Question

对不起，我的冗长代码。但是我只是一个初学者。我想通过MongoDB学习Spring框架。

我遇到此异常，但我已经阅读了一些有关此问题的文章。但是，我不知道如何解决它。

我还没有创建应用程序配置。这是导致异常的原因吗？谁能帮我解决这个问题？我真的很感激。非常感谢...。

package com.mywebapp.dao;

import java.util.Date;
import java.util.List;

import org.bson.types.ObjectId;
import org.springframework.data.mongodb.repository.ReactiveMongoRepository;
import org.springframework.stereotype.Repository;

import com.mywebapp.model.Location;
import com.mywebapp.model.User;

@Repository
public interface UserRepository extends ReactiveMongoRepository<User, String>{

    List<User> findAllUsers();
    User findBy_id(ObjectId id);
    User findByUsername(String username);
    List<User> findByFirstName(String firstName);
    List<User> findByLastName(String lastName);
    User findByEmail(String email);
    List<User> findByDateOfBirth(Date dob);
    List<User> findByLocation(Location location);
}

    package com.mywebapp.controller;

import java.util.Date;
import java.util.List;

import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.mywebapp.model.Location;
import com.mywebapp.model.User;
import com.mywebapp.service.UserService;

@RestController
@RequestMapping("/user")
public class UserController {

    @Autowired
    private UserService userService;

    @RequestMapping(value="/",method = RequestMethod.GET)
    public List<User> getAllUser(){
        return userService.findAllUsers();
    }
    @RequestMapping(value="/{username}",method = RequestMethod.GET)
    public User getUserByUserName(@PathVariable("username") String userName){
        return userService.findByUserName(userName);
    }

    @RequestMapping(value="/{firstname}",method = RequestMethod.GET)
    public List<User> getUserByFirstName(@PathVariable("firstname") String firstName){
        return userService.findByFirstName(firstName);
    }

    @RequestMapping(value="/{lastname}",method = RequestMethod.GET)
    public List<User> getUserByLastName(@PathVariable("lastname") String lastName){
        return userService.findByLastName(lastName);
    }

    @RequestMapping(value="/{email}",method = RequestMethod.GET)
    public User getUserByEmail(@PathVariable("email") String email){
        return userService.findByEmail(email);
    }

    @SuppressWarnings("deprecation")
    @RequestMapping(value="/{dob}",method = RequestMethod.GET)
    public List<User> getUserByDOB(@PathVariable("dob") String dob) throws Exception{
        Date dateOfBirth = new Date(dob);
        return userService.findByDateOfBirth(dateOfBirth);
    }

    @RequestMapping(value="/{location}",method = RequestMethod.GET)
    public List<User> getUserByLocation(@PathVariable("location") Location location){
        return userService.findByLocation(location);
    }

    @RequestMapping(value= "/{id}", method = RequestMethod.GET)
    public User getUserById(@PathVariable("id") ObjectId id) {
        return userService.findById(id);
    }

}

    package com.mywebapp.service;

import java.util.Date;
import java.util.List;

import org.bson.types.ObjectId;
import org.springframework.stereotype.Service;

import com.mywebapp.dao.UserRepository;
import com.mywebapp.model.Location;
import com.mywebapp.model.User;

@Service
public class UserService {

    private UserRepository userRepo;

    public UserService() {

    }

    public List<User> findAllUsers() {
        return userRepo.findAllUsers();
    }

    public User findById(ObjectId id) {
        return userRepo.findBy_id(id);
    }

    public User findByUserName(String username){
        return userRepo.findByUsername(username);
    }

    public List<User> findByFirstName(String firstName){
        return userRepo.findByFirstName(firstName);
    }

    public List<User> findByLastName(String lastName){
        return userRepo.findByLastName(lastName);
    }

    public User findByEmail(String email){
        return userRepo.findByEmail(email);
    }

    public List<User> findByDateOfBirth(Date dob){
        return userRepo.findByDateOfBirth(dob);
    }

    public List<User> findByLocation(Location location){
        return userRepo.findByLocation(location);
    }
}


    <?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>MyWebApplication</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

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

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.5.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>10</java.version>
    </properties>

    <dependencies>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
        </dependency>

        <dependency>
            <groupId>org.mongodb</groupId>
            <artifactId>mongo-java-driver</artifactId>
            <version>2.12.3</version>
        </dependency>

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

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

        <dependency>
            <groupId>io.projectreactor</groupId>
            <artifactId>reactor-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

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


</project>

Answer 1

在资源文件夹下的application.properties中的属性下面定义，替换您的实际值。如果默认安装了mongodb且没有用户名/密码，则不需要定义用户名和密码属性。 >

spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
spring.data.mongodb.username=*********
spring.data.mongodb.password=*********
spring.data.mongodb.database=demo

更新

更新存储库以扩展MongoRepository

@Repository
public interface UserRepository extends MongoRepository<User, ObjectId> 
{

从存储库中删除List<User> findAllUsers();。

将服务中的所有方法更改为以下

public List<User> findAllUsers() {
    return userRepo.findAll();
}

com.mongodb.MongoSocketReadException：过早到达流的结尾..............如何解决

1 个答案: