springboot整合jpa和jpa案例CURD

整合jpa

1.什么是JPA

首先JPA的全称叫做Java Persistence API，
JPA是一个基于O/R映射的标准规范，在这个规范中，
JPA只定义标准规则，不提供实现，使用者则需要按照规范中定义的方式来使用。
目前JPA的主要实现有Hibernate、EclipseLink、OpenJPA等，事实上，
由于Hibernate在数据访问解决技术领域的绝对霸主地位，

JPA的标准基本是由Hibernate来主导的

2.JPA核心组件

EntityManagerFactory: 创建和管理多个EntityManager实例
EntityManager: 接口，管理对象的操作(create, update, delete, Query)
Entity: 持久化对象，在数据库中以record存储
EntityTransaction: 与EntityManager一对一
Persistence: 包含获取EntityManagerFactory实例的静态方法
Query: 运营商必须实现的接口，获取满足creteria的关系对象（relational object）

3.优缺点

优点：可持久化Java对象、 使用简单、规范标准化、 事务性、大数据量。JPA应该用在需要标准的基于Java的持久性解决方案的时候。

缺点：是其需要一个实现了其自身的提供程序，JPA被定义成只能在关系数据库上工作。

如果你的持久化解决方案需要扩展到其他类型的数据存储上，比如XML数据库上的话，则JPA就不能够用来解决你的持久性问题了。

JPA也提供一个完整的ORM解决方案，并提供对诸如继承和多态一类的面向对象编程特性的支持，不过它的性能则取决于持久性提供程序

4.简单实现

导入相关pom依赖

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

application.yml文件配置

spring:
  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true

自动建表相关代码

package com.ly.springboot02.model;

import lombok.Data;

import javax.persistence.*;

/**
 * @author毅哥哥
 * @site
 * @company
 * @create  2019-11-13 16:26
 */
@Data
@Entity
@Table(name = "t_springboot_book_2019")
public class HBook {
    @Id
    @GeneratedValue
    private Integer bid;
    @Column(length = 100)
    private String bname;
    @Column
    private Float price;
}

数据库自动建表截图
会创建一个序列以及t_springboot_book_2019表

jpa值增删改查：继承**JpaRepository**里面就有他的增删查改就好了，当然也可以自定义SQL

package com.hu.springboot02.mapper;

import com.hu.springboot02.model.HBook;
import org.springframework.data.jpa.repository.JpaRepository;

/**
 * @authorhu
 * @site
 * @company
 * @create  2019-11-13 16:31
 */
public interface HBookDao extends JpaRepository<HBook,Integer> {
}

controller层

package com.hu.springboot02.controller;

import com.hu.springboot02.mapper.HBookDao;
import com.hu.springboot02.model.HBook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

/**
 * @authorhu
 * @site
 * @company
 * @create  2019-11-13 16:32
 */
@RestController
@RequestMapping("/jpa")
public class JpaController {
    @Autowired
    private HBookDao jpaDao;

    @RequestMapping("/add")
    public String add(HBook book){
        jpaDao.save(book);
        return "success";
    }

    @RequestMapping("/edit")
    public String edit(HBook book){
        jpaDao.save(book);
        return "success";
    }

    @RequestMapping("/del")
    public String del(HBook book){
        jpaDao.delete(book);
        return "success";
    }

//    @RequestMapping("/getOne")
//    public HBook getOne(Integer bid){
////        会出现懒加载问题：org.hibernate.LazyInitializationException: could not initialize proxy - no Session
////        return jpaDao.getOne(bid);
//        return HBookDao.findById(bid).get();
//    }

    @RequestMapping("/getAll")
    public List<HBook> getAll(){
        return jpaDao.findAll();
    }
}

浏览器输入请求进行测试结果：

案例（分页以及上传图片）

js,css
链接：https://pan.baidu.com/s/1E1Kb5izY9u0FmynOh5ft6A
提取码：4ztv

本次案例采取的是spring data jpa和bootstrap3来完成的，并没有使用github提供的分页插件Pagehelper，pagehelper与SSM配合分页在前面博客已经有所讲解。
工程创建：

pom依赖：

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.2.1.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.hu</groupId>
    <artifactId>springboot03</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot03</name>
    <description>Demo project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
        <mysql.version>5.1.44</mysql.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jdbc</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>${mysql.version}</version>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintage</groupId>
                    <artifactId>junit-vintage-engine</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.1</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
        </dependency>


    </dependencies>

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

</project>

application.yml文件配置

server:
  servlet:
    context-path: /
  port: 80
spring:
  jpa:
    hibernate:
      ddl-auto: update
    show-sql: true
  datasource:
    type: com.alibaba.druid.pool.DruidDataSource
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/tb_stu?useUnicode=true&characterEncoding=utf8
    username: root
    password: 123
    druid:
      initial-size: 5
      min-idle: 5
      max-active: 20
      max-wait: 60000
      time-between-eviction-runs-millis: 60000
      min-evictable-idle-time-millis: 30000
      validation-query: SELECT 1 FROM DUAL
      test-while-idle: true
      test-on-borrow: true
      test-on-return: false
      pool-prepared-statements: true
      max-pool-prepared-statement-per-connection-size: 20
      filter:
        stat:
          merge-sql: true
          slow-sql-millis: 5000
      web-stat-filter:
        enabled: true
        url-pattern: /*
        exclusions: "*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*"
        session-stat-enable: true
        session-stat-max-count: 100
      stat-view-servlet:
        enabled: true
        url-pattern: /druid/*
        reset-enable: true
        login-username: admin
        login-password: admin
        allow: 127.0.0.1
  thymeleaf:
    cache: false

  # 解决图片上传大小限制问题，也可采取配置类
  servlet:
    multipart:
      max-file-size: 20MB
      max-request-size: 60MB

启动程序：

package com.hu.springboot03;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@EnableTransactionManagement
@SpringBootApplication
public class Springboot03Application {

    public static void main(String[] args) {
        SpringApplication.run(Springboot03Application.class, args);
    }

}

目录结构：

上传文件映射配置类MyWebAppConfigurer

package com.hu.springboot03.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

/**
 * 资源映射路径
 */
@Configuration
public class MyWebAppConfigurer extends WebMvcConfigurationSupport {
    @Override
    protected void addResourceHandlers(ResourceHandlerRegistry registry) {
        registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
        registry.addResourceHandler("/uploadImages/**").addResourceLocations("file:E:/temp/");
        super.addResourceHandlers(registry);
    }
}

StringUtils：

package com.hu.springboot03.util;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;

public class StringUtils {
	// 私有的构造方法，保护此类不能在外部实例化
	private StringUtils() {
	}

	/**
	 * 如果字符串等于null或去空格后等于""，则返回true，否则返回false
	 * 
	 * @param s
	 * @return
	 */
	public static boolean isBlank(String s) {
		boolean b = false;
		if (null == s || s.trim().equals("")) {
			b = true;
		}
		return b;
	}
	
	/**
	 * 如果字符串不等于null或去空格后不等于""，则返回true，否则返回false
	 * 
	 * @param s
	 * @return
	 */
	public static boolean isNotBlank(String s) {
		return !isBlank(s);
	}

	/**
	 * set集合转string
	 * @param hasPerms
	 * @return
	 */
	public static String SetToString(Set hasPerms){
		return  Arrays.toString(hasPerms.toArray()).replaceAll(" ", "").replace("[", "").replace("]", "");
	}

	/**
	 * 转换成模糊查询所需参数
	 * @param before
	 * @return
	 */
	public static String toLikeStr(String before){
		return isBlank(before) ? null : "%"+before+"%";
	}

	/**
	 *	将图片的服务器访问地址转换为真实存放地址
	 * @param imgpath	图片访问地址（http://localhost:8080/uploadImage/2019/01/26/20190126000000.jpg）
	 * @param serverDir	uploadImage
	 * @param realDir	E:/temp/
	 * @return
	 */
	public static String serverPath2realPath(String imgpath, String serverDir, String realDir) {
		imgpath = imgpath.substring(imgpath.indexOf(serverDir));
		return imgpath.replace(serverDir,realDir);
	}

	/**
	 * 过滤掉集合里的空格
	 * @param list
	 * @return
	 */
	public static List<String> filterWhite(List<String> list){
		List<String> resultList=new ArrayList<String>();
		for(String l:list){
			if(isNotBlank(l)){
				resultList.add(l);
			}
		}
		return resultList;
	}

	/**
	 * 从html中提取纯文本
	 * @param strHtml
	 * @return
	 */
	public static String html2Text(String strHtml) {
		String txtcontent = strHtml.replaceAll("]+>", ""); //剔出的标签
		txtcontent = txtcontent.replaceAll("\\s*|\t|\r|\n", "");//去除字符串中的空格,回车,换行符,制表符
		return txtcontent;
	}

	public static void main(String[] args) {
	}
}

PageBean

package com.hu.springboot03.util;

import javax.servlet.http.HttpServletRequest;
import java.util.Map;

/**
 * 分页工具类
 */
public class PageBean {

	private int page = 1;// 页码

	private int rows = 3;// 页大小

	private int total = 0;// 总记录数

	private boolean pagination = true;// 是否分页
	
//	保存上次查询的参数
	private Map<String, String[]> paramMap;
//	保存上次查询的url
	private String url;
	
	public void setRequest(HttpServletRequest request) {
		String page = request.getParameter("page");
		String rows = request.getParameter("offset");
		String pagination = request.getParameter("pagination");
		this.setPage(page);
		this.setRows(rows);
		this.setPagination(pagination);
		this.setUrl(request.getRequestURL().toString());
		this.setParamMap(request.getParameterMap());
	}

	public PageBean() {
		super();
	}

	public Map<String, String[]> getParamMap() {
		return paramMap;
	}

	public void setParamMap(Map<String, String[]> paramMap) {
		this.paramMap = paramMap;
	}

	public String getUrl() {
		return url;
	}

	public void setUrl(String url) {
		this.url = url;
	}

	public int getPage() {
		return page;
	}

	public void setPage(int page) {
		this.page = page;
	}
	
	public void setPage(String page) {
		if(StringUtils.isNotBlank(page)) {
			this.page = Integer.parseInt(page);
		}
	}

	public int getRows() {
		return rows;
	}

	public void setRows(String rows) {
		if(StringUtils.isNotBlank(rows)) {
			this.rows = Integer.parseInt(rows);
		}
	}

	public int getTotal() {
		return total;
	}

	public void setTotal(int total) {
		this.total = total;
	}

	public void setTotal(String total) {
		if(StringUtils.isNotBlank(total)) {
			this.total = Integer.parseInt(total);
		}
	}

	public boolean isPagination() {
		return pagination;
	}

	public void setPagination(boolean pagination) {
		this.pagination = pagination;
	}
	
	public void setPagination(String pagination) {
		if(StringUtils.isNotBlank(pagination) && "false".equals(pagination)) {
			this.pagination = Boolean.parseBoolean(pagination);
		}
	}
	
	/**
	 * 最大页
	 * @return
	 */
	public int getMaxPage() {
		int max = this.total/this.rows;
		if(this.total % this.rows !=0) {
			max ++ ;
		}
		return max;
	}
	
	/**
	 * 下一页
	 * @return
	 */
	public int getNextPage() {
		int nextPage = this.page + 1;
		if(nextPage > this.getMaxPage()) {
			nextPage = this.getMaxPage();
		}
		return nextPage;
	}
	
	/**
	 * 上一页
	 * @return
	 */
	public int getPreviousPage() {
		int previousPage = this.page -1;
		if(previousPage < 1) {
			previousPage = 1;
		}
		return previousPage;
	}
		

	/**
	 * 获得起始记录的下标
	 * 
	 * @return
	 */
	public int getStartIndex() {
		return (this.page - 1) * this.rows;
	}

	@Override
	public String toString() {
		return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", pagination=" + pagination + "]";
	}
}

PageUtil

package com.hu.springboot03.util;

import java.util.Map;
import java.util.Set;

/**
 *
 * 基于bootstrap3生成分页代码
 */
public class PageUtil {
    public static String createPageCode(PageBean pageBean) {
        StringBuffer sb = new StringBuffer();
        /*
         * 拼接向后台提交数据的form表单
         * 	注意：拼接的form表单中的page参数是变化的，所以不需要保留上一次请求的值
         */
        sb.append("
");
        sb.append("");
        Map<String, String[]> parameterMap = pageBean.getParamMap();
        if(parameterMap != null && parameterMap.size() > 0) {
            Set<Map.Entry<String, String[]>> entrySet = parameterMap.entrySet();
            for (Map.Entry<String, String[]> entry : entrySet) {
                if(!"page".equals(entry.getKey())) {
                    String[] values = entry.getValue();
                    for (String val : values) {
                        sb.append("");
                    }
                }
            }
        }
        sb.append(""
);

        if(pageBean.getTotal()==0){
            return "未查询到数据";
        }else{
            sb.append("
首页
");
            if(pageBean.getPage()>1){
                sb.append("
上一页
");
            }else{
                sb.append("
上一页
");
            }
            for(int i=pageBean.getPage()-1;i<=pageBean.getPage()+1;i++){
                if(i<1||i>pageBean.getMaxPage()){
                    continue;
                }
                if(i==pageBean.getPage()){
                    sb.append("
"+i+"
");
                }else{
                    sb.append("
"+i+"
");
                }
            }
            if(pageBean.getPage()<pageBean.getMaxPage()){
                sb.append("
下一页
");
            }else{
                sb.append("
下一页
");
            }
            sb.append("
尾页
");
        }

        /*
         * 给分页条添加与后台交互的js代码
         */
        sb.append("");
        return sb.toString();
    }
}

实体类entity，

package com.hu.springboot03.entity;

import lombok.ToString;

import javax.persistence.*;

@Table(name = "t_springboot_teacher")
@ToString
public class Teacher {
    @Id
    @GeneratedValue
    private Integer tid;
    @Column(length = 16)
    private String tname;
    @Column(length = 4)
    private String sex;
    @Column(length = 100)
    private String description;
    @Column(length = 200)
    private String imagePath;

    public Integer getTid() {
        return tid;
    }

    public void setTid(Integer tid) {
        this.tid = tid;
    }

    public String getTname() {
        return tname;
    }

    public void setTname(String tname) {
        this.tname = tname;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }

    public String getDescription() {
        return description;
    }

    public void setDescription(String description) {
        this.description = description;
    }

    public String getImagePath() {
        return imagePath;
    }

    public void setImagePath(String imagePath) {
        this.imagePath = imagePath;
    }
}

dao层

package com.hu.springboot03.dao;

import com.hu.springboot03.entity.Teacher;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;

/**
 * 只要继承JpaRepository，通常所用的增删查改方法都有
 *  第一个参数：操作的实体类
 *  第二个参数：实体类对应数据表的主键
 *
 *  要使用高级查询必须继承
 * org.springframework.data.jpa.repository.JpaSpecificationExecutor接口
 */
public interface TeacherDao extends JpaRepository<Teacher, Integer>, JpaSpecificationExecutor<Teacher> {
}

service层

package com.hu.springboot03.server.impl;

import com.hu.springboot03.dao.TeacherDao;
import com.hu.springboot03.entity.Teacher;
import com.hu.springboot03.server.TeacherService;
import com.hu.springboot03.util.PageBean;
import com.hu.springboot03.util.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.domain.Specification;
import org.springframework.stereotype.Service;

import javax.persistence.criteria.CriteriaBuilder;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;

@Service
public class TeacherServiceImpl implements TeacherService {
    @Autowired
    private TeacherDao teacherDao;
    @Override
    public Teacher save(Teacher teacher) {
        return teacherDao.save(teacher);
    }

    @Override
    public void deleteById(Integer id) {
        teacherDao.deleteById(id);
    }

    @Override
    public Teacher findById(Integer id) {
        return teacherDao.findById(id).get();
    }

    @Override
    public Page<Teacher> listPager(Teacher teacher, PageBean pageBean) {
//        jpa的Pageable分页是从0页码开始
        Pageable pageable = PageRequest.of(pageBean.getPage()-1, pageBean.getRows());
        return teacherDao.findAll(new Specification<Teacher>() {
            @Override
            public Predicate toPredicate(Root<Teacher> root, CriteriaQuery<?> criteriaQuery, CriteriaBuilder criteriaBuilder) {
                Predicate predicate = criteriaBuilder.conjunction();
                if(teacher != null){
                    if(StringUtils.isNotBlank(teacher.getTname())){
                        predicate.getExpressions().add(criteriaBuilder.like(root.get("tname"),"%"+teacher.getTname()+"%"));
                    }
                }
                return predicate;
            }
        },pageable);
    }
}

controller层

package com.hu.springboot03.controller;

import com.hu.springboot03.entity.Teacher;
import com.hu.springboot03.server.TeacherService;
import com.hu.springboot03.util.PageBean;
import com.hu.springboot03.util.PageUtil;
import com.hu.springboot03.util.StringUtils;
import org.apache.commons.io.FileUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import java.io.File;
import java.io.IOException;


@Controller
@RequestMapping("/teacher")
public class TeacherController {
    @Autowired
    private TeacherService teacherService;

    @RequestMapping("/listPager")
    public ModelAndView list(Teacher teacher, HttpServletRequest request){
        PageBean pageBean = new PageBean();
        pageBean.setRequest(request);
        ModelAndView modelAndView = new ModelAndView();
        Page<Teacher> teachers = teacherService.listPager(teacher, pageBean);
        modelAndView.addObject("teachers",teachers.getContent());
        pageBean.setTotal(teachers.getTotalElements()+"");
        modelAndView.addObject("pageCode", PageUtil.createPageCode(pageBean)/*.replaceAll("<","<").replaceAll(">:",">")*/);
        modelAndView.setViewName("list");
        return modelAndView;
    }

    @RequestMapping("/toEdit")
    public ModelAndView toEdit(Teacher teacher){
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.setViewName("edit");
        modelAndView.addObject("sexArr",new String[]{"男","女"});
        if(!(teacher.getTid() == null || "".equals(teacher.getTid()))) {
            Teacher t = teacherService.findById(teacher.getTid());
            modelAndView.addObject("teacher", t);
        }
        return modelAndView;
    }

    @RequestMapping("/add")
    public String add(Teacher teacher, MultipartFile image){
        try {
            String diskPath = "E://temp/"+image.getOriginalFilename();
            String serverPath = "/uploadImages/"+image.getOriginalFilename();
            if(StringUtils.isNotBlank(image.getOriginalFilename())){
                FileUtils.copyInputStreamToFile(image.getInputStream(),new File(diskPath));
                teacher.setImagePath(serverPath);
            }
            teacherService.save(teacher);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return "redirect:/teacher/listPager";
    }


    @RequestMapping("/edit")
    public String edit(Teacher teacher, MultipartFile image){
        String diskPath = "E://temp/"+image.getOriginalFilename();
        String serverPath = "/uploadImages/"+image.getOriginalFilename();
        if(StringUtils.isNotBlank(image.getOriginalFilename())){
            try {
                FileUtils.copyInputStreamToFile(image.getInputStream(),new File(diskPath));
                teacher.setImagePath(serverPath);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        teacherService.save(teacher);
        return "redirect:/teacher/listPager";
    }

    @RequestMapping("/del/{bid}")
    public String del(@PathVariable(value = "bid") Integer bid){
        teacherService.deleteById(bid);
        return "redirect:/teacher/listPager";
    }
}

页面层
list.html

<!DOCTYPE html>
<html lang="en">
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>书籍列表</title>
    <script type="text/javascript" th:src="@{/static/js/xxx.js}"></script>
    <link rel="stylesheet" th:href="@{/static/js/bootstrap3/css/bootstrap.min.css}">
    <link rel="stylesheet" th:href="@{/static/js/bootstrap3/css/bootstrap-theme.min.css}">
    <script type="text/javascript" th:src="@{/static/js/bootstrap3/js/jquery-1.11.2.min.js}"></script>
    <script type="text/javascript" th:src="@{/static/js/bootstrap3/js/bootstrap.min.js}"></script>
</head>
<body>
<form th:action="@{/teacher/listPager}" method="post">
    书籍名称： <input type="text" name="tname" />
    <input type="submit" value="提交"/>
</form>
<a th:href="@{/teacher/toEdit}">新增</a>
<table border="1px" width="600px">
    <thead>
    <tr>
        <td>ID</td>
        <td>头像</td>
        <td>姓名</td>
        <td>性别</td>
        <td>简介</td>
        <td>操作</td>
    </tr>
    </thead>
    <tbody>
    <tr th:each="teacher : ${teachers}">
        <td th:text="${teacher.tid}"></td>
        <td><img style="width: 60px;height: 60px;" id="imgshow" th:src="${teacher.imagePath}" th:alt="${teacher.tname}"/></td>
        <!--<td th:text="${teacher.imagePath}"></td>-->
        <td th:text="${teacher.tname}"></td>
        <td th:text="${teacher.sex}"></td>
        <td th:text="${teacher.description}"></td>
        <td>
            <a th:href="@{'/teacher/del/'+${teacher.tid}}">删除</a>
            <a th:href="@{'/teacher/toEdit?tid='+${teacher.tid}}">修改</a>
        </td>
    </tr>
    </tbody>
</table>


<nav>
    <ul class="pagination pagination-sm" th:utext="${pageCode}">
    </ul>

    <!--<ul class="pagination pagination-sm">-->
    <!--<form id='pageBeanForm' action='http://localhost:8080/springboot/teacher/listPager' method='post'><input type='hidden' name='page'></form>-->
    <!--<li><a href='javascript:gotoPage(1)'>首页</a></li>-->
    <!--<li class='disabled'><a href='javascript:gotoPage(1)'>上一页</a></li>-->
    <!--<li class='active'><a href='#'>1</a></li>-->
    <!--<li><a href='javascript:gotoPage(2)'>2</a></li>-->
    <!--<li><a href='javascript:gotoPage(2)'>下一页</a></li>-->
    <!--<li><a href='javascript:gotoPage(4)'>尾页</a></li>-->
    <!--<script type='text/javascript'>	function gotoPage(page) {	document.getElementById('pageBeanForm').page.value = page; document.getElementById('pageBeanForm').submit();	}	function skipPage() {	var page = document.getElementById('skipPage').value;	if(!page || isNaN(page) || parseInt(page)<1 || parseInt(page)>4){ alert('请输入1~N的数字');	return;	}	gotoPage(page);	}</script>-->
    <!--</ul>-->
</nav>
</body>
</html>

edit.html

<!DOCTYPE html>
<html lang="en">
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>用户编辑界面</title>

    <script type="text/javascript">
        function preShow() {

        }
    </script>
</head>
<body>

<form th:action="@{${teacher.tid} ? '/teacher/edit' : '/teacher/add'}" method="post" enctype="multipart/form-data">
    <input type="hidden" name="tid" th:value="${teacher.tid}" />
    <input type="hidden" name="imagePath" th:value="${teacher.imagePath}" />
    <img id="imgshow" src="" alt=""/>
    <input type="file" name="image" onchange="preShow();"></br>
    教员名称： <input type="text" name="tname" th:value="${teacher.tname}" /></br>
    教员描述： <input type="text" name="description" th:value="${teacher.description}" /></br>
    单选回显
    <input type="radio" name="sex"
           th:each ="s:${sexArr}"
           th:value="${s}"
           th:text ="${s}"
           th:attr ="checked=${s == teacher.sex}">

    <input type="submit" value="提交"/>
</form>

</body>
</html>

效果：