近期完成了一个小项目,代码量虽然较少,但是用到了一些之前没用过的东西,在此整合记录一下。
项目地址:https://github.com/FateSolo/SSM-Test
项目环境:
- Ubuntu 14.04.3
- Intellij IDEA 15.0.2
- Gradle 2.5
- JDK 1.6.0_38
- Tomcat 7.0.67
- Nginx 1.4.6
应用技术:
- Spring 4.2.4
- Spring MVC 4.2.4
- Mybatis 3.3.0
- Druid 1.0.9
- Ehcache 2.6.9
- Gson 2.5
- Dom4j 1.6.1
- Poi 3.9
- Tomcat 7.0.47 (WebSocket)
1. 创建项目:
1) 打开IDEA,点击Create New Project,在左侧边栏找到Gradle,并勾选Java和Web,JDK选择1.6.0_38。
2) 点击Next后,GroupId可以填写为包名,这里我写为com.fatesolo;ArtifactId可以填写为项目名,这里我写为SSM-Test;Version不需要变动。
3) 点击Next后,勾选Use auto-import和Create directories for…,Gradle选择2.5,JDK选择1.6.0_38。
4) 点击Next后,直接Finish即完成了项目的创建。
2. 基础配置
1) 点击File -> Project Structure,选择Modules,在SSM-Test下选择Web Gradle…,如图:
2) 点击Deployment Descriptors栏右侧的绿色加号,点击web.xml,在弹出的对话框中,在SSM-Test与WEB-INF路径之间添加src/main/webapp/,点击确定即完成了web.xml的创建。
3) 在src/main/java中创建com.fatesolo,并创建controller, service, mapper, model, filter, socket, util七个子包。
4) 在src/main/resources中创建mapper文件夹,该文件夹主要存放实现数据访问层具体逻辑的xml文件,一般一个xml对应一个mapper子包中的接口。至此,基础配置完成,项目目录结构如图所示:
3. 编写web.xml
1) 打开web.xml,编写如下配置:1
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84<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
version="3.0">
<!-- Spring -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-common.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Spring MVC -->
<servlet>
<servlet-name>springMVC</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- Web Socket -->
<servlet>
<servlet-name>socket</servlet-name>
<servlet-class>com.fatesolo.socket.MyWebSocketServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>socket</servlet-name>
<url-pattern>/socket</url-pattern>
</servlet-mapping>
<!-- Session 过期时间 -->
<session-config>
<session-timeout>120</session-timeout>
</session-config>
<!-- admin权限过滤器 -->
<filter>
<filter-name>sessionFilter</filter-name>
<filter-class>com.fatesolo.filter.SessionFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>sessionFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- 编码过滤器 -->
<filter>
<filter-name>encodingFilter</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>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
2) 导入第三方库,在build.gradle的dependencies中,加入如下两句话:1
compile 'org.springframework:spring-web:4.2.4.RELEASE'
compile 'org.springframework:spring-webmvc:4.2.4.RELEASE'
3) 在socket包中创建MyWebSocketServlet类,在filter包中创建SessionFilter类,在resources文件夹内新建spring-common.xml和spring-mvc.xml。
4. 编写相关配置文件
1) 创建并编写jdbc.properties文件,代码如下:1
jdbc.url=jdbc:mysql://localhost:3306/TestDB?useUnicode=true&characterEncoding=utf8&mysqlEncoding=utf8
jdbc.username=root
jdbc.password=123456
druid.initialSize=5
druid.minIdle=5
druid.maxActive=50
注意数据库名、用户名和密码都更改成你自己的,下面的Druid配置可以根据需要自行修改。
2) 创建并编写log4j.properties文件,代码如下:1
log4j.rootLogger=INFO, CONSOLE, FILE
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=[%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
log4j.appender.FILE=org.apache.log4j.RollingFileAppender
log4j.appender.FILE.File=../logs/log4j.log
log4j.appender.FILE.MaxFileSize=1MB
log4j.appender.FILE.Append=true
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.ConversionPattern=[%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
3) 创建并编写ehcache.xml文件,代码如下:1
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27<?xml version="1.0" encoding="UTF-8"?>
<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd">
<diskStore path="java.io.tmpdir"/>
<defaultCache maxElementsInMemory="100"
eternal="false"
timeToIdleSeconds="30"
timeToLiveSeconds="30"
overflowToDisk="false"/>
<!-- 获取最新的十条数据, 永不过期, 当有数据更新时手动清除缓存 -->
<cache name="listCache"
maxElementsInMemory="10"
eternal="true"
overflowToDisk="false"/>
<!-- 定期取得最新的腾讯视频地址, 四小时自动清除缓存 -->
<cache name="urlCache"
maxElementsInMemory="10"
eternal="false"
timeToIdleSeconds="0"
timeToLiveSeconds="14400"
overflowToDisk="false"/>
</ehcache>
4) 打开spring-mvc.xml,编写如下配置:1
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17<?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
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:component-scan base-package="com.fatesolo.controller"/>
<mvc:annotation-driven/>
</beans>
5) 打开spring-common.xml,编写如下配置:1
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80<?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:tx="http://www.springframework.org/schema/tx"
xmlns:cache="http://www.springframework.org/schema/cache"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.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/cache
http://www.springframework.org/schema/cache/spring-cache.xsd">
<context:component-scan base-package="com.fatesolo.service"/>
<!-- 引入 jdbc.properties 配置文件 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 数据源, 使用了Druid连接池 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
<!-- 基本属性 url、user、password -->
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<!-- 配置初始化大小、最小、最大 -->
<property name="initialSize" value="${druid.initialSize}"/>
<property name="minIdle" value="${druid.minIdle}"/>
<property name="maxActive" value="${druid.maxActive}"/>
<!-- 配置获取连接等待超时的时间 -->
<property name="maxWait" value="60000"/>
<!-- 配置间隔多久才进行一次检测,检测需要关闭的空闲连接,单位是毫秒 -->
<property name="timeBetweenEvictionRunsMillis" value="60000"/>
<!-- 配置一个连接在池中最小生存的时间,单位是毫秒 -->
<property name="minEvictableIdleTimeMillis" value="300000"/>
<property name="validationQuery" value="SELECT 'x'"/>
<property name="testWhileIdle" value="true"/>
<property name="testOnBorrow" value="false"/>
<property name="testOnReturn" value="false"/>
<property name="poolPreparedStatements" value="false"/>
</bean>
<!-- Mybatis -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="typeAliasesPackage" value="com.fatesolo.model"/>
<property name="mapperLocations" value="classpath:mapper/*Mapper.xml"/>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.fatesolo.mapper"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>
<!-- 配置事务 -->
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<tx:annotation-driven transaction-manager="txManager"/>
<!-- Ehcache -->
<bean id="cacheManagerFactory" class="org.springframework.cache.ehcache.EhCacheManagerFactoryBean">
<property name="configLocation" value="classpath:ehcache.xml"/>
</bean>
<bean id="cacheManager" class="org.springframework.cache.ehcache.EhCacheCacheManager">
<property name="cacheManager" ref="cacheManagerFactory"/>
</bean>
<cache:annotation-driven cache-manager="cacheManager"/>
</beans>
6) 此时发现IDEA给出了如下图提示:
点击Create Spring facet,创建成如下图样式并确定。
7) 发现缺少相关class,再打开build.gradle,加入如下依赖:1
compile 'com.alibaba:druid:1.0.9'
compile 'net.sf.ehcache:ehcache-core:2.6.9'
compile 'org.mybatis:mybatis:3.3.0'
compile 'org.mybatis:mybatis-spring:1.2.3'
compile 'org.springframework:spring-context-support:4.2.4.RELEASE'
compile 'org.springframework:spring-jdbc:4.2.4.RELEASE'
至此,Spring、SpringMVC、Mybatis、Druid、Ehcache已经配置并整合完毕。
5. 实现具体功能
实现这样一个功能:用户打开网页后可以观看腾讯视频,可以看到最新的十条留言,可以自行留言,当其他人留言时可以实时更新;admin可以登录到后台数据管理系统,可以查看所有留言,可以下载为Excel格式。
1) 首先在MySQL数据库中创建数据库与表,并编写对应的实体类,这里只给出实体类的代码:1
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45package com.fatesolo.model;
public class Message {
private long id;
private String name;
private String message;
private String createTime;
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 getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public String getCreateTime() {
return createTime;
}
public void setCreateTime(String createTime) {
this.createTime = createTime;
}
}
1 | package com.fatesolo.model; |
2) 创建数据访问接口1
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20package com.fatesolo.mapper;
import com.fatesolo.model.Message;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface MessageMapper {
void add(Message message);
int getCount();
/*
* @param m : 从第m+1条数据开始获取
* @param n : 获取n条数据
*/
List<Message> getList(@Param(value="m") int m, @Param(value="n") int n);
}
1 | package com.fatesolo.mapper; |
3) 在src/main/resources/mapper中创建对应的xml文件1
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20<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.fatesolo.mapper.MessageMapper">
<insert id="add" parameterType="Message" useGeneratedKeys="true" keyProperty="id">
insert into Message(name, message, createTime) values(#{name}, #{message}, #{createTime})
</insert>
<select id="getCount" resultType="int">
select count(1) from Message
</select>
<select id="getList" resultType="Message">
select id, name, message,
FROM_UNIXTIME(createTime/1000, '%Y-%m-%d %H:%i:%s') createTime from Message
order by createTime desc limit #{m}, #{n}
</select>
</mapper>
1 | <?xml version="1.0" encoding="UTF-8"?> |
4) 编写工具类1
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32package com.fatesolo.util;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.TimeZone;
public class DateTimeUtil {
//获取当前毫秒时间
public static String getCurrentTimeMillis() {
TimeZone.setDefault(TimeZone.getTimeZone("GMT+8"));
return String.valueOf(System.currentTimeMillis());
}
//毫秒时间转换为日期时间格式
public static String millisToDateTime(String millis) {
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(Long.parseLong(millis));
return new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(calendar.getTime());
}
//毫秒时间转换为日期格式
public static String millisToDate(String millis) {
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(Long.parseLong(millis));
return new SimpleDateFormat("yyyy-MM-dd").format(calendar.getTime());
}
}
1 | package com.fatesolo.util; |
1 | package com.fatesolo.util; |
1 | package com.fatesolo.util; |
1 | package com.fatesolo.util; |
1 | package com.fatesolo.util; |
对于Response.PATH,在Nginx中对应的配置如下:1
server {
listen 80;
server_name localhost;
location ^~ /message/ {
root /etc/nginx/html/static;
index index.html index.htm;
access_log off;
expires 5d;
}
location /messageweb/ {
proxy_pass http://127.0.0.1:8080;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
}
}
第一个location对应静态资源,路径应与Response.PATH一致,root可自行修改,第二个location是转发配置,路径应与项目在tomcat中的名称一致。
引入相关依赖:1
compile 'com.google.code.gson:gson:2.5'
compile 'dom4j:dom4j:1.6.1'
compile 'org.apache.poi:poi:3.9'
5) 创建Service1
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68package com.fatesolo.service;
import com.fatesolo.mapper.MessageMapper;
import com.fatesolo.model.Message;
import com.fatesolo.util.DateTimeUtil;
import com.fatesolo.util.HttpUtil;
import com.fatesolo.util.QuickPager;
import org.springframework.cache.annotation.CacheEvict;
import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import javax.annotation.Resource;
import java.util.List;
@Service
@Transactional(rollbackFor = Exception.class)
public class MessageService {
@Resource
private MessageMapper mapper;
public boolean add(Message message) {
message.setCreateTime(DateTimeUtil.getCurrentTimeMillis());
mapper.add(message);
message.setCreateTime(DateTimeUtil.millisToDateTime(message.getCreateTime()));
return message.getId() != 0;
}
//获取最新十条数据
@Cacheable(value = "listCache")
public List<Message> getList() {
return mapper.getList(0, 10);
}
//手动清除缓存
@CacheEvict(value = "listCache", allEntries = true)
public void removeList() {
}
//获取腾讯视频真实url
@Cacheable(value = "urlCache")
public String getUrl() {
return HttpUtil.getVideoUrl();
}
//为防止url失效, 留出手动清除缓存接口
@CacheEvict(value = "urlCache", allEntries = true)
public void removeUrl() {
}
//获取分页数据
public QuickPager<Message> getQuickPager(String currPage, String pageSize) {
QuickPager<Message> pager = new QuickPager<Message>(currPage, pageSize);
pager.setTotalRows(mapper.getCount());
pager.setList(mapper.getList((pager.getCurrPage() - 1) * pager.getPageSize(), pager.getPageSize()));
return pager;
}
//获取所有数据
public List<Message> getAll() {
return mapper.getList(0, mapper.getCount());
}
}
1 | package com.fatesolo.service; |
6) 编写Web Socket1
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15package com.fatesolo.socket;
import org.apache.catalina.websocket.StreamInbound;
import org.apache.catalina.websocket.WebSocketServlet;
import javax.servlet.http.HttpServletRequest;
public class MyWebSocketServlet extends WebSocketServlet {
@Override
protected StreamInbound createWebSocketInbound(String subProtocol, HttpServletRequest request) {
return new MyMessageInbound();
}
}
1 | package com.fatesolo.socket; |
1 | package com.fatesolo.socket; |
引入相关依赖:1
compile 'org.apache.tomcat:tomcat-catalina:7.0.47'
compile 'org.apache.tomcat:tomcat-coyote:7.0.47'
这是Tomcat的实现,现在已经不推荐使用。但因为项目需要,使用了JDK 1.6,而推荐的JSR-356标准的WebSocekt至少需要JDK 1.7。当你使用了JDK 1.7及以上时,可以使用Spring提供的WebSocket,那是基于JSR-356标准的实现。
另外,因为使用了Nginx进行反向代理,所以需要在相应配置文件中加入如下配置,令Nginx支持对socket的转发:1
location /messageweb/socket {
proxy_pass http://127.0.0.1:8080;
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_read_timeout 86400;
}
7) 创建Controller1
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44package com.fatesolo.controller;
import com.fatesolo.model.Message;
import com.fatesolo.service.MessageService;
import com.fatesolo.socket.WebSocketManager;
import com.fatesolo.util.Response;
import org.springframework.web.bind.annotation.*;
import javax.annotation.Resource;
import java.util.HashMap;
import java.util.Map;
@RestController
@RequestMapping(value = "/message", produces = "application/json;charset=UTF-8")
public class MessageController {
@Resource
private MessageService service;
//当有数据更新时, 清空缓存, 并向所有建立socket连接的用户发送实时数据
@RequestMapping(value = "", method = RequestMethod.POST)
public String add(Message message) {
if (service.add(message)) {
service.removeList();
WebSocketManager.sendMessage(Response.toJson(message));
return Response.success("AddSuccess");
} else {
return Response.failure("AddFailure");
}
}
//取得前十条数据和腾讯视频真实地址
@RequestMapping(value = "", method = RequestMethod.GET)
public String getList() {
Map<String, Object> map = new HashMap<String, Object>();
map.put("list", service.getList());
map.put("url", service.getUrl());
return Response.toJson(map);
}
}
1 | package com.fatesolo.controller; |
8) 编写admin权限过滤器1
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28package com.fatesolo.filter;
import com.fatesolo.util.Response;
import org.springframework.web.filter.OncePerRequestFilter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
public class SessionFilter extends OncePerRequestFilter {
//拦截除了login外的所有admin请求, session不存在的自动跳转到登录页
@Override
protected void doFilterInternal(HttpServletRequest request,
HttpServletResponse response,
FilterChain filterChain) throws ServletException, IOException {
String uri = request.getRequestURI();
if (uri.contains("admin") && !uri.contains("admin/login") && request.getSession().getAttribute("user") == null) {
response.sendRedirect(Response.PATH + "login.html");
} else {
filterChain.doFilter(request, response);
}
}
}
至此完成了全部的具体逻辑的实现。
6. 项目运行
1) 打开build.gradle,添加最后的项目依赖:1
compile 'mysql:mysql-connector-java:5.1.8'
compile 'log4j:log4j:1.2.16'
2) 点击Run菜单栏的Edit Configurations,点击绿色加号添加一个Tomcat Server,如图:
3) 点击右侧绿色加号,选择Artifacts,点击确定。
4) 右侧的Application context修改为/messageweb,点击确定。
5) 在MySQL中,选择TestDB,在user表中添加一个admin用户,密码请自行设定并使用MD5加密。
6) 打开Tomcat的conf/server.xml,将Connector修改为如下配置:1
<Connector executor="tomcatThreadPool" port="8080" protocol="org.apache.coyote.http11.Http11NioProtocol" maxThreads="200" maxHttpHeaderSize="8192" emptySessionPath="true" connectionTimeout="20000" enableLookups="false" redirectPort="8443" URIEncoding="UTF-8"/>
7) 打开Tomcat的conf/context.xml,加入如下配置:1
<Loader delegate="true"/>
8) 运行Tomcat,访问http://localhost:8080/messageweb/message ,得到如下JSON结果:1
{"data":{"list":[],"url":"http://111.202.98.157/vkp.tc.qq.com/f0019r1sytg.mp4?vkey=C27DE1EE6C583432FF4CC7FD843718AA639A2E41506E0F4276B9640910029E7CEEDE7F98F1C5164339961BC63D3C6D22AF5EEE98F0583B42D719870F3372F77E2904AD01C82D3BE4D28B609CB7B4E75CEE88C408CC0707D3&br=62474&platform=0&fmt=mp4&level=0&type=mp4"},"resCode":"000000","resMsg":"成功"}
至此,项目已经搭建整合完成。
作者 [@FateSolo]
2016 年 2月 18日