Spring Boot 不支持请求方法“POST”

问题描述 投票：0回答：4

简单的 Spring Boot POST 请求不起作用并返回： “不支持请求方法‘POST’”错误消息。

代码本身对我来说看起来不错，但我对 pom.xml 不太确定。 如果问题依赖于 pom.xml，那么这种情况是没有希望的，因为我什至不知道所有这些依赖项的作用，也不知道为什么存在重复项。

这是我的控制器类：

@Controller
public class StudentController {

@Autowired
private StudentRepository studentRepository;


@GetMapping("/")
public String list(Model model) {
    model.addAttribute("students", studentRepository.findAll());
    return "index";
}


@PostMapping("/")
public String add(@RequestParam String name) {
    Student student = new Student(name);
    this.studentRepository.save(student);
    return "redirect:/";
}
}

索引.html 

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" 
xmlns:th="http://www.thymeleaf.org">
<head>
    <title>Test</title>
</head>
<body>
    <p>List all students </p>

    <p>Add a Student</p>

 <form th:action="@{/}" method="POST">
    <input type="text" name="name"/>
    <input type="submit"/>
</form>

<p>Students</p>

<p th:each="student : ${students}">
    <span th:text="${student.name}">student name</span>
</p>

</body>
</html>

Pom.xml

<properties>
    <java.version>1.8</java.version>
</properties>

<dependencies>
 <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
    </dependency>        
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
    </dependency>

    <dependency>
        <groupId>org.fluentlenium</groupId>
        <artifactId>fluentlenium-junit</artifactId>
        <version>3.7.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.fluentlenium</groupId>
        <artifactId>fluentlenium-assertj</artifactId>
        <version>3.7.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>htmlunit-driver</artifactId>
    </dependency>  

</dependencies>

<build>
    <plugins>
    <plugin>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-maven-plugin</artifactId>
    </plugin>
    </plugins>
    <resources>
    <resource>
        <directory>src/main/resources</directory>
        <filtering>true</filtering>
    </resource>
    </resources>
</build>
</project>

代码应该将学生添加到studentRepository并重定向回index.html并立即显示添加的学生。

来自soapUI的错误消息：

"timestamp": "2019-05-24T09:02:36.088+0000",
"status": 405,
"error": "Method Not Allowed",
"message": "Request method 'POST' not supported",
"trace": "org.springframework.web.HttpRequestMethodNotSupportedException: 
"path": "/"

完整踪迹：

> "trace":
> "org.springframework.web.HttpRequestMethodNotSupportedException: 
> Request method 'POST' not supported\r\n\tat 
> org.springframework.web.servlet.support.WebContentGenerator.checkRequest(WebContentGenerator.java:380)\r\n\tat
> org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:163)\r\n\tat
> org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:52)\r\n\tat
> org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1039)\r\n\tat
> org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)\r\n\tat
> org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)\r\n\tat
> org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:908)\r\n\tat
> javax.servlet.http.HttpServlet.service(HttpServlet.java:660)\r\n\tat
> org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)\r\n\tat
> javax.servlet.http.HttpServlet.service(HttpServlet.java:741)\r\n\tat
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)\r\n\tat
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat
> org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)\r\n\tat
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat
> org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)\r\n\tat
> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat
> org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)\r\n\tat
> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat
> org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93)\r\n\tat
> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat
> org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)\r\n\tat
> org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\r\n\tat
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\r\n\tat
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\r\n\tat
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)\r\n\tat
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)\r\n\tat
> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)\r\n\tat
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)\r\n\tat
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)\r\n\tat
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)\r\n\tat
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)\r\n\tat
> org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)\r\n\tat
> org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)\r\n\tat
> org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:836)\r\n\tat
> org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1747)\r\n\tat
> org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)\r\n\tat
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)\r\n\tat
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)\r\n\tat
> org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)\r\n\tat
> java.lang.Thread.run(Thread.java:745)\r\n"

应用程序.属性

server.port=8083
[email protected]@
spring.datasource.url=jdbc:h2:file:./database;create=true
spring.jpa.hibernate.ddl-auto=update
spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.H2Dialect

工作正常的教程：

控制器类

@Controller
public class ItemDatabaseController {

@Autowired
private ItemRepository itemRepository;

@GetMapping("/")
public String list(Model model) {
    model.addAttribute("items", this.itemRepository.findAll());
    return "index";
}

@PostMapping("/")
public String add(@RequestParam String name) {
    this.itemRepository.save(new Item(name));
    return "redirect:/";
}

}

index.html

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" 
xmlns:th="http://www.thymeleaf.org">
<head>
    <title>Item Database</title>
</head>

<body>
    <h1>Item Database</h1>

    <table>
        <tr>
            <th>Items</th>
        </tr>

        <tr th:each="item : ${items}">
            <td th:text="${item.name}">Item name</td>
        </tr>
    </table>

    <h2>Add an item</h2>

    <form th:action="@{/}" method="POST">
        <span>Name:</span>
        <input type="text" name="name"/>
        <input type="submit" value="Add!"/>
    </form>
</body>
</html>

pom.xml

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
</properties>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.3.RELEASE</version>
    <relativePath/>
</parent>

<dependencies>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
    </dependency>        
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
    </dependency>

    <dependency>
        <groupId>org.fluentlenium</groupId>
        <artifactId>fluentlenium-junit</artifactId>
        <version>3.7.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.fluentlenium</groupId>
        <artifactId>fluentlenium-assertj</artifactId>
        <version>3.7.1</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>org.seleniumhq.selenium</groupId>
        <artifactId>htmlunit-driver</artifactId>
    </dependency>  
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

这两个实际上是相同的，除了下载了本教程并且我自己的项目是在 Eclipse 中创建为 Spring Boot：Spring Starter 项目。这是一个 Eclipse 插件。

java spring maven spring-boot pom.xml
4个回答
0
投票

使用 @RestController 而不是 @Controller 注解或

简单使用

@PostMapping("/")
@ResponseBody
0
投票

我建议对现有代码进行一些调整。请看看是否有效。

@Controller
@RequestMapping(path = "/", produces = MediaType.APPLICATION_JSON_VALUE)
public class StudentController {

@Autowired
private StudentRepository studentRepository;


@GetMapping("/")
public String list(Model model) {
    model.addAttribute("students", studentRepository.findAll());
    return "index";
}


@PostMapping(path = "/", produces = MediaType.APPLICATION_XML_VALUE)
public String add(@RequestBody String name) {
    Student student = new Student(name);
    this.studentRepository.save(student);
    return "redirect:/";
}
}

希望能解决问题。

0
投票

我认为，如果您从表单执行请求，注释

@RequestParam
可能是错误的。用于从 url 获取参数 (
?name=myname
)。您可能想尝试一下
@RequestBody
。

0
投票

当我的 html 位于 

Request method 'POST' not supported
文件夹中时，我收到了此 
static
错误，当我将 html 移至 
templates
时，错误消失了。我认为 Thymeleaf 基本上不会操作 
static
文件夹中的 html。

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