帝王谷资源网

AJAX 自学练习 无刷新提交并修改数据库数据并显示
网络编程 2024/12/23 佚名
3 2
帝王谷资源网 Design By www.wdxyy.com
request.jsp页面中有rocarsId,和ccrn两个text。
对应在数据库中表格 rocars表的msg_id,ccrn两个字段。现在要实现在界面上修改ccrn的值，ajax提交到response.jsp页面，并调用RocarsEntiy.updateCcrn方法更新对应的ccrn，最后无刷新显示
代码：
request.jsp
复制代码 代码如下:
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<!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">
<title>Insert title here</title>
<script language="javascript"><!--
function GetXmlHttpObject(){
    var xmlHttp = null;
    try{
        xmlHttp = new XMLHttpRequest();
    }catch(e){
        try{
            xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
        }catch(e){
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
    }
    return xmlHttp;

}
function updateCcrn(rocarsId,ccrn){
alert(rocarsId)
alert(ccrn)
    xmlHttp = GetXmlHttpObject();
    if(xmlHttp == null){
        alert ("you browser don't support the ajax");
         return;
    }
    var url = "./response.jsp";
    url = url + "?rocarsId="+ rocarsId;
    url = url + "&ccrn="+ ccrn;
    url = url + "&sid ="+ Math.random();
    xmlHttp.onreadystatechange = stateChanged;
    xmlHttp.open("GET", url, true);
    xmlHttp.send(null);
}
function getCcrn(str){
    xmlHttp = GetXmlHttpObject();
    if(xmlHttp == null){
        alert ("you browser don't support the ajax");
         return;

    }
    var url = "./response.jsp";
    url = url + "?q="+ str;
    url = url + "&sid ="+ Math.random();
    xmlHttp.onreadystatechange = stateChanged;
    xmlHttp.open("GET", url, true);
    xmlHttp.send(null);
}
function stateChanged()
{
    if(xmlHttp.readyState==4)
    {
        document.getElementById("rocarsccrn").value = xmlHttp.responseText;
    }
}
// --></script>
</head>
<body>
<form name="form1" action="" method="post">
    <label>rocarsId:</label><input type="text" name="rocarsId" value="140" />
    <label>ccrn:</label><input type="text" id="rocarsccrn" name="rocarsccrn" onchange="updateCcrn(document.form1.rocarsId.value,this.value)"/>
</form>
</body>
</html>

response.jsp
复制代码 代码如下:
<%@ page language="java" contentType="text/plain; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="com.lwf.eus.util.*,java.util.*,com.lwf.eus.entity.*,com.lwf.eus.bean.*" %>
<%
    String rocarsId = request.getParameter("rocarsId");
    String ccrn = request.getParameter("ccrn");
    System.out.println("rocarsId:" + rocarsId);
    System.out.println("ccrn:" + ccrn);
    RocarsEntity.updateCcrnById(rocarsId,ccrn);
    out.print(ccrn);
%>

RocarsEntity.java
复制代码 代码如下:
package com.lwf.eus.entity;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Vector;
import com.lwf.eus.bean.RocarsBean;
import com.lwf.eus.util.ConnectionManager;
public class RocarsEntity {
    public static Vector getRocarsList() {
        Vector vRocars = new Vector();
        //Connection conn = ConnectionManager.getConnection();
        Connection conn = ConnectionManager.getConnectionFromDS();
        Statement st = ConnectionManager.createStatement(conn);
        String sql = "select msg_id,ccrn from rocars";
        ResultSet rs = null;
        try {
            rs = st.executeQuery(sql);
            while (rs.next()) {
                RocarsBean rocars = new RocarsBean();
                rocars.setRocarsId(rs.getString(1));
                rocars.setCcrn(rs.getString(2));
                vRocars.addElement(rocars);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            try {
                if (rs != null) {
                    rs.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            try {
                if (st != null) {
                    st.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            try {
                if (conn != null) {
                    conn.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return vRocars;
        }

    }

    public static RocarsBean getRocarsListById(String rocarsId){
        Connection conn = ConnectionManager.getConnectionFromDS();
        Statement st = ConnectionManager.createStatement(conn);
        String sql = "select * from rocars where msg_id=" + rocarsId;
        ResultSet rs = null;
        RocarsBean rocars= null;
        try {
            rs = st.executeQuery(sql);
            rocars = new RocarsBean();
            while (rs.next()) {                
                rocars.setRocarsId(rs.getString("msg_id"));
                rocars.setCcrn(rs.getString("ccrn"));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            try {
                if (rs != null) {
                    rs.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            try {
                if (st != null) {
                    st.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            try {
                if (conn != null) {
                    conn.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            return rocars;
        }
    }
    public static void updateCcrnById(String rocarsId, String ccrn)
    {
        Connection conn = null;
        Statement stmt = null;
        try {
            conn = ConnectionManager.getConnectionFromDS();
            stmt = ConnectionManager.createStatement(conn);
            String sqlStr = "update rocars set ccrn= '"+ ccrn + "'" + "where msg_id=" + rocarsId ;
            stmt.executeUpdate(sqlStr);
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally{

            try {
                if (stmt != null) {
                    stmt.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
            try {
                if (conn != null) {
                    conn.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}

ConnectionManager.java
这里可以直接使用JDBC也可以调用weblogic的数据源JNDI。
复制代码 代码如下:
package com.lwf.eus.util;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.sql.DataSource;
public class ConnectionManager {
    public static Connection getConnection(){
        Connection conn = null;
        String url = "jdbc:postgresql://192.168.0.180/getseus";
        String userName = "getsdbadmin";
        String pwd = "powerdb";
        try {
            Class.forName("org.postgresql.Driver").newInstance();
            conn = DriverManager.getConnection(url,userName,pwd);
        } catch (SQLException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (Exception e){
            e.printStackTrace();
        }

        return conn;
    }

    public static Connection getConnectionFromDS(){
        Connection conn = null;
        Context ctx = null;
        try {
            ctx = new InitialContext();
            DataSource ds = (DataSource)ctx.lookup("JNDIPG");
            conn = ds.getConnection();
        } catch (NamingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        return conn;

    }

    public static Statement createStatement(Connection conn){
        Statement st = null;
            try {
                st = conn.createStatement();

            } catch (SQLException e) {
                e.printStackTrace();
            }
        return st;
    }
}
标签：
无刷新提交,修改数据库数据,显示
帝王谷资源网 Design By www.wdxyy.com
广告合作：本站广告合作请联系QQ：858582 申请时备注：广告合作（否则不回）
免责声明：本站文章均来自网站采集或用户投稿，网站不提供任何软件下载或自行开发的软件！ 如有用户或公司发现本站内容信息存在侵权行为，请邮件告知！ 858582#qq.com
帝王谷资源网 Design By www.wdxyy.com
www.wdxyy.com 帝王谷资源网
139,976互联网资源
144,792高清电影
21,817无损音乐
631,128技术资源

更新日志

友情链接

杰晶网络 DDR爱好者之家 桃源资源网 杰网资源 富贵资源网 南强小屋 铁雪资源网 幽灵资源网 万梅资源网 狼山资源网 白云岛资源网 昆仑资源网 相思资源网 明霞山资源网 内蒙古资源网 黑松山资源网 茶园资源网 饿虎岗资源网 大旗谷资源网 常春岛资源网 岱庙资源网 兴国资源网 快活林资源网 蝙蝠岛资源网 帝王谷资源网 白云城资源网 伏龙阁资源网 清风细雨楼 天枫庄资源网 圆月山庄资源网 无争山庄资源网 神水资源网 移花宫资源网 神剑山庄资源网 无为清净楼资源网 金钱帮资源网 丐帮资源网 华山资源网 极乐门资源网 小李飞刀资源网 凤求凰客栈 风云阁资源网 金狮镖局 鸳鸯亭资源网 千金楼资源网 更多链接