从mongodb服务器检索数据时面临错误

Question

服务器成功启动并接受数据,但当我检索数据时,却出现以下错误：

O.a.c.c.[.[/].[dispatcherServlet]:路径为[]的上下文
中servlet[dispatcherServlet]的servlet.Service（）引发异常[请求处理失败；嵌套异常为
org.springframework.data.MongoDb.UncategorizedMongoDbException：查询失败，错误代码为2，错误
消息“field”locale“在服务器localhost:27017上的{locale:”tax“}”中无效；嵌套异常为
com.mongoDb.MongoQueryException：查询失败，

com.mongodb.mongoqueryexception：查询失败，错误代码为2，错误消息“field”locale“是
在服务器localhost：27017上的{locale：”tax“}”中无效

null

tax.java

package net.example.TaxEngine.Model;

import org.springframework.data.annotation.Id;
import org.springframework.data.mongodb.core.mapping.Document;

@Document(collation = "Tax")
public class Tax {

    @Id
    private String Name;

    public String getName() {
        return Name;
    }
    
    

    public void setName(String name) {
        this.Name = name;
    }
}

taxrepo.java

    package net.example.TaxEngine.Repository;
    import org.springframework.data.mongodb.repository.MongoRepository;
    import net.example.TaxEngine.Model.Tax;

    public interface TaxRepo extends MongoRepository<Tax, String> {
         public Tax findByname(String Name);
    }

TaxController.java

   package net.example.TaxEngine.Resources;

   import java.util.List;

   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.web.bind.annotation.GetMapping;
   import org.springframework.web.bind.annotation.PathVariable;
   import org.springframework.web.bind.annotation.PostMapping;
   import org.springframework.web.bind.annotation.RequestBody;
   // import org.springframework.web.bind.annotation.RequestParam;
   import org.springframework.web.bind.annotation.RestController;
   import net.example.TaxEngine.Model.Tax;
   import net.example.TaxEngine.Repository.TaxRepo;

   @RestController
   public class TaxController {
    
     @Autowired
    private TaxRepo Repo;
    
     @PostMapping("/addName")
     public String SaveName(@RequestBody Tax name) {
        Repo.save(name);
        
        return "Added Name:" +name.getName();
     }
    
     @GetMapping("/AllNames")
     public List<Tax> getTaxs(){
        return Repo.findAll();
     }
    
     @GetMapping("/message/[name]")
     public String getTax(@PathVariable String name) {
         return "Hello:" +Repo.findById(name);
     }
}

TaxEngineApplication.java

package net.example.TaxEngine;

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

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

应用程序属性：

 spring.data.mongodb.uri=mongodb://localhost:27017/test

Answer 1

您的代码中有一个小错误：

@Document(collation = "Tax")
public class Tax {

您使用的是排序规则，您应该使用集合来引用Mongo DB中的数据结构。

@Document(collection = "Tax")
public class Tax {

要阅读有关校对的内容，请查看mongo官方文档