樣這個問題就會得到解決。
@Controller
public class ThymeleafController {
@GetMapping("/hello")
public String getHello() {
return "hello";
}
@GetMapping("/test")
public String testfrm() {
return "test";
}
@PostMapping("/test")
public String test(@RequestParam("text1")String str, Model model) {
return "test";
}
}
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