Springboot+bootstrap介面版之增刪改查及圖片上傳
Springboot+bootstrap介面版之增刪改查及圖片上傳
匯入pom
<mysql.version>5.1.44</mysql.version>
<version>${mysql.version}</version>
<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>
2. 配置yml
0.0jpa配置和埠
server:
port: 80
servlet:
context-path: /
spring:
jpa:
hibernate:
ddl-auto: update
show-sql: true
1.0duird資料連線池
datasource:
#1.JDBC
type: com.alibaba.druid.pool.DruidDataSource
driver-class-name: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost:3306/yind?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
1.1解決thymeleaf模板快取
thymeleaf:
cache: false
1.2解決圖片上傳大小限制問題，也可採取配置類
servlet:
multipart:
max-file-size: 20MB
max-request-size: 60MB
上傳檔案對映配置類MyWebAppConfigurer.java
建一個config包
/**
* 資源對映路徑
*/
@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);
}
}
1.解析
registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/");
這個配置是，如果你不配，他會把你的圖片的請求，當作請求來處理。
registry.addResourceHandler("/uploadImages/**").addResourceLocations("file:E:/temp/");
這個配置是一個虛擬對映，將E:/temp/對映成一個網路請求
工具類
StringUtils .java
package com.javabz.springbootjpa.utils;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;
/**
* @author因果
* @site www.xiaomage.com
* @company xxx公司
* @create 2020-12-03 19:28
*/
public class StringUtils {
// 私有的構造方法，保護此類不能在外部例項化
private StringUtils() {
}
/**
* 如果字串等於null或去空格後等於""，則返回true，否則返回false
*
* @param s
* @return
*/
public static boolean isBlank(String s) {
boolean b = false;
if (null == s || s.trim().equals("")) {
b = true;
}
return b;
}
/**
* 如果字串不等於null或去空格後不等於""，則返回true，否則返回false
*
* @param s
* @return
*/
public static boolean isNotBlank(String s) {
return !isBlank(s);
}
/**
* set集合轉string
* @param hasPerms
* @return
*/
public static String SetToString(Set hasPerms){
return Arrays.toString(hasPerms.toArray()).replaceAll(" ", "").replace("[", "").replace("]", "");
}
/**
* 轉換成模糊查詢所需引數
* @param before
* @return
*/
public static String toLikeStr(String before){
return isBlank(before) ? null : "%"+before+"%";
}
/**
* 將圖片的伺服器訪問地址轉換為真實存放地址
* @param imgpath 圖片訪問地址（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);
}
/**
* 過濾掉集合裡的空格
* @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;
}
/**
* 從html中提取純文字
* @param strHtml
* @return
*/
public static String html2Text(String strHtml) {
String txtcontent = strHtml.replaceAll("</?[^>]+>", ""); //剔出<html>的標籤
txtcontent = txtcontent.replaceAll("<a>\\s*|\t|\r|\n</a>", "");//去除字串中的空格,回車,換行符,製表符
return txtcontent;
}
public static void main(String[] args) {
}
}
PageUtil.java
package com.javabz.springbootjpa.utils;
import java.util.Map;
import java.util.Set;
public class PageUtil {
public static String createPageCode(PageBean pageBean) {
StringBuffer sb = new StringBuffer();
/*
* 拼接向後臺提交資料的form表單
* 注意：拼接的form表單中的page引數是變化的，所以不需要保留上一次請求的值
*/
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 "未查詢到資料";
}else{
sb.append("<li><a href='javascript:gotoPage(1)'>首頁</a></li>");
if(pageBean.getPage()>1){
sb.append("<li><a href='javascript:gotoPage("+pageBean.getPreviousPage()+")'>上一頁</a></li>");
}else{
sb.append("<li class='disabled'><a href='javascript:gotoPage(1)'>上一頁</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()+")'>下一頁</a></li>");
}else{
sb.append("<li class='disabled'><a href='javascript:gotoPage("+pageBean.getMaxPage()+")'>下一頁</a></li>");
}
sb.append("<li><a href='javascript:gotoPage("+pageBean.getMaxPage()+")'>尾頁</a></li>");
}
/*
* 給分頁條新增與後臺互動的js程式碼
*/
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('請輸入1~N的數字');");
sb.append(" return;");
sb.append(" }");
sb.append(" gotoPage(page);");
sb.append(" }");
sb.append("</script>");
return sb.toString();
}
}
PageBean.java
package com.javabz.springbootjpa.utils;
import javax.servlet.http.HttpServletRequest;
import java.util.Map;
/**
* 分頁工具類
*/
public class PageBean {
private int page = 1;// 頁碼
private int rows = 3;// 頁大小
private int total = 0;// 總記錄數
private boolean pagination = true;// 是否分頁
// 儲存上次查詢的引數
private Map<String, String[]> paramMap;
// 儲存上次查詢的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);
}
}
/**
* 最大頁
* @return
*/
public int getMaxPage() {
int max = this.total/this.rows;
if(this.total % this.rows !=0) {
max ++ ;
}
return max;
}
/**
* 下一頁
* @return
*/
public int getNextPage() {
int nextPage = this.page + 1;
if(nextPage > this.getMaxPage()) {
nextPage = this.getMaxPage();
}
return nextPage;
}
/**
* 上一頁
* @return
*/
public int getPreviousPage() {
int previousPage = this.page -1;
if(previousPage < 1) {
previousPage = 1;
}
return previousPage;
}
/**
* 獲得起始記錄的下標
*
* @return
*/
public int getStartIndex() {
return (this.page - 1) * this.rows;
}
@Override
public String toString() {
return "PageBean [page=" + page + ", rows=" + rows + ", total=" + total + ", pagination=" + pagination + "]";
}
}
實體類
Teacher.java
package com.javabz.springbootjpa.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;
}
}
編寫dao類
package com.javabz.springbootjpa.resources;
import com.javabz.springbootjpa.entity.Teacher;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.JpaSpecificationExecutor;
/**
*
* 只要繼承JpaRepository，通常所用的增刪查改方法都有
* 第一個引數：操作的實體類
* 第二個引數：實體類對應資料表的主鍵
*
* 要使用高階查詢必須繼承
* org.springframework.data.jpa.repository.JpaSpecificationExecutor<T>介面
*/
public interface TeacherDao extends JpaRepository<Teacher, Integer>, JpaSpecificationExecutor<Teacher> {
}
service層
TeacherService
package com.javabz.springbootjpa.service;
import com.javabz.springbootjpa.entity.Teacher;
import com.javabz.springbootjpa.utils.PageBean;
import org.springframework.data.domain.Page;
/**
* @author因果
* @site www.xiaomage.com
* @company xxx公司
* @create 2020-12-03 20:25
*/
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.java
注意： 分頁的返回值是Page的願因是page能給於pageBean賦setTotal值
package com.javabz.springbootjpa.service.impl;
import com.javabz.springbootjpa.entity.Teacher;
import com.javabz.springbootjpa.resources.TeacherDao;
import com.javabz.springbootjpa.service.TeacherService;
import com.javabz.springbootjpa.utils.PageBean;
import com.javabz.springbootjpa.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因果
* @site www.xiaomage.com
* @company xxx公司
* @create 2020-12-03 20:26
*/
@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分頁是從0頁碼開始
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);
}
}
controll
package com.javabz.springbootjpa.controller;
import com.javabz.springbootjpa.entity.Teacher;
import com.javabz.springbootjpa.service.TeacherService;
import com.javabz.springbootjpa.utils.PageBean;
import com.javabz.springbootjpa.utils.PageUtil;
import com.javabz.springbootjpa.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;
/**
* @author 小李飛刀
* @site www.javaxl.com
* @company
* @create 2019-02-20 22:15
*/
@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";
}
}
JSP程式碼
list.html
<!DOCTYPE html>
<html lang="en">
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>書籍列表</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">
書籍名稱： <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>頭像</td>
<td>姓名</td>
<td>性別</td>
<td>簡介</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/'+${teacher.tid}}">刪除</a>
<a th:href="@{'/teacher/toEdit?tid='+${teacher.tid}}">修改</a>
</td>
</tr>
</tbody>
</table>
<nav>
<ul class="pagination pagination-sm" th:utext="${pageCode}">
</ul>
<!--<ul class="pagination pagination-sm">-->
<!--<form id='pageBeanForm' action='http://localhost:8080/springboot/teacher/listPager' method='post'><input type='hidden' name='page'></form>-->
<!--<li><a href='javascript:gotoPage(1)'>首頁</a></li>-->
<!--<li class='disabled'><a href='javascript:gotoPage(1)'>上一頁</a></li>-->
<!--<li class='active'><a href='#'>1</a></li>-->
<!--<li><a href='javascript:gotoPage(2)'>2</a></li>-->
<!--<li><a href='javascript:gotoPage(2)'>下一頁</a></li>-->
<!--<li><a href='javascript:gotoPage(4)'>尾頁</a></li>-->
<!--<script type='text/javascript'> function gotoPage(page) { document.getElementById('pageBeanForm').page.value = page; document.getElementById('pageBeanForm').submit(); } function skipPage() { var page = document.getElementById('skipPage').value; if(!page || isNaN(page) || parseInt(page)<1 || parseInt(page)>4){ alert('請輸入1~N的數字'); return; } gotoPage(page); }</script>-->
<!--</ul>-->
</nav>
</body>
</html>
edit.html
<!DOCTYPE html>
<html lang="en">
<html xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>使用者編輯介面</title>
<script type="text/javascript">
function preShow() {
}
</script>
</head>
<body>
<form th:action="@{${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>
教員名稱： <input type="text" name="tname" th:value="${teacher.tname}" /></br>
教員描述： <input type="text" name="description" th:value="${teacher.description}" /></br>
單選回顯
<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>
連結
連結: bootstrap3.
提取碼：wivs
測試
http://localhost/teacher/listPager
效果圖
總結：
1.不知如何終結
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