站内信系统实现-优快云博客

本文链接：https://blog.youkuaiyun.com/Frank_cxx/article/details/76145747

list.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c"  uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="f" uri="http://java.sun.com/jsp/jstl/fmt" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>发送页面</title>
	<script type="text/javascript" src="static/js/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(function(){

		$(".changeusers").change(function(){
		var uid=$("#uid").val();
	 window.location.href="message/getMessagesByUser.do?uid="+uid;  
			}); 
			
	$(".btn").click(function(){
	//自定义标签
	/* var mid=$(this).attr("btn");
	 window.location.href="message/delete.do?mid="+mid;  
	 */
	/* 方法2:
	 $('.btn')获取的是一组标签
	var mid=$(this).parent().prev().prev().prev().prev().text();
	 alert(mid); */
	 var mid=$(this).parent().parent().find("td:eq(0)").text();
	 alert(mid);
	  window.location.href="message/delete.do?mid="+mid;
	});		

});
</script>
  </head>
  
  <body>
   <center>
         <h1>站内信查看页面</h1>
         <select class="changeusers" id="uid" >
         <option>---请选择---</option>
	     <option value="0">所有用户</option>
		<c:forEach items="${users}" var="u">
			<option value="${u.uid}">${u.uname}</option>
		</c:forEach>
	</select>
	<br><br><br>
  <table border="2" bgcolor="brown">
		 <tr>
          <td>消息ID</td>
		  <td>消息内容</td> 
	      <td>时间</td>
	      <td>接受人</td>
	       <td>操作</td>
		 </tr>
		<c:forEach items="${list }" var="m">
		<tr>
			<td >${m.mid}</td>
			<td>${m.content}</td>
			<td><f:formatDate value='${m.createtime}' pattern="yyyy-MM-dd hh:mm:ss"/></td>
			<td>${m.user.uname}</td>
			<td><button class="btn" btn="${m.mid }" >删除</button></td>
		</tr>
		</c:forEach>
        <tr>
			 
       </tr>
       
  </table>
 
  </center>
        
  
  </body>
</html>

send.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="c"  uri="http://java.sun.com/jsp/jstl/core"%>

<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    
    <title>发送页面</title>
	<script type="text/javascript" src="static/js/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(function(){
alert()
$("#btn").click(function(){

       var content=$("#msg").val();
       if($("input[type=checkbox]:checked").length==0){
  			alert("请勾选择用户");
  			return;
  		}
  		 // 不用ajax时,可以用超链接去跳转
  		/* var uids=new Array();
  		$(":checkbox[name='uids']:checked").each(function(){
  		uids.push($(this).val());
  		});
  			alert(uids);
  			alert(content); */
  	$(":checkbox[name='uids']:checked").each(function(){		
  	var uid=$(this).val();

  	$.ajax({
  	url:"message/insert.do",
  	data:{"content":content,"uid":uid},
  		dataType:"json",
  	success:function(data){
  	alert("发送成功！！");
  	//清空文本域
  	$("#msg").val("");
  	//清空多选框的值
  $("input:checked").prop("checked",false);
  	}
  	
  
  	});
});
});
});
</script>
  </head>
  
  <body>
   <center>
         <h1>站内信发送页面</h1>
  <table border="2" bgcolor="brown">

		 <tr >
		  <td>请选择联系人</td>
			 <td>
			 	<c:forEach items="${users}" var="u">
			 	<input type="checkbox" name="uids" value="${u.uid}"/>
			 	${u.uname}
			 	</c:forEach>
			 </td>		  
		 </tr>
		
        <tr>
			 <td>请输入消息内容</td>
			 <td>
			 <textarea id="msg" rows="4" cols="60"></textarea>
			 </td>
       </tr>
       
  </table>
  <input type="button" id="btn"  value="发送" >
  </center>
        
  
  </body>
</html>

MessageMapper.xml

<?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.frank.dao.MessageMapper">
<insert id="insert" parameterType="message">
	insert into message (content,createtime,u_id) values (#{content},#{createtime},#{user.uid})

</insert>
	
<resultMap type="message" id="messagemap">
		<id column="mid" property="mid"/>
		<result column="content" property="content"/>
		<result column="createtime" property="createtime"/>
		<association property="user" javaType="user">
		<id column="uid" property="uid"/>
		<result column="uname" property="uname"/>
		<result column="upass" property="upass"/>
		<result column="ugender" property="ugender"/>
		</association>
	</resultMap>
	
	<select id="getMessagesByUser" parameterType="user" resultMap="messagemap">
		select m.*,u.uname from message  m,user  u where m.u_id=u.uid
		<if test="uid!=0">
			and m.u_id=#{uid}
		</if>
	</select>
	<delete id="delete" parameterType="int">
	delete from message where mid=#{mid}
	</delete>
</mapper>

MessageMapper接口

public interface MessageMapper {
	public void insert(Message msg);
	
	public void delete(int mid);

   public List<Message> getMessagesByUser(User user);	
}

MessageController类

@Controller
@RequestMapping("message")
public class MessageController {

	@Autowired
	private MessageService service;
	
	@Autowired
	private UserService userService;
	
	@ResponseBody
	@RequestMapping("insert")
	public String insert(Message m,String content,int uid){
		m.setContent(content);
		m.setCreatetime(new Date());
		m.setUser(new User(uid));
		service.insert(m);
	return "ok";	
	};

	@RequestMapping("delete")
	public String delete(int mid){
		service.delete(mid);
		return "redirect:select.do";
	}
	//public List<Message> getMessagesByUser(User user);	
	@RequestMapping("select")
	public String getMessagesByUser(Model model,HttpSession session) {
		List<User> users = userService.selectUsers();
		session.setAttribute("users", users);
		List<Message> list= service.getMessagesByUser(new User());
		model.addAttribute("list", list);
		return "list";
	}
	
	
	@RequestMapping("getMessagesByUser")
	public String getMessagesByUsers(int uid,Model model) {
	User user = new User();
	System.out.println("-------:"+uid);
		user.setUid(uid);
		List<Message> list = service.getMessagesByUser(user);
		for (Message message : list) {
			System.out.println(message);
		}
				model.addAttribute("list",list);
				return "list";
	}
}

ssm练习（发送信息）