Java 配置为在端口8080上侦听的Tomcat连接器无法启动。端口可能已在使用中，或者连接器可能配置错误

刀类

应用程序.prprties

存储库

学生报名表
学生报名表
名字
姓
电子邮件
国家
选择国家
性
男性
女性
部分
编辑学生详细信息
名字
姓
性
男性
女性
电子邮件
部分
国家
选择国家
学生名单
IdFirst Name姓氏
六次修改
电子邮件国家
编辑删除
${student.id}
${student.firstName}
${student.lastName}
${student.sex}
${student.createdAt}
${student.email}
${student.section}
${student.country}

尝试在

StudentRepository

界面上添加

@Repository

注释，

@EnableJpaRepositories（“com.Repository”）

在

StudentApplication

类上添加

@ComponentScan（“com”）

---

由于

StudentApplication

类和其他类在不同的包中，因此Spring将无法自动连接

studentposition

和

StudentDAO

，因此问题就出现。

SpringBoot将自动扫描作为包子包的包中的存储库@SpringBootApplication注释类位于

---

因此，在您的情况下，因为它位于

com.application

中，所以您应该将存储库放在它下面。也许

com.application.repository

。否则，您需要像其他人建议的那样，在其他包中使用附加注释来启用组件扫描

你叫我做的我都做了，但没有改变。我完全搞砸了。没有构建不成功的尝试，但我没有得到结果。你说的都是对的，但我的问题没有solve@SushovanMallick你能详细说明你没有得到什么结果或者你在日志中看到了什么吗？当然可以。我想在web上部署我的第一个spring boot web应用程序。但我没有成功。我正在用日志发布整个应用程序。我昨天发布了整个应用程序。现在，我张贴的日志，我得到的每一次。

package com.dao;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.bin.Student;
import com.repository.StudentRepository;

@Service
public class StudentDAO {
    @Autowired
    StudentRepository studentRepository;

    /*to save an employee*/

    public Student save(Student std) {
        return studentRepository.save(std);
    }


    /* search all employees*/

    public List<Student> findAll(){
        return studentRepository.findAll();
    }


    /*get an employee by id*/
    public Student findOne(Integer id){
        return studentRepository.getOne(id);

    }


    /*delete an employee*/

    public void delete(Student std) {
        studentRepository.delete(std);
    }


}

package com.controller;

import java.util.ArrayList;
import java.util.List;

import javax.validation.Valid;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
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.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import com.bin.Student;
import com.dao.StudentDAO;

@Controller

public class StudentController {

    @Autowired
    private StudentDAO studentDao;

    @RequestMapping(value="/enroll",method=RequestMethod.GET)
    public String newRegistration(ModelMap model) {
        Student student = new Student();
        model.addAttribute("student",student);
        return "enroll";
    }

    @RequestMapping(value="/save",method=RequestMethod.POST)
    public String saveRegistration(@Valid Student student,BindingResult result,ModelMap model,RedirectAttributes redirectAttributes) {

        if(result.hasErrors()) {
            return "enroll";
        }

        studentDao.save(student);

        return "redirect:/viewstudents";
    }


    @RequestMapping(value="/viewstudents")
    public ModelAndView getAll() {

        List<Student> list=studentDao.findAll();
        return new ModelAndView("viewstudents","list",list);
    }


    @RequestMapping(value="/editstudent/{id}")
    public String edit (@PathVariable int id,ModelMap model) {

        Student student=studentDao.findOne(id);
        model.addAttribute("student",student);
        return "editstudent";
    }

    @RequestMapping(value="/editsave",method=RequestMethod.POST)
    public ModelAndView editsave(@ModelAttribute("student") Student p) {

        Student student=studentDao.findOne(p.getId());

        student.setFirstName(p.getFirstName());
        student.setLastName(p.getLastName());
        student.setCountry(p.getCountry());
        student.setEmail(p.getEmail());
        student.setSection(p.getSection());
        student.setSex(p.getSex());

        studentDao.save(student);
        return new ModelAndView("redirect:/viewstudents");
    }

    @RequestMapping(value="/deletestudent/{id}",method=RequestMethod.GET)
    public ModelAndView delete(@PathVariable int id) {
        Student student=studentDao.findOne(id);
        studentDao.delete(student);
        return new ModelAndView("redirect:/viewstudents");
    }



    @ModelAttribute("sections")
    public List<String> intializeSections(){
        List<String> sections = new ArrayList<String>();
        sections.add("Graduate");
        sections.add("Post Graduate");
        sections.add("Reasearch");
        return sections;
    }


    /*
     * Method used to populate the country list in view. Note that here you can
     * call external systems to provide real data.
     */
    @ModelAttribute("countries")
    public List<String> initializeCountries() {

        List<String> countries = new ArrayList<String>();
        countries.add("INDIA");
        countries.add("USA");
        countries.add("CANADA");
        countries.add("FRANCE");
        countries.add("GERMANY");
        countries.add("ITALY");
        countries.add("OTHER");
        return countries;
    }

}

package com.application;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.jpa.repository.config.EnableJpaAuditing;


@SpringBootApplication
@EnableJpaAuditing
public class StudentApplication {

    public static void main(String[] args) {
        SpringApplication.run(StudentApplication.class, args);

    }

}

spring.mvc.view.prefix : /WEB-INF/views/
spring.mvc.view.suffix: .jsp

## Spring DATASOURCE (DataSourceAutoConfiguration & DataSourceProperties)
spring.datasource.url = jdbc:mysql://localhost:3306/studentdb?allowPublicKeyRetrieval=true&useSSL=false
spring.datasource.username = root
spring.datasource.password = root


## Hibernate Properties
# The SQL dialect makes Hibernate generate better SQL for the chosen database
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

# Hibernate ddl auto (create, create-drop, validate, update)
spring.jpa.hibernate.ddl-auto = update

package com.repository;

import org.springframework.data.jpa.repository.JpaRepository;

import com.bin.Student;

public interface StudentRepository extends JpaRepository<Student, Integer> {

}