[英]Spring Boot returns 404
我想用 Java 后端獲得一個正在運行的 Springboot 應用程序。
我嘗試了 web 的示例應用程序。 我在 Tomcat 上運行。 我可以安裝 maven,並運行 jar。 我可以打開 Localhost:8082/ 並返回 some.json 文檔。
我不能做的是跳轉到 some.html 頁面。 我的結構有錯誤嗎?
結構:
HomeController.java
package com.example.demo.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class HomeController {
@RequestMapping("/home")
public String home() {
return "index";
}
@RequestMapping("/test")
public String test() {
return "test";
}
}
應用程序屬性:
spring.mvc.view.prefix = /views/
spring.mvc.view.suffix = .html
server.port=8082
應用:
@SpringBootApplication
public class BootDemoApplication {
@Autowired
UserRepository userRepository;
public static void main(String[] args) {
SpringApplication.run(BootDemoApplication.class, args);
}
}
}
運行輸出:
映射應該工作:
2020-12-03 10:09:23.444 INFO 4764 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/test]}" onto public java.lang.String com.example.demo.controller.HomeController.test()
2020-12-03 10:09:23.446 INFO 4764 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/home]}" onto public java.lang.String com.example.demo.controller.HomeController.home()
我試圖將 application.properties 更改為:
spring.mvc.view.prefix = resources/static/views/
和
spring.mvc.view.prefix = /static/views/
這對結果沒有影響。
有錯誤,我看不到嗎?
謝謝
我的POM.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example</groupId>
<artifactId>bootdemo</artifactId>
<version>1.0</version>
<packaging>jar</packaging>
<name>bootDemo</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.3.RELEASE</version>
<relativePath /> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-rest</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.restdocs</groupId>
<artifactId>spring-restdocs-mockmvc</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.3.4.RELEASE</version>
<type>maven-plugin</type>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
修復應用程序屬性。
spring:
mvc:
view:
suffix : .html
並致電 url: http://localhost:8082/views/index
嘗試將 @ComponentScan 添加到主 class @SpringBootApplication @ComponentScan(basePackageClasses = HomeController.class) public class BootDemoApplication {
您可以使用 thymeleaf 作為模板引擎,並將您的視圖放在模板文件夾 src/main/resources > templates 下,謝謝
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