java基于servlet+maven+mybatis+websocket聊天，包括单聊
和聊
运⾏环境：jdk1.8
apache-tomcat-8.0.30
功能：发送⽂本、qq表情、图⽚、视频的组合消息，发送语⾳，语⾳⽀持（⽕狐，⾕歌，ie，360等浏览器），发送附件消息并可以下载，消息撤回
对⼿机做单独的web页⾯适配。
运⾏效果图-电脑版：
单聊界⾯：
聊界⾯：
⼿机端-效果图：
框架搭建：
1.新建maven项⽬
maven依赖
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>            <version>3.1.0</version>
</dependency>
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<dependency>
<groupId>taglibs</groupId>
<artifactId>standard</artifactId>
<version>1.1.2</version>
</dependency>
<!-- mybatis包 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>1.0.18</version>
</dependency>
<dependency>
<groupId&batis</groupId>
<artifactId>mybatis</artifactId>
<version>3.1.1</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>        <version>5.1.27</version>
</dependency>
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi</artifactId>
<version>3.15</version>
servlet和tomcat的关系</dependency>
<!-- log4j需要的jar包 -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.22</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.22</version>
</dependency>
<dependency>
<groupId>net.sf.json-lib</groupId>
<artifactId>json-lib</artifactId>
<version>2.4</version>
<classifier>jdk15</classifier><!--指定jdk版本-->
</dependency>
<!-- servlet -->
<!--        ⽂件上传 -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.2</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.7</version>
</dependency>
需要在build path中单独引⼊tomcat  lib下⾯的websocket-api.jar  ⽂件2.在l中配置session过滤器 ，⽤于登录超时跳转到登录页⾯
<filter>
<filter-name>SessionFilter</filter-name>
<filter-class>com.zkkj.chat.filter.SessionFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>SessionFilter</filter-name>
<url-pattern>/group/*</url-pattern>
<url-pattern>/loginSuccess/*</url-pattern>
<dispatcher>FORWARD</dispatcher>
<dispatcher>REQUEST</dispatcher>
</filter-mapping>
SessionFilter.java
import java.io.IOException;
import java.util.Map;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class SessionFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
// TODO Auto-generated method stub
}
@Override
public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
// TODO Auto-generated method stub
HttpServletRequest request = (HttpServletRequest) arg0;
HttpServletResponse response = (HttpServletResponse) arg1;
HttpSession session = Session();
//判断sessin是否过期
Map userMap = (Map) Attribute("userSession");
if(userMap == null){
//跳转⾄登录页⾯
response.sendRedirect("/chat/index");
}else{
arg2.doFilter(request, response);
}
}
@Override
public void destroy() {
// TODO Auto-generated method stub
}
}
3.在l中配置，⽤于项⽬启动后加载配置⽂件，启动定时器检测⽤户在线状态等操作
<listener>
<description>ServletContextListener</description>
<listener-class>com.zkkj.chat.listener.ContextInitListener</listener-class>
</listener>
ContextInitListener.java

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