请在拒绝投票之前写出原因,或搁置问题或其他内容...

我已经创建了一个简单的spring-boot应用程序,但是由于某种原因,该 View 无法映射,并且出现以下错误:

o.s.web.servlet.PageNotFound - No mapping for GET /WEB-INF/views/welcome.jsp

java - o.s.web.servlet.PageNotFound-GET/WEB-INF/views/welcome.jsp没有映射-LMLPHP

此语句后出现问题:
return "welcome";

这是 pom.xml 文件:
<?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>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>demo</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.1.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</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>

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


</project>

我的文件夹结构如下所示:

java - o.s.web.servlet.PageNotFound-GET/WEB-INF/views/welcome.jsp没有映射-LMLPHP

这是WelcomeController:
package com.example.demo.Controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/")
public class WelcomeController {

    @GetMapping("/")
    public String welcome(){

        return "welcome";

    }

}

这是application.properties:
spring.mvc.view.prefix=/WEB-INF/views/
spring.mvc.view.suffix=.jsp
spring.mvc.static-path-pattern=/resources/**
server.port=8089

这是DemoApplication类:
package com.example.demo;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

这是welcome.jsp文件:
<html>
    <head>

    </head>
    <body>
        this is welcome page
        this is welcome page
    </body>
</html>

java - o.s.web.servlet.PageNotFound-GET/WEB-INF/views/welcome.jsp没有映射-LMLPHP

最佳答案

同样的问题也出现在我的身边,并设法通过以下方式解决了这个问题。 Controller 是相同的,并且初始化初始化Application的方式也相同。

我使用gradle,但是在Maven的情况下依赖关系是相同的。

dependencies {
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-web', version: '2.3.0.RELEASE'
    compile group: 'org.apache.tomcat.embed', name: 'tomcat-embed-jasper', version: '9.0.35'
}

我使用java config,如下所示:

@Configuration
@EnableWebMvc
@ComponentScan
public class WebConfig implements WebMvcConfigurer {

    @Override
    public void configureViewResolvers(ViewResolverRegistry registry) {
       registry.jsp("/WEB-INF/views/", ".jsp");
    }

    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }
}
  • 您必须启用配置,否则tomcat无法通过WEB-INF渲染页面
  • WebConfig应该实现WebMvcConfigurer接口(interface)。
  • 10-06 14:02
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