我正在使用彈簧啟動(dòng)/Thymeleaf創(chuàng)建一個(gè)接受電子郵件地址的表單，重定向到顯示已接受電子郵件的結(jié)果頁面，并將其發(fā)送到第三方API（通過Oauth2進(jìn)行身份驗(yàn)證）。我在表單部分遇到問題，我正在嘗試使用Thymeleaf接受輸入以將其顯示在結(jié)果.html頁面上。當(dāng)我嘗試在結(jié)果頁面上顯示它時(shí)收到錯(cuò)誤，完整錯(cuò)誤是：[THYMELEAF][http-nio-8080-exec-4] Exception processing template "result.html": Exception evaluating SpringEL expression: "signup.email" (template: "result.html" - line 10, col 4)我試圖遵循這里提供的例子：https://spring.io/guides/gs/handling-form-submission/我已嘗試修改控制器，并添加解決方法中描述的注釋，例如：@PostMapping@GetMapping@RequestMapping<!--/*@thymesVar id="signup" type="com.mainconfig.controller1"*/-->下面是包含窗體的代碼：signup.html<!DOCTYPE html><html xmlns:th="http://www.thymeleaf.org"><html><head> <title>My Jmml</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head><body style="background-color: #2B2B2B"><br /><br /><h2 style="text-align:center">Contact Information</h2><!-- Input Form --><!--/*@thymesVar id="signup" type="com.mainconfig.controller1"*/--><form action="#" th:action="@{/signup}" th:object="${signup}" method="post"> <div align="center"> <label>Email Address</label><br /><br /> <!--/*@thymesVar id="email" type="String"*/--> <input type="text" th:field="*{email}" placeholder="Email" required /> <br /> <br /> <input class="submitbutton" type='submit' value='Submit'/> <br /> </div></form></body></html>應(yīng)顯示電子郵件（結(jié)果.html）的結(jié)果頁面：<!DOCTYPE HTML><html xmlns:th="http://www.thymeleaf.org"><head> <title>Thank you for your submission!</title> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /></head><body><h1>Thank you for your submission!</h1><p th:text="'Email: ' + ${signup.email}" /><a href="/index">Submit another message</a></body></html>預(yù)期輸出應(yīng)該是在注冊(cè)表單中收集后顯示在結(jié)果頁面上的電子郵件變量。如果您對(duì)如何更好地完成我正在嘗試的工作有建議，我愿意接受建議！我是春天/百葉的新手，但有Java / Jsp的經(jīng)驗(yàn)，謝謝你的任何幫助，請(qǐng)讓我知道，如果你需要任何其他幫助！
1 回答
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希望這將是你的一個(gè)起點(diǎn)。確保將 html 文件放在 /資源/模板 下。
我更改了一些您的注冊(cè)html和結(jié)果.html如下，它們?nèi)匀徊煌昝溃ū苊馐褂脙?nèi)聯(lián)樣式并使用外部樣式表！
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout">
<head>
<title>My Jmml</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body style="background-color: #2B2B2B">
<br /><br />
<h2 style="text-align:center">Contact Information</h2>
<!-- Input Form -->
<!--/*@thymesVar id="signup" type="com.mainconfig.controller1"*/-->
<form th:action="@{/signup}" th:object="${signup}" method="post">
<div align="center">
<label>Email Address</label><br /><br />
<!--/*@thymesVar id="email" type="String"*/-->
<input type="text" th:field="*{email}" placeholder="Email" />
<br />
<br />
<input class="submitbutton" type="submit" value="Submit"/>
<br />
</div>
</form>
</body>
結(jié)果.html看起來像這樣
<!DOCTYPE HTML>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout">
<head>
<title>Thank you for your submission!</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<h1>Thank you for your submission!</h1>
<p th:text="'Email: ' + ${email}" />
<a href="/index">Submit another message</a>
</body>
</html>
我還創(chuàng)建了一個(gè)表單對(duì)象，如果需要，請(qǐng)?jiān)诖颂幪砑悠渌侄?/p>
public class SignUpForm {
//you can put some annotations here if you want for validating the email
//for e.g @NotEmpty or a @Pattern(regexp to validate the email)
private String email;
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
最后是你的控制器。我將電子郵件從注冊(cè)帖子請(qǐng)求傳遞到結(jié)果.html通過flash屬性：
@Controller
public class Controller1 {
@RequestMapping(value = "/signup", method= RequestMethod.GET)
public String signupForm(@ModelAttribute("signup") SignUpForm form) {
return "/signup";
}
@RequestMapping(value = "/signup", method= RequestMethod.POST)
public String signupSubmit(@ModelAttribute("signup") SignUpForm form, RedirectAttributes redirectAttributes) {
//validate form first -> check bindingResult documentation
//do what you need with your form object
redirectAttributes.addFlashAttribute("email", form.getEmail());
return "redirect:/result";
}
@RequestMapping(value = "/result", method= RequestMethod.GET)
public String result() {
return "/result";
}
}
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