在 Spring Boot 中使用重定向 [英] Using Redirect in Spring Boot

问题描述

我在 Spring Boot 应用程序中使用重定向功能时遇到问题.如我下面的代码所示，我返回重定向:/aucConfirm/"，但是当我启动它时，我收到此应用程序没有显式映射"错误.

@Controller@RequestMapping("/")公共类欢迎控制器{@自动连线AuctionItemRepository aucRepository;//通过 application.properties 注入@Value("${welcome.message:test}")private String message = "Hello World";@RequestMapping(value = "/")公共字符串欢迎(地图<字符串，对象>模型){model.put("message", this.message);返回欢迎"；}@RequestMapping(value = "/sell", method = RequestMethod.GET)公共字符串 addAuction(模型模型，HttpServletRequest 请求){model.addAttribute("newAuction", new AuctionItem());return "NewAuction";}@RequestMapping(value = "/sell", method = RequestMethod.POST)public String saveAuction(@ModelAttribute AuctionItem newAuction, RedirectAttributes 属性){返回重定向:/aucConfirm"；}@RequestMapping(value = "/aucConfirm", method = RequestMethod.GET)公共字符串确认新拍卖(模型模型，HttpServletRequest 请求){返回 "aucConfirm";}}

这是我当前的配置类 -

@SpringBootApplication@ComponentScan@EnableJpaRepositories("全部")@EntityScan("全部")公共类 AuctionWebApplication 扩展 SpringBootServletInitializer {@覆盖受保护的 SpringApplicationBuilder 配置(SpringApplicationBuilder 应用程序){返回 application.sources(AuctionWebApplication.class);}public static void main(String[] args) 抛出异常 {SpringApplication.run(AuctionWebApplication.class, args);}@豆数据源数据源(){DriverManagerDataSource dataSource = new DriverManagerDataSource();dataSource.setDriverClassName("com.mysql.jdbc.Driver");dataSource.setUrl("jdbc:mysql://localhost:3306/auctiondb?zeroDateTimeBehavior=convertToNull");dataSource.setUsername("root");dataSource.setPassword("toor");返回数据源；}@豆public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) {LocalContainerEntityManagerFactoryBean entityManager = new LocalContainerEntityManagerFactoryBean();entityManager.setDataSource(dataSource);entityManager.setJpaVendorAdapter(new HibernateJpaVendorAdapter());entityManager.setPackagesToScan("All");属性 jpaProperties = new Properties();jpaProperties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");jpaProperties.setProperty("hibernate.hbm2ddl.auto", "更新");jpaProperties.setProperty("hibernate.id.new_generator_mappings", "false");entityManager.setJpaProperties(jpaProperties);返回实体管理器；}

}

更新

它可能与我试图建立重新提交的jsp页面有关吗?我这里有一个 mvc 表单 -

当用户点击下一个按钮时，它应该点击redirect:/aucConfirm" -

<button type="submit" name="submit" class="btn btn-success" form="addNewAuc">Next</button>

这段代码有什么问题吗?在这一点上，我的想法不多了.我是否需要向我的 Spring Boot 配置类添加任何内容才能使其正常工作?- 请帮忙！

更新 2

当我在此表单中输入详细信息并选择下一步时，我希望它重定向到-

根本不重定向并保留链接 http://localhost:8080/AuctionWebsite/sell

http://localhost:8080/AuctionWebsite/aucConfirm 手动输入时有效

此时我有点绝望，非常感谢您的帮助.

解决方案

使用此代码

redirect:aucConfirm

代替

redirect:/aucConfirm

根据您更新的问题.好像

<块引用>

此应用程序没有显式映射"错误

用于/error url;

实际错误是

<块引用>

对象auctionItem"的验证失败

所以问题不在于重定向，而是与验证相关的其他问题.您可能会在控制台日志中发现特定错误.

Im having trouble using redirect functionality within my spring boot application. As shown in my code below im returning "redirect:/aucConfirm/" but when i initiate this i get a "This application has no explicit mapping" error.

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

    @Autowired
    AuctionItemRepository aucRepository;

// inject via application.properties
@Value("${welcome.message:test}")
private String message = "Hello World";

@RequestMapping(value = "/")
public String welcome(Map<String, Object> model) {
    model.put("message", this.message);
    return "welcome";
}


    @RequestMapping(value = "/sell", method = RequestMethod.GET)
    public String addAuction(Model model, HttpServletRequest request) {


        model.addAttribute("newAuction", new AuctionItem());

        return "NewAuction";
    }

    @RequestMapping(value = "/sell", method = RequestMethod.POST)
    public String saveAuction(@ModelAttribute AuctionItem newAuction, RedirectAttributes attributes){


        return "redirect:/aucConfirm";
    }

    @RequestMapping(value = "/aucConfirm", method = RequestMethod.GET)
    public String confirmNewAuction(Model model, HttpServletRequest request) {


        return "aucConfirm";
    }
}

This is my current configuration class -

@SpringBootApplication
@ComponentScan
@EnableJpaRepositories("All")
@EntityScan("All")
public class AuctionWebApplication extends SpringBootServletInitializer  {

@Override
protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
    return application.sources(AuctionWebApplication.class);
}

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

    @Bean
    DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("com.mysql.jdbc.Driver");
        dataSource.setUrl("jdbc:mysql://localhost:3306/auctiondb?zeroDateTimeBehavior=convertToNull");
        dataSource.setUsername("root");
        dataSource.setPassword("toor");

        return dataSource;
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) {
        LocalContainerEntityManagerFactoryBean entityManager = new LocalContainerEntityManagerFactoryBean();
        entityManager.setDataSource(dataSource);
        entityManager.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
        entityManager.setPackagesToScan("All");

        Properties jpaProperties = new Properties();
        jpaProperties.setProperty("hibernate.dialect", "org.hibernate.dialect.MySQLDialect");
        jpaProperties.setProperty("hibernate.hbm2ddl.auto", "update");
        jpaProperties.setProperty("hibernate.id.new_generator_mappings", "false");
        entityManager.setJpaProperties(jpaProperties);

        return entityManager;
    }

}

Update

Could it possibly have something to do with my jsp page that im trying to establish the recommit? I have a mvc form here -

<mvc:form class="form-inline" action="${action}" method="post" modelAttribute="newAuction" id="addNewAuc">

and when the user hits the next button it should hit the "redirect:/aucConfirm" -

<button type="submit" name="submit" class="btn btn-success" form="addNewAuc">Next</button>

Is there anything wrong with this code? Im running out of ideas at this point. Do i need to add anything to my spring boot configuration class to get it working? - Please help!

Update 2

http://localhost:8080/AuctionWebsite/sell

When i enter details int this form and select next i want it to redirect to- http://localhost:8080/AuctionWebsite/aucConfirm

However this is what appears-

not redirecting at all and remaining with link http://localhost:8080/AuctionWebsite/sell

http://localhost:8080/AuctionWebsite/aucConfirm works when entered manually

Im getting a little bit desperate at this point, would really appreciate any help.

解决方案

Use this code

redirect:aucConfirm

Instead of

redirect:/aucConfirm

As per your updated question. it seems that

"This application has no explicit mapping" error

Is for /error url;

The actual error is

Validation failed for object 'auctionItem'

So problem is not with redirection , it is something else related to validation. You may find specific error on console log.

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