可依照以下順序查看 source code
configurations
pom.xml
在POM檔加入Spring MVC的dependency
<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 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>camiol</groupId>
<artifactId>smvc</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>springMVC-Demo Maven Webapp</name>
<url>http://maven.apache.org</url>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>6.1.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-websocket</artifactId>
<version>6.1.4</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-messaging</artifactId>
<version>6.1.4</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-orm -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>6.1.4</version>
</dependency>
<!-- hibernate -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>6.4.4.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-c3p0</artifactId>
<version>6.4.4.Final</version>
</dependency>
<dependency>
<groupId>jakarta.servlet</groupId>
<artifactId>jakarta.servlet-api</artifactId>
<version>6.0.0</version>
<scope>provided</scope>
</dependency>
<!-- JSTL -->
<dependency>
<groupId>jakarta.servlet.jsp.jstl</groupId>
<artifactId>jakarta.servlet.jsp.jstl-api</artifactId>
<version>3.0.0</version>
</dependency>
<dependency>
<groupId>org.glassfish.web</groupId>
<artifactId>jakarta.servlet.jsp.jstl</artifactId>
<version>3.0.1</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.33</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.google.code.gson/gson -->
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.10.1</version>
</dependency>
</dependencies>
<build>
<finalName>smvc</finalName>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.12.1</version>
<configuration>
<source>17</source>
<target>17</target>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.4.0</version>
<configuration>
<warSourceDirectory>src/main/webapp</warSourceDirectory>
</configuration>
</plugin>
</plugins>
</build>
</project>web.xml
<?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_3_1.xsd"
version="3.1">
<display-name>SpringMVC-Demo Project</display-name>
<!-- Spring MVC DispatcherServlet -->
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:config/spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
</web-app>spring-mvc.xml
src/main/resources/config/spring-mvc.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:websocket="http://www.springframework.org/schema/websocket"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/websocket
http://www.springframework.org/schema/websocket/spring-websocket-4.1.xsd">
<mvc:annotation-driven />
<mvc:resources location="/js/" mapping="/js/**"/>
<context:annotation-config />
<!-- Database Configuration -->
<import resource="../database/datasource.xml" />
<import resource="../database/hibernate.xml" />
<context:component-scan
base-package="spring.demo" />
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>database.properties
src/main/resources/properties/database.properties
# DataSource
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/smvc?useUnicode=yes&characterEncoding=UTF-8
spring.datasource.username=root
spring.datasource.password=pwd
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
# C3P0
connectionPool.init_size=2
connectionPool.min_size=2
connectionPool.max_size=10
connectionPool.timeout=600
# SQL
jdbc.dataSource.dialect=org.hibernate.dialect.MySQLDialect
jdbc.dataSource.showSql=truedatasource.xml
src/main/resources/database/datasource.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<bean
class="org.springframework.context.support.PropertySourcesPlaceholderConfigurer">
<property name="location">
<value>classpath:properties/database.properties</value>
</property>
</bean>
<bean id="dataSource"
class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass"
value="${spring.datasource.driver-class-name}" />
<property name="jdbcUrl" value="${spring.datasource.url}" />
<property name="user" value="${spring.datasource.username}" />
<property name="password" value="${spring.datasource.password}" />
<property name="autoCommitOnClose" value="false"/> <!-- 連接關閉時默認將所有未提交的操作回復 Default:false -->
<property name="checkoutTimeout" value="${connectionPool.timeout}"/>
<property name="initialPoolSize" value="${connectionPool.init_size}"/>
<property name="minPoolSize" value="${connectionPool.min_size}"/>
<property name="maxPoolSize" value="${connectionPool.max_size}"/>
</bean>
</beans>hibernate.xml
src/main/resources/database/hibernate.xml
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- Hibernate session factory -->
<bean id="sessionFactory"
class="org.springframework.orm.hibernate5.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<property name="packagesToScan">
<list>
<value>spring.demo.entity</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${jdbc.dataSource.dialect}</prop>
<prop key="hibernate.show_sql">${jdbc.dataSource.showSql}</prop>
</props>
</property>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
</beans>mysql database
create table Student
(
id int(12) not null auto_increment,
Name national varchar(50),
Math_Score int,
primary key (id)
);
insert into Student (Name, Math_Score) values ('Aron', 33);
insert into Student (Name, Math_Score) values ('Benson', 22);java source code
HelloController
src/main/java/spring/demo/controller/HelloController.java
package spring.demo.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import spring.demo.entity.Student;
import spring.demo.service.StudentService;
@Controller
public class HelloController {
@Autowired
private StudentService service;
@RequestMapping("hello")
public ModelAndView hello() {
return new ModelAndView("hello");
}
@RequestMapping("list")
public ModelAndView list() {
List<Student> resultList = service.findStudent();
ModelAndView model = new ModelAndView();
model.setViewName("list");
model.addObject("resultList",resultList);
return model;
}
@RequestMapping(value = "view" ,method = RequestMethod.POST)
public ModelAndView view(@RequestParam("id") long id,@RequestParam("type") String type) {
System.out.println(id);
System.out.println(type);
Student s = service.findStudent(id);
ModelAndView model = new ModelAndView();
model.setViewName("view");
model.addObject("s", s);
model.addObject("type",type);
return model;
}
@RequestMapping(value = "update" ,method = RequestMethod.POST)
public ModelAndView update(@ModelAttribute("s") Student s,RedirectAttributes attr) {
service.updateStudent(s);
attr.addFlashAttribute("message","修改成功");
return new ModelAndView("redirect:hello");
}
}Student
src/main/java/spring/demo/entity/Student.java
package spring.demo.entity;
import jakarta.persistence.Column;
import jakarta.persistence.Entity;
import jakarta.persistence.GeneratedValue;
import jakarta.persistence.GenerationType;
import jakarta.persistence.Id;
import jakarta.persistence.Table;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
@Entity
@Table(name = "Student")
public class Student {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@Column(name="Name")
private String name;
@Column(name="Math_Score")
private int mathScore;
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 int getMathScore() {
return mathScore;
}
public void setMathScore(int mathScore) {
this.mathScore = mathScore;
}
public String toString() {
Gson gson = new GsonBuilder().setPrettyPrinting().create();
return gson.toJson(this);
}
}Student Service
src/main/java/spring/demo/service/StudentSerivce.java
package spring.demo.service;
import java.util.List;
import spring.demo.entity.Student;
public interface StudentService {
List<Student> findStudent();
Student findStudent(long id);
void updateStudent(Student s);
}src/main/java/spring/demo/service/impl/StudentSerivceImpl.java
package spring.demo.service.impl;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import spring.demo.dao.StudentDao;
import spring.demo.entity.Student;
import spring.demo.service.StudentService;
@Service
public class StudentServiceImpl implements StudentService {
@Autowired
private StudentDao dao;
@Override
@Transactional
public List<Student> findStudent() {
return dao.findAll();
}
@Override
@Transactional
public Student findStudent(long id) {
return dao.findById(id);
}
@Override
@Transactional
public void updateStudent(Student s) {
dao.update(s);
}
}Student DAO
src/main/java/spring/demo/dao/StudentDao.java
package spring.demo.dao;
import java.util.List;
import spring.demo.entity.Student;
public interface StudentDao {
Student findById(long id);
List<Student> findAll();
void update(Student s);
}src/main/java/spring/demo/dao/impl/StudentDaoImpl.java
package spring.demo.dao.impl;
import java.util.List;
import jakarta.persistence.Query;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
import spring.demo.dao.StudentDao;
import spring.demo.entity.Student;
@Repository
public class StudentDaoImpl implements StudentDao {
// 有多個sessionFactory 可以用Resource來指定
// @Resource(name = "sessionFactory")
// private SessionFactory sessionFactory;
@Autowired
private SessionFactory sessionFactory;
@Override
@Transactional
public Student findById(long id) {
String sql = "select * from Student where id = :id";
Query query = sessionFactory.getCurrentSession().createNativeQuery(sql).addEntity(Student.class);
query.setParameter("id", id);
return (Student) query.getSingleResult();
}
@Override
@Transactional
public List<Student> findAll() {
String sql = "select * from Student";
Query query = sessionFactory.getCurrentSession().createNativeQuery(sql).addEntity(Student.class);
@SuppressWarnings("unchecked")
List<Student> resultList = query.getResultList();
return resultList;
}
@Override
@Transactional
public void update(Student s) {
sessionFactory.getCurrentSession().update(s);
}
}WebSocket
src/main/java/spring/demo/ws/WebSocketConfig.java
package spring.demo.ws;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;
import org.springframework.web.socket.server.support.HttpSessionHandshakeInterceptor;
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry.addHandler(myHandler(), "/chat").setAllowedOrigins("*").addInterceptors(new HttpSessionHandshakeInterceptor());
}
@Bean
public WebSocketHandler myHandler() {
return new ChatHandler();
}
}src/main/java/spring/demo/ws/ChatHandshakeInterceptor.java
package spring.demo.ws;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.server.support.HttpSessionHandshakeInterceptor;
import java.util.Map;
@Component
public class ChatHandshakeInterceptor extends HttpSessionHandshakeInterceptor {
@Override
public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Map<String, Object> attributes) throws Exception {
System.out.println("Before Handshake");
// //在握手之前将HttpSession中的用户，copy放到WebSocket Session中
// if (request instanceof ServletServerHttpRequest){
// ServletServerHttpRequest servletServerHttpRequest=
// (ServletServerHttpRequest) request;
// HttpSession session=
// servletServerHttpRequest.getServletRequest().getSession(true);
// if (null!=session){
// User user=(User)session.getAttribute("user");
// //WebSocket Session
// attributes.put("user",user);
// }
// }
return super.beforeHandshake(request,response,wsHandler,attributes);
}
@Override
public void afterHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Exception ex) {
super.afterHandshake(request, response, wsHandler, ex);
}
}src/main/java/spring/demo/ws/ChatHandler.java
package spring.demo.ws;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.handler.TextWebSocketHandler;
import java.io.IOException;
import java.net.URI;
import java.util.Map;
import java.util.concurrent.CopyOnWriteArraySet;
@Component
public class ChatHandler extends TextWebSocketHandler {
private static CopyOnWriteArraySet<WebSocketSession> clients=new CopyOnWriteArraySet<WebSocketSession>();
private WebSocketSession wsSession = null;
private String username;
@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
this.wsSession = session;
String name = this.getAttribute(session, "username");
this.username = name;
clients.add(session);
String message = (username+" is in chatroom");
broadcastMessage(message);
}
private String getAttribute(WebSocketSession webSocketSession, String key) {
URI uri = webSocketSession.getUri();
//userid=123&dept=4403
String query = uri.getQuery();
if (null != query && !"".equals(query)) {
//??
String[] queryArr = query.split("&");
for (String queryItem : queryArr) {
//userid=123
String[] queryItemArr = queryItem.split("=");
if (2 == queryItemArr.length) {
if (key.equals(queryItemArr[0]))
return queryItemArr[1];
}
}
}
return "";
}
@Override
public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
// clients.remove(session.getId());
clients.remove(session);
}
public static CopyOnWriteArraySet<WebSocketSession> getClients() {
return clients;
}
@Override
protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
String payload = message.getPayload();
broadcastMessage(username + " broadcast: " + payload);
TextMessage s1 = new TextMessage(username+ " echo: " + payload);
session.sendMessage(s1);
}
void broadcastMessage(String json) throws IOException {
TextMessage message = new TextMessage(json);
for( WebSocketSession client: getClients()) {
client.sendMessage(message);
}
}
}web page
src/main/webapp/WEB-INF/pages/hello.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script src="<c:url value='/js/jquery-3.7.1.min.js' />"></script>
<title>HelloWorld</title>
</head>
<body>
<h1>Hello World!! Spring MVC</h1>
<input type="button" id="getAll" value="列出全部學生" />
</body>
<script type="text/javascript">
$(document).ready(function() {
if ('${message}' != '') {
alert('${message}')
}
$("#getAll").click(function() {
window.location.href = "<c:url value='/list' />"
});
})
</script>
</html>src/main/webapp/WEB-INF/pages/list.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script src="<c:url value='/js/jquery-3.7.1.min.js' />"></script>
<title>List</title>
</head>
<body>
<h1>學生列表</h1>
<form id="viewDetail" action="view" method="post">
<input name="id" type="hidden" /> <input name="type" type="hidden" />
<table>
<c:if test="${resultList.size()>0}">
<tr>
<td>學號</td>
<td>名字</td>
<td>操作</td>
</tr>
<c:forEach items="${resultList}" var="result" varStatus="s">
<tr>
<td>${result.id}</td>
<td>${result.name}</td>
<td><input type="button" value="查看"
onclick="view(${result.id},'view')"></td>
</tr>
</c:forEach>
</c:if>
</table>
</form>
</body>
<script type="text/javascript">
$(document).ready(function() {
})
function view(id,type){
$('input[name="id"]').val(id);
$('input[name="type"]').val(type);
$("#viewDetail").submit();
}
</script>
</html>src/main/webapp/WEB-INF/pages/view.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script src="<c:url value='/js/jquery-3.7.1.min.js' />"></script>
<title>View Detail</title>
</head>
<body>
<h1>詳細資料</h1>
<form:form id="viewDetail" action="view" method="post" modelAttribute="s">
<form:input path="id" type="hidden" /> <input name="type" type="hidden" />
<table>
<tr>
<td>學號</td>
<td>名字</td>
<td>數學成績</td>
</tr>
<tr>
<td>${s.id}</td>
<c:choose>
<c:when test="${type eq 'view'}">
<td>${s.name}</td>
<td align="center">${s.mathScore}</td>
</c:when>
<c:otherwise>
<td><form:input path="name" /> </td>
<td align="center"><form:input path="mathScore" /></td>
</c:otherwise>
</c:choose>
</tr>
</table>
</form:form>
<input type="button" value="回上ㄧ頁" onclick="history.back()" />
<c:choose>
<c:when test="${type eq 'view'}">
<input type="button" value="修改"
onclick="modifyDetail(${s.id}),'modify'" />
</c:when>
<c:otherwise>
<input type="button" value="確認修改" onclick="update()" />
</c:otherwise>
</c:choose>
</body>
<script type="text/javascript">
$(document).ready(function() {
})
function modifyDetail(id,type){
$('input[name="id"]').val(id);
$('input[name="type"]').val(type);
$("#viewDetail").submit();
}
function update(){
$("#viewDetail").attr("action","update").submit();
}
</script>
</html>啟動測試
Student 網頁 http://localhost:8080/smvc/hello
WebSocket 網頁 http://localhost:8080/smvc/ws.jsp
References
建立一個SpringMVC + Spring + Hibernate 的Web專案 - HackMD
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