How do I pass an object with thymeleaf to java spring controller?
[英]How do I pass an object with thymeleaf to java spring controller?
问题描述
I can't pass a object Project without the object is null.
如果没有 object 是 null，我无法通过 object项目。 How do I pass the object to the spring controller from the html?如何将 object 传递给 spring controller？
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Home</title>
</head>
<body>
<form action="/addproject" method="POST">
<input type="hidden" name="project" th:value="${project}"/>
<input type="submit" value="Save Project" class="submit">
</form>
</body>
</html>
@Controller
public class ProjectController {
@GetMapping("/")
public String indexPage(Model model) {
model.addAttribute("project", new Project("Test", "Test"));
return "index";
}
@PostMapping("/addproject")
public String add(WebRequest webRequest) {
Project p = (Project) webRequest.getAttribute("project", WebRequest.SCOPE_REQUEST);
return "index";
}
}
2 个解决方案
解决方案1
2 2021-12-03 10:11:34
Please checkthis article .请检查这篇文章。 In short you need to pass required object to ModelAndView , not Model :简而言之，您需要将所需的 object 传递给ModelAndView ，而不是Model ：
@GetMapping("/")
public ModelAndView indexPage(Model model) {
ModelAndView mav = new ModelAndView("index");
mav.addObject("project", new Project("Test", "Test"));
return mav;
}
and access it by name from template:并从模板中按名称访问它：
<b th:text="${project.attribute}">Text ...</b>
解决方案2
0 2021-12-03 10:12:36
Please use these reference: -https://www.thymeleaf.org/doc/articles/springmvcaccessdata.html请使用这些参考： -https://www.thymeleaf.org/doc/articles/springmvcaccessdata.html
解决方案3
0 2021-12-03 10:27:39
I would suggest you to proceed with the document here first.我建议您先在此处处理文档。
As in the other answer, you don't have a requirement or problem with ModelAndView .与其他答案一样，您对ModelAndView没有要求或问题。
The first time you call the /project page, the project class information will be loaded by @GetMapping , if you want, it will be captured by @PostMapping when you change and submit it.第一次调用/project页面时，@GetMapping 会加载项目@GetMapping信息，如果需要，在更改并提交时会被@PostMapping捕获。
add-project.html file: add-project.html文件：
<!DOCTYPE HTML>
<html xmlns:th="https://www.thymeleaf.org">
<head>
<title>Project Form</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
</head>
<body>
<h1>Project Form</h1>
<form method="post" th:action="@{/project}" th:object="${project}">
<p>Name: <input type="text" th:field="*{name}" /></p>
<p>Description: <input type="text" th:field="*{description}" /></p>
<p><input type="submit" value="Submit" /> </p>
</form>
</body>
</html>
Project.java file: Project.java文件：
public class Project {
private String name;
private String description;
public Project(String name, String description) {
this.name = name;
this.description = description;
}
// getter/setter ...
}
ProjectController.java file: ProjectController.java文件：
@Controller
public class ProjectController {
@GetMapping("/project")
public String greetingForm(Model model) {
model.addAttribute("project", new Project("PN1", "PD1"));
return "add-project";
}
@PostMapping("/project")
public String greetingSubmit(@ModelAttribute Project project, Model model) {
model.addAttribute("project", project);
return "add-project";
}
}
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