JPA+Thymeleaf增删改查

梦城忆2024-09-29 13:08

文章目录

快速上手

配置文件

pom包里面添加jpa和thymeleaf的相关包引用

xml 复制代码 
<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-thymeleaf</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-devtools</artifactId>
			<scope>runtime</scope>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>jakarta.servlet</groupId>
			<artifactId>jakarta.servlet-api</artifactId>
		</dependency>
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>8.0.33</version>
		</dependency>
		<dependency>
			<groupId>com.baomidou</groupId>
			<artifactId>mybatis-plus-spring-boot3-starter</artifactId>
			<version>3.5.7</version>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-configuration-processor</artifactId>
			<optional>true</optional>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-tomcat</artifactId>
			<scope>provided</scope>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

在application.yml中添加配置

yml 复制代码 
spring:
  application:
    name: crm
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/crm?useUnicode=true&characterEncoding=utf-8
    username: root
    password: 12345678
    #热部署配置
  devtools:
    restart:
      enabled: true
      additional-paths: scr/main/java
  jpa:
    #显示SQL
    show-sql: true
    properties:
      hibernate:
        #配置格式化SQL语句
        format_sql: true
    database: mysql
    generate-ddl: true
server:
  servlet:
    context-path: /crm
#mybatis-plus:
#  mapper-locations: classpath:/com/bdqn/mapper/*.xml
#  type-aliases-package: com.bdqn.entity

创建实体类

java 复制代码 
@Data
@NoArgsConstructor
@AllArgsConstructor
@Entity
@ToString
@Table(name = "sys_user")
public class User implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "usr_id")
    private Long usrId;
    @Column(name = "usr_name")
    private String usrName;
    @Column(name = "usr_password")
    private String usrPassword;
    @ManyToOne(targetEntity = Role.class)
    @JoinColumn(name = "usr_role_id")
    private Role role;
    @Column(name = "usr_flag")
    private Integer usrFlag;

}

继承 JpaRepository 类会自动实现很多内置的方法，包括增删改查。也可以根据方法名来自动生成相关 Sql。

java 复制代码 
public interface UserRepository extends JpaRepository<User,Long>, JpaSpecificationExecutor<User> {
    List<User> findByUsrNameAndUsrPassword(String usrName,String usrPassword);
}

业务层处理

Service 调用 Jpa 实现相关的增删改查，实际项目中 Service 层处理具体的业务代码。

java 复制代码 
public interface IUserService {
    User login(String usrName, String usrPassword);
    void saveUser(User user); //适用新增和修改
    void deleteUser(Long usrId);
    User getUser(Long usrId);
    //按条件进行分页查询（动态SQL）
    Page<User> findUsers(String usrName, Long roleId, Pageable pageable);
}

Controller 负责接收请求，处理完后将页面内容返回给前端。

java 复制代码 
@Controller
public class UserController {

    @Resource
    private IUserService userService;

    @Resource
    private IRoleService roleService;

    @RequestMapping(value = "dologin")
    public String dologin(String usrName, String usrPassword, HttpServletRequest request){
        User user = userService.login(usrName,usrPassword);
        if(user != null){
            request.getSession().setAttribute("loginUser",user);
            return "main";
        }else {
            request.setAttribute("message","登录失败，用户名或密码错误！");
            return "login";
        }
    }

    @RequestMapping(value = "logout")
    public String logout(HttpSession session){
        session.removeAttribute("loginUser");
        return "login";
    }

    @RequestMapping(value = "/user/add")
    public String add(Model model){
        List<Role> roles = roleService.findAllRoles();
        model.addAttribute("roles",roles);
        return "user/add";
    }

    @RequestMapping(value = "/user/save")
    public String save(User user){
        userService.saveUser(user);
        return "redirect:/user/list";
    }

    @RequestMapping(value = "/user/edit")
    public String edit(Long usrId, Model model){
        User user = userService.getUser(usrId);
        List<Role> roles = roleService.findAllRoles();
        model.addAttribute("user",user);
        model.addAttribute("roles",roles);
        return "user/edit";
    }

    @RequestMapping(value = "/user/del")
    @ResponseBody
    public Map del(Long usrId){
        userService.getUser(usrId);
        Map map = new HashMap();
        map.put("delResult","true");
        return map;
    }

    @GetMapping(value = "/user/list")
    public String list(Model model, String usrName,
                       @RequestParam(required = false,defaultValue = "0") Long roleId,
                       @RequestParam(required = false,defaultValue = "1") int pageIndex){
        Sort sort = Sort.by(Sort.Direction.ASC,"usrId");
        Pageable pageable = PageRequest.of(pageIndex-1,5,sort);
        Page<User> userPager = userService.findUsers(usrName,roleId,pageable);
        model.addAttribute("userPager",userPager);
        model.addAttribute("usrName",usrName);
        model.addAttribute("roleId",roleId);
        return "user/list";
    }

    @RequestMapping(value = "/role/json")
    @ResponseBody
    public List<Role> findAllRoles(){
        return roleService.findAllRoles();
    }
}

创建Thymeleaf模板

在src/main/resources/templates目录下创建Thymeleaf模板文件

html 复制代码 
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org" layout:decorate="~{main}"
      xmlns:layout="http://www.ultraq.net.nz/web/thymeleaf/layout"
>
<head>
    <title>用户管理</title>
    <link th:href="@{/localcss/crmlist.css}" href="../../static/localcss/crmlist.css" rel="stylesheet">
</head>
<body>
<div layout:fragment="content">
    <div class="">
        <div class="clearfix"></div>
        <div class="row">
            <div class="col-md-12">
                <div class="x_panel">
                    <div class="x_title">
                        <h2>
                            用户管理 <i class="fa fa-user"></i>
                            <small>
                                - 您可以通过搜索或者其他的筛选项对用户的信息进行编辑、删除等管理操作。^_^
                            </small>
                        </h2>
                        <div class="clearfix"></div>
                    </div>
                    <div class="x_content">
                        <form method="post" action="/user/list" th:action="@{/user/list}">
                            <input type="hidden" name="pageIndex" value="1" />
                            <ul>
                                <li>
                                    <div class="form-group">
                                        <label class="control-label col-md-3 col-sm-3 col-xs-12">用户名称</label>
                                        <div class="col-md-6 col-sm-6 col-xs-12">
                                            <input name="usrName" type="text" th:value="${usrName}"
                                                   class="form-control col-md-6 col-xs-12" value="">
                                        </div>
                                    </div>
                                </li>
                                <li>
                                    <div class="form-group">
                                        <label class="control-label col-md-3 col-sm-3 col-xs-12">角色</label>
                                        <div class="col-md-6 col-sm-6 col-xs-12">
                                            <select name="roleId" id="roleId" class="form-control">
                                                <option value="0">--请选择--</option>
                                                <option th:selected="${role.roleId eq roleId}" th:each="role : ${roles}"
                                                        th:value="${role.roleId}" th:text="${role.roleName}" value="">
                                                    角色1
                                                </option>
                                            </select>
                                        </div>
                                    </div>
                                </li>
                                <li>
                                    <button type="submit" class="btn btn-primary"> 查&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;询
                                    </button>
                                </li>
                            </ul>
                        </form>
                    </div>
                </div>
            </div>
            <div class="col-md-12 col-sm-12 col-xs-12">
                <div class="x_panel">
                    <div class="x_content">
                        <p class="text-muted font-13 m-b-30"></p>
                        <div id="datatable-responsive_wrapper"
                             class="dataTables_wrapper form-inline dt-bootstrap no-footer">
                            <div class="row">
                                <div class="col-sm-12">
                                    <!-- <a href="/user/add" th:href="@{/user/add}" shiro:hasPermission="用户添加" class="btn btn-success btn-sm">新增用户信息</a> -->
                                    <a href="/user/add" th:href="@{/user/add}" class="btn btn-success btn-sm">新增用户信息</a>
                                    <table id="datatable-responsive"
                                           class="table table-striped table-bordered dt-responsive nowrap dataTable no-footer dtr-inline collapsed"
                                           cellspacing="0" width="100%" role="grid"
                                           aria-describedby="datatable-responsive_info" style="width: 100%;">
                                        <thead>
                                        <tr role="row">
                                            <th class="sorting_asc" tabindex="0"
                                                aria-controls="datatable-responsive" rowspan="1" colspan="1"
                                                aria-label="First name: activate to sort column descending"
                                                aria-sort="ascending">编号
                                            </th>
                                            <th class="sorting" tabindex="0"
                                                aria-controls="datatable-responsive" rowspan="1" colspan="1"
                                                aria-label="Last name: activate to sort column ascending">
                                                用户名
                                            </th>
                                            <th class="sorting" tabindex="0"
                                                aria-controls="datatable-responsive" rowspan="1" colspan="1"
                                                aria-label="Last name: activate to sort column ascending">
                                                角色
                                            </th>
                                            <th class="sorting" tabindex="0"
                                                aria-controls="datatable-responsive" rowspan="1" colspan="1"
                                                aria-label="Last name: activate to sort column ascending">
                                                操作
                                            </th>
                                        </tr>
                                        </thead>
                                        <tbody>
                                        <tr role="row" class="odd" th:each="user : ${userPager.records}">
                                            <td tabindex="0" class="sorting_1" th:text="${user.usrId}">usrId</td>
                                            <td th:text="${user.usrName}">usrName</td>
                                            <td th:text="${user.role.roleName}">roleName</td>
                                            <td>
                                                <div class="btn-group">
                                                    <button type="button" class="btn btn-danger">点击操作</button>
                                                    <button type="button" class="btn btn-danger dropdown-toggle"
                                                            data-toggle="dropdown" aria-expanded="false">
                                                        <span class="caret"></span>
                                                        <span class="sr-only">Toggle Dropdown</span>
                                                    </button>
                                                    <ul class="dropdown-menu" role="menu">
                                                        <li><a class="editInfo"
                                                               href="/user/edit?usrId=1"
                                                               th:href="@{/user/edit(usrId=${user.usrId})}"
                                                               data-toggle="tooltip"
                                                               data-placement="top" title=""
                                                               data-original-title="编辑">编辑</a>
                                                        </li>
                                                        <li><a class="delInfo" id="del" href="#"
                                                               th:onclick="|doDel(this,${user.usrId})|"
                                                               data-toggle="tooltip" data-placement="top" title=""
                                                               data-original-title="删除">删除</a></li>
                                                    </ul>
                                                </div>
                                            </td>
                                        </tr>
                                        </tbody>
                                    </table>
                                </div>
                            </div>
                            <div class="row">
                                <div class="col-sm-5">
                                    <div class="dataTables_info" id="datatable-responsive_info"
                                         role="status" aria-live="polite">共<span th:text="${userPager.total }">1</span>条记录
                                        <span th:text="${userPager.current }">1</span>/<span
                                                th:text="${userPager.pages }">1</span>页
                                    </div>
                                </div>
                                <div class="col-sm-7">
                                    <div class="dataTables_paginate paging_simple_numbers"
                                         id="datatable-responsive_paginate">
                                        <ul class="pagination">
                                            <li class="paginate_button previous" th:if="${userPager.current gt 0}"><a
                                                    href="javascript:page_nav(document.forms[0],1);"
                                                    aria-controls="datatable-responsive" data-dt-idx="0"
                                                    tabindex="0">首页</a>
                                            </li>
                                            <li class="paginate_button" th:if="${userPager.current gt 1}"><a href="#"
                                                                                                             th:onclick="'javascript:page_nav(document.forms[0],'+${userPager.current - 1 }+');'"
                                                                                                             aria-controls="datatable-responsive"
                                                                                                             data-dt-idx="1"
                                                                                                             tabindex="0">上一页</a>
                                            </li>
                                            <li class="paginate_button "
                                                th:if="${(userPager.current) lt userPager.pages}"><a
                                                    href="#"
                                                    th:onclick="'javascript:page_nav(document.forms[0],'+${userPager.current + 1 }+');'"
                                                    aria-controls="datatable-responsive" data-dt-idx="1"
                                                    tabindex="0">下一页</a>
                                            </li>
                                            <li class="paginate_button next"
                                                th:if="${(userPager.current) lt userPager.total}"><a
                                                    href="#"
                                                    th:onclick="'javascript:page_nav(document.forms[0],'+${userPager.pages }+');'"
                                                    aria-controls="datatable-responsive" data-dt-idx="7"
                                                    tabindex="0">最后一页</a>
                                            </li>
                                        </ul>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>
</body>
<script layout:fragment="js" th:inline="javascript">
    // 获取项目路径
    /*<![CDATA[*/
    var ctxPath = /*[[@{/}]]*/ '';

    /*]]>*/
    function doDel(obj, usrId) {
        if (confirm("你确定需要删除该用户信息吗？")) {
            $.ajax({
                type: "POST",
                url: ctxPath + "user/del/" + usrId,
                /*data: {
                 "usrId": usrId
                 },*/
                dataType: "json",
                success: function (data) {
                    // alert(JSON.stringify(data)); // {"result":"true"}
                    if (data.result === "true") { // 删除成功：移除删除行
                        alert("删除成功！");
                        $(obj).parents("tr").remove();
                        // window.location.href = project_name() + "/user/list";
                    }
                },
                error: function (data) {
                    alert("对不起，删除失败！");
                }
            });
        }
    }

    /*$(document).ready(function(){
     $.ajax({
     type:"GET",
     url:"${pageContext.request.contextPath}/role/json",
     dataType:"json",
     success:function(data){
     $.each(data, function(i, tmp) {
     $("#roleId").append(
     "<option value='"+tmp.roleId+"'>" + tmp.roleName + "</option>");
     });
     },
     error:function(data){
     alert("对不起，获取数据失败！");
     }
     });
     });*/
</script>
</html>
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