请求方法＆＃x27; post＆＃x27;不支持-Java Spring Boot
我的撤离页面正常工作，当单击“寄存器”时，它会采用输入并将其推向数据库。但是，当我单击“列出一个项目”页面时，当单击“列表项目”时，它类似地将输入推到数据库中的表时，它带有“请求方法'post'不支持” 。因此，从主登录菜单页面单击时，“列表项目”页面不会显示。
控制器类的一部分：
@GetMapping("/register")
public String goToRegisterPage(Model model) {
User user = new User();
model.addAttribute("user", user);
return "register_page";
}
@GetMapping("/go_to_create_item_page")
public String goToCreateItemPage(Model model) {
FreeItem freeItem = new FreeItem();
model.addAttribute("freeItem", freeItem);
return "create_item_page";
}
此处提供的HTML文件的一部分，该文件提供的一部分可以转到create_item_page：
<div>
<form th:action="@{/update_user_page}" method="post">
<input type="submit" value="Update account" />
</form>
</div>
<div>
<form th:action="@{/go_to_create_item_page}" method="post">
<input type="submit" value="List an Item" />
</form>
</div>
create_item_page：
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="ISO-8859-1">
<title>Create Item</title>
<link rel="stylesheet" type="text/css" href="/webjars/bootstrap/css/bootstrap.min.css" />
</head>
<body>
<div class="container text-center">
<div>
<h1>Create an Item to list publicly</h1>
</div>
<form th:action="@{/process_created_item}" method="post"
style="max-width: 600px; margin: 0 auto;"
th:object="${freeItem}">
<div class="m-3">
<div class="form-group row">
<label class="col-form-label col-4">Item Name</label>
<div class="col-8">
<input type="text" class="form-control" th:field="*{itemName}" required
minlength="2" maxlength="20" />
</div>
</div>
<div class="form-group row">
<label class="col-form-label col-4">Item Description</label>
<div class="col-8">
<input type="text" class="form-control"
th:field="*{itemDescription}" required
minlength="6" maxlength="10" />
</div>
</div>
<div class="form-group row">
<label class="col-form-label col-4">Quantity Of Item</label>
<div class="col-8">
<input type="text" class="form-control" th:field="*{quantityOfItem}" required
minlength="2" maxlength="20" />
</div>
</div>
<div class="form-group row">
<label class="col-form-label col-4">General Item Location</label>
<div class="col-8">
<input type="text" class="form-control" th:field="*{itemLocation}"
required minlength="2" maxlength="20" />
</div>
</div>
<div class="form-group row">
<label class="col-form-label col-4">E-mail for contact</label>
<div class="col-8">
<input type="email" class="form-control" th:field="*{email}"
required />
</div>
</div>
<div>
<button type="submit" class="btn btn-primary">List Item</button>
</div>
</div>
</form>
</div>
</body>
</html>
以及指定被推到数据库的对象的FreeItem类。
package com.marinelli.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name= "free_items")
public class FreeItem {
public FreeItem(String itemName, String itemDescription, String quantityOfItem, String itemLocation, String email) {
super();
this.itemName = itemName;
this.itemDescription = itemDescription;
this.quantityOfItem = quantityOfItem;
this.itemLocation = itemLocation;
this.email = email;
}
public FreeItem() {
}
@Id
@Column(nullable = false, unique = true, length = 64)
private String itemName;
@Column(nullable = false, length = 64)
private String itemDescription;
@Column(nullable = false, length = 25)
private String quantityOfItem;
@Column(nullable = false, length = 25)
private String itemLocation;
@Column(nullable = false, unique = true, length = 45)
private String email;
public String getItemName() {
return itemName;
}
public void setItemName(String itemName) {
this.itemName = itemName;
}
public String getItemDescription() {
return itemDescription;
}
public void setItemDescription(String itemDescription) {
this.itemDescription = itemDescription;
}
public String getQuantityOfItem() {
return quantityOfItem;
}
public void setQuantityOfItem(String quantityOfItem) {
this.quantityOfItem = quantityOfItem;
}
public String getItemLocation() {
return itemLocation;
}
public void setItemLocation(String itemLocation) {
this.itemLocation = itemLocation;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Override
public String toString() {
return "FreeItem [itemName=" + itemName + ", itemDescription=" + itemDescription + ", quantityOfItem="
+ quantityOfItem + ", itemLocation=" + itemLocation + ", email=" + email + "]";
}
}
My resister page works fine, it takes the input and pushes to data base when "register" is clicked. However, when I click to go to a "list an item" page, which similarly takes input to be pushed to a table in a database when "list item" is clicked, it comes up with "Request Method 'POST' not supported". So the "list an item" page doesn't appear when clicked from the main logged-in menu page.
Part of the controller class here:
@GetMapping("/register")
public String goToRegisterPage(Model model) {
User user = new User();
model.addAttribute("user", user);
return "register_page";
}
@GetMapping("/go_to_create_item_page")
public String goToCreateItemPage(Model model) {
FreeItem freeItem = new FreeItem();
model.addAttribute("freeItem", freeItem);
return "create_item_page";
}
Part of the html file here that offers to go to the create_item_page:
<div>
<form th:action="@{/update_user_page}" method="post">
<input type="submit" value="Update account" />
</form>
</div>
<div>
<form th:action="@{/go_to_create_item_page}" method="post">
<input type="submit" value="List an Item" />
</form>
</div>
The create_item_page:
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="ISO-8859-1">
<title>Create Item</title>
<link rel="stylesheet" type="text/css" href="/webjars/bootstrap/css/bootstrap.min.css" />
</head>
<body>
<div class="container text-center">
<div>
<h1>Create an Item to list publicly</h1>
</div>
<form th:action="@{/process_created_item}" method="post"
style="max-width: 600px; margin: 0 auto;"
th:object="${freeItem}">
<div class="m-3">
<div class="form-group row">
<label class="col-form-label col-4">Item Name</label>
<div class="col-8">
<input type="text" class="form-control" th:field="*{itemName}" required
minlength="2" maxlength="20" />
</div>
</div>
<div class="form-group row">
<label class="col-form-label col-4">Item Description</label>
<div class="col-8">
<input type="text" class="form-control"
th:field="*{itemDescription}" required
minlength="6" maxlength="10" />
</div>
</div>
<div class="form-group row">
<label class="col-form-label col-4">Quantity Of Item</label>
<div class="col-8">
<input type="text" class="form-control" th:field="*{quantityOfItem}" required
minlength="2" maxlength="20" />
</div>
</div>
<div class="form-group row">
<label class="col-form-label col-4">General Item Location</label>
<div class="col-8">
<input type="text" class="form-control" th:field="*{itemLocation}"
required minlength="2" maxlength="20" />
</div>
</div>
<div class="form-group row">
<label class="col-form-label col-4">E-mail for contact</label>
<div class="col-8">
<input type="email" class="form-control" th:field="*{email}"
required />
</div>
</div>
<div>
<button type="submit" class="btn btn-primary">List Item</button>
</div>
</div>
</form>
</div>
</body>
</html>
And the FreeItem class that specifies the objects being pushed to the database.
package com.marinelli.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name= "free_items")
public class FreeItem {
public FreeItem(String itemName, String itemDescription, String quantityOfItem, String itemLocation, String email) {
super();
this.itemName = itemName;
this.itemDescription = itemDescription;
this.quantityOfItem = quantityOfItem;
this.itemLocation = itemLocation;
this.email = email;
}
public FreeItem() {
}
@Id
@Column(nullable = false, unique = true, length = 64)
private String itemName;
@Column(nullable = false, length = 64)
private String itemDescription;
@Column(nullable = false, length = 25)
private String quantityOfItem;
@Column(nullable = false, length = 25)
private String itemLocation;
@Column(nullable = false, unique = true, length = 45)
private String email;
public String getItemName() {
return itemName;
}
public void setItemName(String itemName) {
this.itemName = itemName;
}
public String getItemDescription() {
return itemDescription;
}
public void setItemDescription(String itemDescription) {
this.itemDescription = itemDescription;
}
public String getQuantityOfItem() {
return quantityOfItem;
}
public void setQuantityOfItem(String quantityOfItem) {
this.quantityOfItem = quantityOfItem;
}
public String getItemLocation() {
return itemLocation;
}
public void setItemLocation(String itemLocation) {
this.itemLocation = itemLocation;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Override
public String toString() {
return "FreeItem [itemName=" + itemName + ", itemDescription=" + itemDescription + ", quantityOfItem="
+ quantityOfItem + ", itemLocation=" + itemLocation + ", email=" + email + "]";
}
}
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评论（2）
您需要创建
go_to_to_create_item_page和update_user_page作为@postmapping（“ ....”）>you need to create
go_to_create_item_pageandupdate_user_pageas@Postmapping("....")该错误清楚地表明，您正在为提供的端点使用不正确的方法。
在您的情况下， /go_to_create_item_page定义为get，您的表单已声明为方法= post。将它们更改为使用帖子或获得的要么应该解决问题（就API设计而言，应该获取，因为您从服务器获得资源而不是创建 /更新）。
The error clearly stated that you are using the incorrect method for that provided endpoint.
In your case, /go_to_create_item_page defined as GET, your form declared method = post. Either changing them to both use POST or GET should resolve the problem (In terms of API design, it should be GET, as you are getting resources from the server rather than creating / updating).