生成拼贴的网站,小程序源码之家,wordpress防止发表重复标题的文章,使用 加速乐 网站变慢在本教程中#xff0c;我将演示如何通过分页显示Thymeleaf中的企业客户列表。 1 –项目结构 我们有一个正常的Maven项目结构。 2 –项目依赖性 除了正常的Spring依赖关系之外#xff0c;我们还添加Thymeleaf和hsqldb#xff0c;因为我们使用的是嵌入式数据库。 ?x… 在本教程中我将演示如何通过分页显示Thymeleaf中的企业客户列表。 1 –项目结构 我们有一个正常的Maven项目结构。 2 –项目依赖性 除了正常的Spring依赖关系之外我们还添加Thymeleaf和hsqldb因为我们使用的是嵌入式数据库。 ?xml version1.0 encodingUTF-8?
project xmlnshttp://maven.apache.org/POM/4.0.0 xmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsdmodelVersion4.0.0/modelVersiongroupIdcom.michaelcgood/groupIdartifactIdmichaelcgood-pagingandsorting/artifactIdversion0.0.1/versionpackagingjar/packagingnamePagingAndSortingRepositoryExample/namedescriptionMichael C Good - PagingAndSortingRepository/descriptionparentgroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-parent/artifactIdversion1.5.6.RELEASE/versionrelativePath / !-- lookup parent from repository --/parentpropertiesproject.build.sourceEncodingUTF-8/project.build.sourceEncodingproject.reporting.outputEncodingUTF-8/project.reporting.outputEncodingjava.version1.8/java.version/propertiesdependenciesdependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-thymeleaf/artifactId/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-test/artifactIdscopetest/scope/dependencydependencygroupIdorg.hsqldb/groupIdartifactIdhsqldb/artifactIdscoperuntime/scope/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-data-jpa/artifactId/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactId/dependency/dependenciesbuildpluginsplugingroupIdorg.springframework.boot/groupIdartifactIdspring-boot-maven-plugin/artifactId/plugin/plugins/build/project3 –型号 我们为客户定义以下字段 唯一标识符 客户名称 客户地址 当前发票上的欠款 getter和setter在Spring Tool Suite中快速生成。 要将此模型注册到SpringBootApplication需要Entity批注。 ClientModel.java package com.michaelcgood.model;import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;Entity
public class ClientModel {IdGeneratedValue(strategy GenerationType.AUTO)private Long id;public Long getId() {return id;}public void setId(Long id) {this.id id;}public String getName() {return name;}public void setName(String name) {this.name name;}public String getAddress() {return address;}public void setAddress(String address) {this.address address;}public Integer getCurrentInvoice() {return currentInvoice;}public void setCurrentInvoice(Integer currentInvoice) {this.currentInvoice currentInvoice;}private String name;private String address;private Integer currentInvoice;} 与ClientModel不同PagerModel只是一个POJO普通的旧Java对象。 没有导入因此没有注释。 此PagerModel仅用于帮助我们网页上的分页。 阅读Thymeleaf模板并查看演示图片后请重新访问此模型。 当您在上下文中考虑它时PagerModel更有意义。 PagerModel.java package com.michaelcgood.model;public class PagerModel {private int buttonsToShow 5;private int startPage;private int endPage;public PagerModel(int totalPages, int currentPage, int buttonsToShow) {setButtonsToShow(buttonsToShow);int halfPagesToShow getButtonsToShow() / 2;if (totalPages getButtonsToShow()) {setStartPage(1);setEndPage(totalPages);} else if (currentPage - halfPagesToShow 0) {setStartPage(1);setEndPage(getButtonsToShow());} else if (currentPage halfPagesToShow totalPages) {setStartPage(currentPage - halfPagesToShow);setEndPage(totalPages);} else if (currentPage halfPagesToShow totalPages) {setStartPage(totalPages - getButtonsToShow() 1);setEndPage(totalPages);} else {setStartPage(currentPage - halfPagesToShow);setEndPage(currentPage halfPagesToShow);}}public int getButtonsToShow() {return buttonsToShow;}public void setButtonsToShow(int buttonsToShow) {if (buttonsToShow % 2 ! 0) {this.buttonsToShow buttonsToShow;} else {throw new IllegalArgumentException(Must be an odd value!);}}public int getStartPage() {return startPage;}public void setStartPage(int startPage) {this.startPage startPage;}public int getEndPage() {return endPage;}public void setEndPage(int endPage) {this.endPage endPage;}Overridepublic String toString() {return Pager [startPage startPage , endPage endPage ];}}4 –储存库 PagingAndSortingRepository是CrudRepository的扩展。 唯一的区别是它允许您对实体进行分页。 注意我们用Repository注释了接口以使其对SpringBootApplication可见。 ClientRepository.java package com.michaelcgood.dao;import org.springframework.data.repository.PagingAndSortingRepository;
import org.springframework.stereotype.Repository;import com.michaelcgood.model.ClientModel;Repository
public interface ClientRepository extends PagingAndSortingRepositoryClientModel,Long {}5 –控制器 我们在课程开始时定义一些变量。 我们只想一次显示3个页面按钮。 初始页面是结果的第一页页面上的初始项目数是5并且用户能够每页获得5或10个结果。 我们使用addtorepository方法将一些示例值添加到我们的存储库中该方法将在此类中进一步定义。 使用addtorepository method我们将几个“客户端”添加到我们的存储库中其中许多都是帽子公司因为我没有想法。 这里使用ModelAndView而不是Model。 而是使用ModelAndView因为它既是ModelMap也是视图对象的容器。 它允许控制器将两个值作为单个值返回。 这是我们正在做的事情所希望的。 ClientController.java package com.michaelcgood.controller;import java.util.Optional;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import com.michaelcgood.model.PagerModel;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;import com.michaelcgood.dao.ClientRepository;
import com.michaelcgood.model.ClientModel;Controller
public class ClientController {private static final int BUTTONS_TO_SHOW 3;private static final int INITIAL_PAGE 0;private static final int INITIAL_PAGE_SIZE 5;private static final int[] PAGE_SIZES { 5, 10};AutowiredClientRepository clientrepository;GetMapping(/)public ModelAndView homepage(RequestParam(pageSize) OptionalInteger pageSize,RequestParam(page) OptionalInteger page){if(clientrepository.count()!0){;//pass}else{addtorepository();}ModelAndView modelAndView new ModelAndView(index);//// Evaluate page size. If requested parameter is null, return initial// page sizeint evalPageSize pageSize.orElse(INITIAL_PAGE_SIZE);// Evaluate page. If requested parameter is null or less than 0 (to// prevent exception), return initial size. Otherwise, return value of// param. decreased by 1.int evalPage (page.orElse(0) 1) ? INITIAL_PAGE : page.get() - 1;// print repoSystem.out.println(here is client repo clientrepository.findAll());PageClientModel clientlist clientrepository.findAll(new PageRequest(evalPage, evalPageSize));System.out.println(client list get total pages clientlist.getTotalPages() client list get number clientlist.getNumber());PagerModel pager new PagerModel(clientlist.getTotalPages(),clientlist.getNumber(),BUTTONS_TO_SHOW);// add clientmodelmodelAndView.addObject(clientlist,clientlist);// evaluate page sizemodelAndView.addObject(selectedPageSize, evalPageSize);// add page sizesmodelAndView.addObject(pageSizes, PAGE_SIZES);// add pagermodelAndView.addObject(pager, pager);return modelAndView;}public void addtorepository(){//below we are adding clients to our repository for the sake of this exampleClientModel widget new ClientModel();widget.setAddress(123 Fake Street);widget.setCurrentInvoice(10000);widget.setName(Widget Inc);clientrepository.save(widget);//next clientClientModel foo new ClientModel();foo.setAddress(456 Attorney Drive);foo.setCurrentInvoice(20000);foo.setName(Foo LLP);clientrepository.save(foo);//next clientClientModel bar new ClientModel();bar.setAddress(111 Bar Street);bar.setCurrentInvoice(30000);bar.setName(Bar and Food);clientrepository.save(bar);//next clientClientModel dog new ClientModel();dog.setAddress(222 Dog Drive);dog.setCurrentInvoice(40000);dog.setName(Dog Food and Accessories);clientrepository.save(dog);//next clientClientModel cat new ClientModel();cat.setAddress(333 Cat Court);cat.setCurrentInvoice(50000);cat.setName(Cat Food);clientrepository.save(cat);//next clientClientModel hat new ClientModel();hat.setAddress(444 Hat Drive);hat.setCurrentInvoice(60000);hat.setName(The Hat Shop);clientrepository.save(hat);//next clientClientModel hatB new ClientModel();hatB.setAddress(445 Hat Drive);hatB.setCurrentInvoice(60000);hatB.setName(The Hat Shop B);clientrepository.save(hatB);//next clientClientModel hatC new ClientModel();hatC.setAddress(446 Hat Drive);hatC.setCurrentInvoice(60000);hatC.setName(The Hat Shop C);clientrepository.save(hatC);//next clientClientModel hatD new ClientModel();hatD.setAddress(446 Hat Drive);hatD.setCurrentInvoice(60000);hatD.setName(The Hat Shop D);clientrepository.save(hatD);//next clientClientModel hatE new ClientModel();hatE.setAddress(447 Hat Drive);hatE.setCurrentInvoice(60000);hatE.setName(The Hat Shop E);clientrepository.save(hatE);//next clientClientModel hatF new ClientModel();hatF.setAddress(448 Hat Drive);hatF.setCurrentInvoice(60000);hatF.setName(The Hat Shop F);clientrepository.save(hatF);}}6 – Thymeleaf模板 在Thymeleaf模板中需要注意的两个最重要的事情是 胸腺标准方言 Java脚本 就像在CrudRepository中一样我们使用theach ” clientlist$ {clientlist}”遍历PagingAndSortingRepository。 除了不是存储库中的每个项目都是Iterable之外该项目都是页面。 使用select class “ form-control pagination” id “ pageSizeSelect”我们允许用户选择5或10的页面大小。我们在Controller中定义了这些值。 接下来是允许用户浏览各个页面的代码。 这是我们的PagerModel进入使用的地方。 changePageAndSize函数是JavaScript函数它将在用户更改页面大小时更新页面大小。 html xmlnshttp://www.w3.org/1999/xhtmlxmlns:thhttp://www.thymeleaf.orghead
!-- CSS INCLUDE --
link relstylesheethrefhttps://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.cssintegritysha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4VaPmSTsz/K68vbdEjh4ucrossoriginanonymous/link!-- EOF CSS INCLUDE --
style
.pagination-centered {text-align: center;
}.disabled {pointer-events: none;opacity: 0.5;
}.pointer-disabled {pointer-events: none;
}
/style/head
body!-- START PAGE CONTAINER --div classcontainer-fluid!-- START PAGE SIDEBAR --!-- commented out div th:replacefragments/header :: header /div --!-- END PAGE SIDEBAR --!-- PAGE TITLE --div classpage-titleh2span classfa fa-arrow-circle-o-left/span Client Viewer/h2/div!-- END PAGE TITLE --div classrowtable classtable datatabletheadtrthName/ththAddress/ththLoad/th/tr/theadtbodytr th:eachclientlist : ${clientlist}td th:text${clientlist.name}Text .../tdtd th:text${clientlist.address}Text .../tdtdbutton typebuttonclassbtn btn-primary btn-condensedi classglyphicon glyphicon-folder-open/i/button/td/tr/tbody/tablediv classrowdiv classform-group col-md-1select classform-control pagination idpageSizeSelectoption th:eachpageSize : ${pageSizes} th:text${pageSize}th:value${pageSize}th:selected${pageSize} ${selectedPageSize}/option/select/divdiv th:if${clientlist.totalPages ! 1}classform-group col-md-11 pagination-centeredul classpaginationli th:class${clientlist.number 0} ? disabledaclasspageLinkth:href{/(pageSize${selectedPageSize}, page1)}«/a/lili th:class${clientlist.number 0} ? disabledaclasspageLinkth:href{/(pageSize${selectedPageSize}, page${clientlist.number})}←/a/lilith:class${clientlist.number (page - 1)} ? active pointer-disabledth:eachpage : ${#numbers.sequence(pager.startPage, pager.endPage)}a classpageLinkth:href{/(pageSize${selectedPageSize}, page${page})}th:text${page}/a/lilith:class${clientlist.number 1 clientlist.totalPages} ? disableda classpageLinkth:href{/(pageSize${selectedPageSize}, page${clientlist.number 2})}→/a/lilith:class${clientlist.number 1 clientlist.totalPages} ? disableda classpageLinkth:href{/(pageSize${selectedPageSize}, page${clientlist.totalPages})}»/a/li/ul/div/div/div!-- END PAGE CONTENT --!-- END PAGE CONTAINER --/divscriptsrchttps://code.jquery.com/jquery-1.11.1.min.jsintegritysha256-VAvG3sHdS5LqTT5A/aeq/bZGa/Uj04xKxY8KM/w9EEcrossoriginanonymous/scriptscriptsrchttps://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.jsintegritysha384-Tc5IQib027qvyjSMfHjOMaLkfuWVxZxUPnCJA7l2mCWNIpG9mGCD8wGNIcPD7Txacrossoriginanonymous/scriptscript th:inlinejavascript/*![CDATA[*/$(document).ready(function() {changePageAndSize();
});function changePageAndSize() {$(#pageSizeSelect).change(function(evt) {window.location.replace(/?pageSize this.value page1);});
}/*]]*//script/body
/html7 –配置 可以根据您的喜好更改以下属性但这正是我所希望的环境。 application.properties #
# Thymeleaf configurations
#
spring.thymeleaf.check-template-locationtrue
spring.thymeleaf.prefixclasspath:/templates/
spring.thymeleaf.suffix.html
spring.thymeleaf.content-typetext/html
spring.thymeleaf.cachefalse
server.contextPath/8 –演示 这是主页。 这是第二页。 我可以将页面上的项目数量更改为10。 源代码在 Github上 翻译自: https://www.javacodegeeks.com/2017/10/pagingandsortingrepository-use-thymeleaf.html
