java Spring bean没有在Spring REST中初始化

Question

我的SpringBean没有在SpringJava配置中初始化，我正在使用它创建一个示例SpringREST应用程序（因为不需要Web.xml，所以我已经删除了它）。调用REST端点/dest/types时也会得到404

谁能帮忙吗Project Structure

波姆。xml:

<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/maven-v4_0_0.xsd">

    <modelVersion>4.0.0</modelVersion>
    <groupId>com.travel</groupId>
    <artifactId>patcyyRestApp</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>patcyyRestApp Maven Webapp</name>
    <url>http://maven.apache.org</url>

    <properties>
        <springframework.version>5.0.9.RELEASE</springframework.version>
        <jackson.library>2.9.6</jackson.library>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <hibernate.core.version>5.3.6.Final</hibernate.core.version>
        <javax.servlet.api.version>3.1.0</javax.servlet.api.version>
        <lombok.version>1.18.12</lombok.version>
        <apache.commons.version>3.9</apache.commons.version>
        <failOnMissingWebXml>false</failOnMissingWebXml>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${springframework.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${springframework.version}</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>${javax.servlet.api.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jackson.library}</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>${hibernate.core.version}</version>
        </dependency>

        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>${lombok.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>${apache.commons.version}</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>patcyyRestApp</finalName>
    </build>
</project>

分派初始值设定项：

package com.patcyy.rest.config;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

public class PatcyyDispatcherServletInitializer  extends 
    AbstractAnnotationConfigDispatcherServletInitializer {

    @Override
    protected Class<?>[] getRootConfigClasses() {
        return null;
    }

    @Override
    protected Class<?>[] getServletConfigClasses() {
        System.out.println("Inside getServletConfigClasses");
        return new Class[] { PatcyyConfig.class };
    }

    @Override
    protected String[] getServletMappings() {
        System.out.println("Inside mapping");

        return new String[] { "/patcyy" };
    }

}

配置：

package com.patcyy.rest.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

@Configuration
@EnableWebMvc
@ComponentScan("com.patcyy.rest")
public class PatcyyConfig {

}

控制器：

package com.patcyy.rest.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;   
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.GetMapping; 
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.patcyy.rest.response.DestinationTypes;
import com.patcyy.rest.service.IDestinationService;

@RestController
@RequestMapping(path = "/dest", consumes = MediaType.APPLICATION_JSON_UTF8_VALUE, produces = 
     MediaType.APPLICATION_JSON_UTF8_VALUE)
public class DestinationController extends BaseController {

    private final IDestinationService iDestinationService;

    /**
     * @param iDestinationService
     */
    public DestinationController(@Autowired IDestinationService iDestinationService) {
        super();
        this.iDestinationService = iDestinationService;
    }

    @GetMapping("/types")
    public ResponseEntity<List<DestinationTypes>> getDestinationTypes() {
        List<DestinationTypes> destTypes = iDestinationService.getDestinationTypes();
        return new ResponseEntity<List<DestinationTypes>>(destTypes, HttpStatus.OK);
    }

}

Answer 1

请共享控制台日志以便进一步调查。根据我看到以上代码后的理解，您可以替换

"/patcyy" with only "/" in getServletMappings() method.

您请求的资源url如下所示：

http://{hostname:port}/patcyyRestApp/dest/types

这是由于无效的url servlet映射导致的

Answer 2

我认为问题在于ComponentScan（）。 @ComponentScan注释和@Configuration注释一起指定要扫描的包@不带参数的ComponentScan告诉Spring扫描当前包及其所有子包。 在您的情况下，您需要添加basepackages=“com.patcyy.rest”

Answer 3

我不得不做两次修改来解决这个问题

1. 因为我只使用Java配置，所以我删除了Web。xml。所以我不得不在服务器上进行更改。Tomcat的xml格式： <Context path="/patcyyRestApp" reloadable="true" docBase="D:\battleGround\patcyyRestApp\target\patcyyRestApp"/></Host>

2. 我必须将Dispatcher Initializer中的servlet映射更新为： return new String[] { "/patcyy/*" };

在做了这两个更改之后，它现在运行良好

请看一下这个Tomcat without web xml