springboot对JPA的支持

springboot之jpa支持

导入相关pom依赖

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

配置application.yml文件

 server:
   port: 80
   servlet:
     context-path: /
 spring:
   jpa:
     hibernate:
       ddl-auto: update
     show-sql: true
   datasource:
     #1.JDBC
     type: com.alibaba.druid.pool.DruidDataSource
     driver-class-name: com.mysql.jdbc.Driver
     url: jdbc:mysql://localhost:3306/xufanqi?useUnicode=true&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
     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

    servlet:
      multipart:
        max-file-size: 20MB
        max-request-size: 60MB

自动建表相关代码

 @Entity
 @Table(name = "t_springboot_2019")
 public class Book {
     @Id
     @GeneratedValue
     private Integer bid;
     @Column(length = 100)
     private String bname;
     @Column
     private Float price;

自动在数据库建一个

t_springboot_book表

jpa值增删改查

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

 package com.javaqi.springboot03.repository;

 import com.yuan.springboot03.entity.Book;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;

 @Repository
 public interface BookRepository extends JpaRepository<Book, Integer> {
 }

controller层

BookController 

 package com.javaqi.springboot03.controller;

 import com.javaqi.springboot03.entity.Book;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;

 import java.util.List;

 @RestController
 @RequestMapping("/book")
 public class BookController {
     @Autowired
     private JpaRepository jpaDao;

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

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

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

     @RequestMapping("/getOne")
     public Book 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 (Book)jpaDao.findById(bid).get();
     }

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

浏览器访问效果

Springboot+bootstrap界面版之增删改查及图片上传

spring data jpa和bootstrap3来完成

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

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

 </project>

配置application.yml

 server:
   port: 80
   servlet:
     context-path: /
 spring:
   jpa:
     hibernate:
       ddl-auto: update
     show-sql: true
   datasource:
     #1.JDBC
     type: com.alibaba.druid.pool.DruidDataSource
     driver-class-name: com.mysql.jdbc.Driver
     url: jdbc:mysql://localhost:3306/xufanqi?useUnicode=true&characterEncoding=UTF-8&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
     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

   servlet:
     multipart:
       max-file-size: 20MB
       max-request-size: 60MB

配置Springboot03Application

 package com.javaqi.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);
     }

 }

文件映射配置类MyWebAppConfigurer.java

 package com.javaqi.springboot03.config;

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

 /**
  * @author XuFanQi
  * @site
  * @company
  * @create 2019-11-30 17:02
  */
 @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.javaqi.springboot03.utils;

 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<html>的标签
         txtcontent = txtcontent.replaceAll("<a>\\s*|\t|\r|\n</a>", "");//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) {
     }
 }

PageUtil

 package com.javaqi.springboot03.utils;

 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("<form id='pageBeanForm' action='"+pageBean.getUrl()+"' method='post'>");
         sb.append("<input type='hidden' name='page'>");
         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("<input type='hidden' name='"+entry.getKey()+"' value='"+val+"'>");
                     }
                 }
             }
         }
         sb.append("</form>");

         if(pageBean.getTotal()==0){
             return "未查询到数据";
         }else{
             sb.append("<li><a href='javascript:gotoPage(1)'>首页</a></li>");
             if(pageBean.getPage()>1){
                 sb.append("<li><a href='javascript:gotoPage("+pageBean.getPreviousPage()+")'>上一页</a></li>");
             }else{
                 sb.append("<li class='disabled'><a href='javascript:gotoPage(1)'>上一页</a></li>");
             }
             for(int i=pageBean.getPage()-1;i<=pageBean.getPage()+1;i++){
                 if(i<1||i>pageBean.getMaxPage()){
                     continue;
                 }
                 if(i==pageBean.getPage()){
                     sb.append("<li class='active'><a href='#'>"+i+"</a></li>");
                 }else{
                     sb.append("<li><a href='javascript:gotoPage("+i+")'>"+i+"</a></li>");
                 }
             }
             if(pageBean.getPage()<pageBean.getMaxPage()){
                 sb.append("<li><a href='javascript:gotoPage("+pageBean.getNextPage()+")'>下一页</a></li>");
             }else{
                 sb.append("<li class='disabled'><a href='javascript:gotoPage("+pageBean.getMaxPage()+")'>下一页</a></li>");
             }
             sb.append("<li><a href='javascript:gotoPage("+pageBean.getMaxPage()+")'>尾页</a></li>");
         }

         /*
          * 给分页条添加与后台交互的js代码
          */
         sb.append("<script type='text/javascript'>");
         sb.append("        function gotoPage(page) {");
         sb.append("            document.getElementById('pageBeanForm').page.value = page;");
         sb.append("            document.getElementById('pageBeanForm').submit();");
         sb.append("        }");
         sb.append("        function skipPage() {");
         sb.append("            var page = document.getElementById('skipPage').value;");
         sb.append("            if(!page || isNaN(page) || parseInt(page)<1 || parseInt(page)>"+pageBean.getMaxPage()+"){");
         sb.append("                alert('请输入1~N的数字');");
         sb.append("                return;");
         sb.append("            }");
         sb.append("            gotoPage(page);");
         sb.append("        }");
         sb.append("</script>");
         return sb.toString();
     }
 }

PageBean

 package com.javaqi.springboot03.utils;

 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 + "]";
     }
 }

实体类（自动生成数据库表）

 package com.javaqi.springboot03.entity;

 import lombok.ToString;

 import javax.persistence.*;

 @Entity
 @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.javaqi.springboot03.repository;

 import com.javaqi.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<T>接口
  */
 public interface TeacherDao extends JpaRepository<Teacher, Integer>, JpaSpecificationExecutor<Teacher> {
 }

Service层 

TeacherService

 package com.javaqi.springboot03.service;

 import com.javaqi.springboot03.entity.Teacher;
 import com.javaqi.springboot03.utils.PageBean;
 import org.springframework.data.domain.Page;

 /**
  * @author XuFanQi
  * @site
  * @company
  * @create 2019-12-01 10:41
  */
 public interface TeacherService {
     public Teacher save(Teacher teacher);
     public void deleteById(Integer id);
     public Teacher findById(Integer id);
     public Page<Teacher> listPager(Teacher teacher, PageBean pageBean);
 }

TeacherServiceImpl 

 package com.javaqi.springboot03.service.impl;

 import com.javaqi.springboot03.entity.Teacher;
 import com.javaqi.springboot03.repository.TeacherDao;
 import com.javaqi.springboot03.service.TeacherService;
 import com.javaqi.springboot03.utils.PageBean;
 import com.javaqi.springboot03.utils.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;

 /**
  * @author XuFanQi
  * @site
  * @company
  * @create 2019-12-01 10:43
  */
 @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

TeacherController 

 package com.javaqi.springboot03.controller;

 import com.javaqi.springboot03.entity.Teacher;
 import com.javaqi.springboot03.service.TeacherService;
 import com.javaqi.springboot03.utils.PageBean;
 import com.javaqi.springboot03.utils.PageUtil;
 import com.javaqi.springboot03.utils.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("&gt:",">")*/);
         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";
     }
 }

templates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>

浏览器访问结果

新增，查询，分页