使用Spring Boot的Restapi不通过角返回数据到客户端：从浏览器产生404响应

Question

我对这一切都很陌生。这就是问题所在。我有一个RESTAPI，使用Spring Boot连接到MySQL。访问我的API的URL是http://localhost/videogamereview/review/（id）。每当我访问这个URL时，我都会按预期获得JSON对象。

我还有一个单独的angular项目，它通过自己的路径连接到此API。例如：HTTP:localhost:8080/angular2/#！/应该调用API，但是我从浏览器收到404响应。

Spring配置文件：

package com.init;

import java.util.Properties;

import javax.sql.DataSource;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.hibernate5.HibernateTransactionManager;
import org.springframework.orm.hibernate5.LocalSessionFactoryBean;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.filter.CorsFilter;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

@Configuration
@ComponentScan(basePackages = "com")
@EnableTransactionManagement

public class MvcConfiguration extends WebMvcConfigurerAdapter {

    private static final String DATABASE_DRIVER = "com.mysql.jdbc.Driver";
    private static final String DATABASE_URL = "jdbc:mysql://localhost:3306/videogamereviews?verifyServerCertificate=false&useSSL=true";
    private static final String DATABASE_USERNAME = "root";
    private static final String DATABASE_PASSWORD ="random";

    private static final String HIBERNATE_DIALECT = "org.hibernate.dialect.MySQLDialect";
    private static final String HIBERNATE_SHOW_SQL = "true";
    private static final String ENTITYMANAGER_PACKAGES_TO_SCAN = "com.model";
    private static final String HIBERNATE_HBM2DDL_AUTO = "create-drop";
//  private static final String HIBERNATE_HBM2DDL_AUTO = "update";

    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName(DATABASE_DRIVER);
        dataSource.setUrl(DATABASE_URL);
        dataSource.setUsername(DATABASE_USERNAME);
        dataSource.setPassword(DATABASE_PASSWORD);
        return dataSource;
    }

    @Bean
    public CorsFilter corsFilter() {

        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        CorsConfiguration config = new CorsConfiguration();
        config.setAllowCredentials(true); // you USUALLY want this
        config.addAllowedOrigin("*");
        config.addAllowedHeader("*");
        config.addAllowedMethod("GET");
        config.addAllowedMethod("PUT");
        source.registerCorsConfiguration("/**", config);
        return new CorsFilter(source);
    }



    @Bean
    public LocalSessionFactoryBean sessionFactory() {
        LocalSessionFactoryBean sessionFactoryBean = new LocalSessionFactoryBean();
        sessionFactoryBean.setDataSource(dataSource());
        sessionFactoryBean.setPackagesToScan(ENTITYMANAGER_PACKAGES_TO_SCAN);
        sessionFactoryBean.setHibernateProperties(hibernateProperties());
        return sessionFactoryBean;
    }

    private Properties hibernateProperties() {
        Properties properties = new Properties();
        properties.put("hibernate.dialect", HIBERNATE_DIALECT);
        properties.put("hibernate.show_sql", HIBERNATE_SHOW_SQL);
        properties.put("hibernate.hbm2ddl.auto", HIBERNATE_HBM2DDL_AUTO);
        return properties;
    }

    @Bean
    public HibernateTransactionManager transactionManager() {
        HibernateTransactionManager transactionManager = new HibernateTransactionManager();
        transactionManager.setSessionFactory(sessionFactory().getObject());
        return transactionManager;
    }

    @Bean
    public ViewResolver getViewResolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/jsp/");
        resolver.setSuffix(".jsp");
        return resolver;
    }

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/css/**").addResourceLocations("/resources/");
    }
}

Spring我的控制器：ReviewController。Java语言

package com.controller;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.CrossOrigin;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.model.Review;
import com.service.ReviewService;

@RestController
@RequestMapping(value = "review")
@CrossOrigin(origins="http://localhost:8080")

public class ReviewController {

    @Autowired
    private ReviewService rs;

    @RequestMapping(value="/",method = RequestMethod.GET)
    public List<Review> getReviews() {
        return rs.getReviews();
    }

    @RequestMapping(value = "{id}", method = RequestMethod.GET)
    public Review showReviewWithId(@PathVariable long id) {
        return rs.getReviewById(id);

    }


    @RequestMapping(value = "{id}", method = RequestMethod.PUT)
    public String updateReviews(@PathVariable long id, @RequestBody Review review) {
        rs.updateReview(id,review);
        return "review updated";
    }

    @RequestMapping(value = "{id}", method = RequestMethod.DELETE)
    public String delete(@PathVariable long id) {
        rs.deleteReview(id);
        return "review deleted";
    }



    @RequestMapping(value="/",method = RequestMethod.POST)
    public String postReview(@RequestBody Review review) {
        rs.saveReview(review);
        return "review created";
    }

}



angular setup: app.js
    'use strict';

    var VideogameReviewsApp = angular.module('VideogameReviewsApp', ['ngRoute','ngResource']).
         config(['$routeProvider', function ($routeProvider) {
            $routeProvider.
                when('/', { controller: ReviewCtrl, templateUrl: 'review.html" target="_blank">html' }).
                otherwise({ redirectTo: '/' });
         }]);

    VideogameReviewsApp.factory('Review', function ($resource) {
        return $resource('http://localhost/videogamereviews/review/:id.json', { id: '@id' }, 


                { update: { method: 'PUT' } });
    });

    var ReviewCtrl = function ($scope,Review) {
        alert("haha");
        $scope.reviews = Review.query();
    };

在浏览器标题部分，我可以看到正在访问的URL是http://localhost/videogamereviews/review.json.那么为什么我得到一个404

回答提前感谢！艾希礼

Answer 1

您的url有冒号（：），这是导致问题的原因。只需在浏览器中粘贴您的资源uri（在浏览器控制台中检查有关响应的信息）或使用postman即可。从spring控制器获得的GET请求应如下所示：

• 对于所有ID:-“localhost/videogamereviews/review”

我还考虑localhost映射到localhost：{app server portno}.（即localhost:8080），上下文根是视频游戏视图。

Answer 2

根据审查，控制器审查应通过http://localhost/review具有给定id的审查应该可以通过http://localhost/review/YOUR_REVIEW_ID

所以你必须从请求url的末尾删除. json。

Answer 3

如果http://localhost/videogamereview/review/（id）返回预期的JSON，那么在Angular脚本中使用它。这意味着当您想要检索资源时，在uri中删除. json。http://localhost/videogamereview/review/（id）返回JSON资源，但http://localhost/videogamereview/review/（id）. json不是。