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Java --- springMVC实现RESTFul案例

news 来源：原创 2024/4/27 17:52:53

一、使用springMVC实现RESTFul小案例

1.1、项目目录图：

1.2、代码实现：

pom.xml文件：

    <packaging>war</packaging>
    <!--添加依赖-->
    <dependencies>
        <!--SpringMVC-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.3.1</version>
        </dependency>
        <!--日志-->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>
        <!--servletAPI-->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.thymeleaf</groupId>
            <artifactId>thymeleaf-spring5</artifactId>
            <version>3.0.12.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.10</version>
        </dependency>
    </dependencies>

web.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
    <filter>
        <filter-name>CharacterEncodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
        <init-param>
            <param-name>forceResponseEncoding</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>CharacterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <!--配置HiddenHttpMethodFilter-->
    <filter>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>HiddenHttpMethodFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>

    <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:SpringMVC.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>DispatcherServlet</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

SpringMVC.xml文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <context:component-scan base-package="com.cjc.mvc"></context:component-scan>
    <!--配置Thymeleaf视图解析器-->
    <bean id="viewResolver" class="org.thymeleaf.spring5.view.ThymeleafViewResolver">
        <property name="order" value="1"/>
        <property name="characterEncoding" value="UTF-8"/>
        <property name="templateEngine">
            <bean class="org.thymeleaf.spring5.SpringTemplateEngine">
                <property name="templateResolver">
                    <bean class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver">
                        <!--视图前缀-->
                        <property name="prefix" value="/WEB-INF/templates/"/>
                        <!--视图后缀-->
                        <property name="suffix" value=".html"/>
                        <property name="templateMode" value="HTML5"/>
                        <property name="characterEncoding" value="UTF-8"/>
                    </bean>
                </property>
            </bean>
        </property>
    </bean>
    <!--配置视图控制器-->
    <mvc:view-controller path="/" view-name="index"></mvc:view-controller>
    <mvc:view-controller path="/toAdd" view-name="employeeAdd"></mvc:view-controller>
    <!--开放对静态资源访问-->
    <mvc:default-servlet-handler/>
    <!--开启mvc的注解驱动-->
    <mvc:annotation-driven/>
</beans>

EmployeeController类

@Controller
public class EmployeeController {
     @Autowired
     private EmployeeDao employeeDao;
     @GetMapping("/getAllEmployee")
     public String getAllEmployee(Model model){
          Collection<Employee> employees = employeeDao.getAll();
          model.addAttribute("employees",employees);
          return "employeeList";
     }
     @DeleteMapping("/deleteEmployee/{id}")
     public String deleteEmployee(@PathVariable("id") Integer id){
          employeeDao.delete(id);
          return "redirect:/getAllEmployee";
     }
     @PostMapping("/addEmployee")
     public String addEmployee(Employee employee){
          employeeDao.save(employee);
          return "redirect:/getAllEmployee";
     }
     @GetMapping("/getEmployeeById/{id}")
     public String getEmployeeById(@PathVariable("id") Integer id,Model model){
          Employee employee = employeeDao.get(id);
          model.addAttribute("employee",employee);
          return "employeeUpdate";
     }
     @PutMapping("/updateEmployee")
     public String updateEmployee(Employee employee){
          employeeDao.save(employee);
          return "redirect:/getAllEmployee";
     }
}

EmployeeDao类：

@Repository
public class EmployeeDao {
    private static Map<Integer, Employee> employeeMap = null;
    static {
        employeeMap = new HashMap<Integer, Employee>();
        employeeMap.put(1001,new Employee(1001,"老王","123@qq.com",1));
        employeeMap.put(1002,new Employee(1002,"老李","456@qq.com",1));
        employeeMap.put(1003,new Employee(1003,"老赵","789@qq.com",0));
        employeeMap.put(1004,new Employee(1003,"老秦","987@qq.com",0));
        employeeMap.put(1005,new Employee(1003,"老头","654@qq.com",0));
        }
        private static Integer initId = 1006;
    public void save(Employee employee){
        if (employee.getId() == null){
            employee.setId(initId++);
        }
        employeeMap.put(employee.getId(),employee);
    }
    public Collection<Employee> getAll(){
        return employeeMap.values();
    }
    public Employee get(Integer id){
        return employeeMap.get(id);
    }
    public void delete(Integer id){
        employeeMap.remove(id);
    }
}

Employee类：

@AllArgsConstructor
@NoArgsConstructor
@Data
public class Employee {
    private Integer id;
    private String name;
    private String email;
    private Integer gender;
}

employeeAdd.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>添加</title>
</head>
<body>
<form th:action="@{/addEmployee}" method="post">
    name:<input type="text" name="name" ><br>
    email:<input type="text" name="email"><br>
    gender:<input type="radio" name="gender" value="1" >male
    <input type="radio" name="gender" value="2">female<br>
    <input type="submit" value="add">
</form>
</body>
</html>

employeeList.html:

<table id="dataTable" border="1" cellspacing="0" cellpadding="0" style="text-align: center">
    <tr>
        <th colspan="5">Employee Info</th>
    </tr>
    <tr>
        <th>id</th>
        <th>name</th>
        <th>email</th>
        <th>gender</th>
        <th>options(<a th:href="@{/toAdd}">add</a>)</th>
    </tr>
    <tr th:each="employee : ${employees}">
        <td th:text="${employee.id}"></td>
        <td th:text="${employee.name}"></td>
        <td th:text="${employee.email}"></td>
        <td th:text="${employee.gender}"></td>
        <td>
            <a @click="deleteEmployee" th:href="@{'/deleteEmployee/'+${employee.id}}">delete</a>
            <a th:href="@{'/getEmployeeById/'+${employee.id}}">update</a>
        </td>
    </tr>
</table>
<form id="deleteForm" method="post">
    <input type="hidden" name="_method" value="delete">
</form>
<script type="text/javascript" th:src="@{/static/js/vue.js}"></script>
<script type="text/javascript">
    var vue = new Vue({
        el:"#dataTable",
        methods:{
            deleteEmployee:function (event){
                //根据id获取表单元素
                var elementById = document.getElementById("deleteForm");
                //将触发点击事件的超链接的href属性赋值给表单action
                elementById.action = event.target.href;
                //提交表单
                elementById.submit();
                //取消超链接默认行为
                event.preventDefault();
           }
        }
    });
</script>
</body>
</html>

employeeUpdate.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>修改</title>
</head>
<body>
<form th:action="@{/updateEmployee}" method="post">
    <input type="hidden" name="_method" value="put">
    <input type="hidden" name="id" th:value="${employee.id}">
    name:<input type="text" name="name" th:value="${employee.name}"><br>
    email:<input type="text" name="email" th:value="${employee.email}"><br>
    gender:<input type="radio" name="gender" value="1" th:field="${employee.gender}">male
    <input type="radio" name="gender" value="2" th:field="${employee.gender}">female<br>
    <input type="submit" value="update">
</form>
</body>
</html>

index.html

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<body>
<h1>首页</h1>
<a th:href="@{/getAllEmployee}">查看员工信息</a>
</body>
</html>

vue.js这个文件可以自己下载拷贝过来

已上传到资源下载中：https://download.csdn.net/download/qq_46093575/86870794