java进度条代码大全进度条代码怎么写

Java中如何实现进度条效果

代码如下：import java.awt.Color; import java.awt.Toolkit; import javax.swing.ImageIcon; import javax.swing.JLabel; import javax.swing.JOptionPane; import javax.swing.JProgressBar; import javax.swing.JWindow; @SuppressWarnings("serial") public class Demo extends JWindow implements Runnable { // 定义加载窗口大小 public static final int LOAD_WIDTH = 455; public static final int LOAD_HEIGHT = 295; // 获取屏幕窗口大小 public static final int WIDTH = Toolkit.getDefaultToolkit().getScreenSize().width; public static final int HEIGHT = Toolkit.getDefaultToolkit().getScreenSize().height; // 定义进度条组件 public JProgressBar progressbar; // 定义标签组件 public JLabel label; // 构造函数 public Demo() { // 创建标签,并在标签上放置一张图片 label = new JLabel(new ImageIcon("images/background.jpg")); label.setBounds(0, 0, LOAD_WIDTH, LOAD_HEIGHT - 15); // 创建进度条 progressbar = new JProgressBar(); // 显示当前进度值信息 progressbar.setStringPainted(true); // 设置进度条边框不显示 progressbar.setBorderPainted(false); // 设置进度条的前景色 progressbar.setForeground(new Color(0, 210, 40)); // 设置进度条的背景色 progressbar.setBackground(new Color(188, 190, 194)); progressbar.setBounds(0, LOAD_HEIGHT - 15, LOAD_WIDTH, 15); // 添加组件 this.add(label); this.add(progressbar); // 设置布局为空 this.setLayout(null); // 设置窗口初始位置 this.setLocation((WIDTH - LOAD_WIDTH) / 2, (HEIGHT - LOAD_HEIGHT) / 2); // 设置窗口大小 this.setSize(LOAD_WIDTH, LOAD_HEIGHT); // 设置窗口显示 this.setVisible(true); } public static void main(String[] args) { Demo t = new Demo(); new Thread(t).start(); } @Override public void run() { for (int i = 0; i 100; i++) { try { Thread.sleep(100); } catch (InterruptedException e) { e.printStackTrace(); } progressbar.setValue(i); } JOptionPane.showMessageDialog(this, "加载完成"); this.dispose(); } } 效果图：

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java 做进度条进度数据获取

实现这个功能比较简单，用到的类有两个：ProgressMonitorInputStream（主要是整个类）和 ProgressMonitor ，在javax.swing中整个文件的大小，和当前已经读取文件的大小，获得整个文件大小的方法

代码如下:

ProgressMonitorInputStream monitor;

/**

* @param 表示此进度条要依附在哪个组件上

* @param 显示在此进度条上的消息

* @param 需要监控的输入流

monitor = new ProgressMonitorInputStream(null, "Loading ",new FileInputStream("filename path"));

int all = monitor.available();//整个文件的大小

int in = monitor.read(data);//每次读取文件的大小

例如：你每次读一行str=in.readLine();则data=str.instr.getBytes()+1;这里+1，主要是为了获得换行符的字节数，否则，最后获得的进步无法达到100%

代码如下:

int readed=0;//表示已经读取的文件

reader+=in;//累加读取文件大小

计算进度：

代码如下:

float process = (float) readed / all * 100;// 算出百分比

窗口显示：

代码如下:

progressMonitor.setNote("archived " + process + " %");// 显示在进度条上

java多文件上传显示进度条

使用 apache fileupload ,spring MVC jquery1.6x , bootstrap 实现一个带进度条的多文件上传，由于fileupload 的局限，暂不能实现每个上传文件都显示进度条，只能实现一个总的进度条，效果如图：

1、jsp 页面

!DOCTYPE html

%@ page contentType="text/html;charset=UTF-8"%

%@ taglib prefix="c" uri="" %

html xmlns=""

head

meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /

script src="../js/jquery-1.6.4.js" type="text/javascript"/script

link rel="stylesheet" type="text/css" href="../css/bootstrap.css"/

/head

body

form id='fForm' class="form-actions form-horizontal" action="../upload.html"

encType="multipart/form-data" target="uploadf" method="post"

div class="control-group"

label class="control-label"上传文件:/label

div class="controls"

input type="file" name="file" style="width:550"

/div

div class="controls"

input type="file" name="file" style="width:550"

/div

div class="controls"

input type="file" name="file" style="width:550"

/div

label class="control-label"上传进度:/label

div class="controls"

div class="progress progress-success progress-striped" style="width:50%"

div id = 'proBar' class="bar" style="width: 0%"/div

/div

div class="control-group"

div class="controls"

button type="button" id="subbut" class="btn"submit/button

/div

/form

iframe name="uploadf" style="display:none"/iframe

/body

/html

script

$(document).ready(function(){

$('#subbut').bind('click',

function(){

$('#fForm').submit();

var eventFun = function(){

$.ajax({

type: 'GET',

url: '../process.json',

data: {},

dataType: 'json',

success : function(data){

$('#proBar').css('width',data.rate+''+'%');

$('#proBar').empty();

$('#proBar').append(data.show);

if(data.rate == 100){

window.clearInterval(intId);

}

}});};

var intId = window.setInterval(eventFun,500);

});

/script

2、java 代码

package com.controller;

import java.util.List;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import javax.servlet.http.HttpSession;

import org.apache.commons.fileupload.FileItemFactory;

import org.apache.commons.fileupload.ProgressListener;

import org.apache.commons.fileupload.disk.DiskFileItemFactory;

import org.apache.commons.fileupload.servlet.ServletFileUpload;

import org.apache.log4j.Logger;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

import org.springframework.web.bind.annotation.ResponseBody;

import org.springframework.web.servlet.ModelAndView;

@Controller

public class FileUploadController {

Logger log = Logger.getLogger(FileUploadController.class);

/**

* upload 上传文件

* @param request

* @param response

* @return

* @throws Exception

@RequestMapping(value = "/upload.html", method = RequestMethod.POST)

public ModelAndView upload(HttpServletRequest request,

HttpServletResponse response) throws Exception {

final HttpSession hs = request.getSession();

ModelAndView mv = new ModelAndView();

boolean isMultipart = ServletFileUpload.isMultipartContent(request);

if(!isMultipart){

return mv;

}

// Create a factory for disk-based file items

FileItemFactory factory = new DiskFileItemFactory();

// Create a new file upload handler

ServletFileUpload upload = new ServletFileUpload(factory);

upload.setProgressListener(new ProgressListener(){

public void update(long pBytesRead, long pContentLength, int pItems) {

ProcessInfo pri = new ProcessInfo();

pri.itemNum = pItems;

pri.readSize = pBytesRead;

pri.totalSize = pContentLength;

pri.show = pBytesRead+"/"+pContentLength+" byte";

pri.rate = Math.round(new Float(pBytesRead) / new Float(pContentLength)*100);

hs.setAttribute("proInfo", pri);

}

});

List items = upload.parseRequest(request);

// Parse the request

// Process the uploaded items

// Iterator iter = items.iterator();

// while (iter.hasNext()) {

// FileItem item = (FileItem) iter.next();

// if (item.isFormField()) {

// String name = item.getFieldName();

// String value = item.getString();

// System.out.println("this is common feild!"+name+"="+value);

// } else {

// System.out.println("this is file feild!");

// String fieldName = item.getFieldName();

// String fileName = item.getName();

// String contentType = item.getContentType();

// boolean isInMemory = item.isInMemory();

// long sizeInBytes = item.getSize();

// File uploadedFile = new File("c://"+fileName);

// item.write(uploadedFile);

// }

return mv;

}

/**

* process 获取进度

* @param request

* @param response

* @return

* @throws Exception

@RequestMapping(value = "/process.json", method = RequestMethod.GET)

@ResponseBody

public Object process(HttpServletRequest request,

HttpServletResponse response) throws Exception {

return ( ProcessInfo)request.getSession().getAttribute("proInfo");

}

class ProcessInfo{

public long totalSize = 1;

public long readSize = 0;

public String show = "";

public int itemNum = 0;

public int rate = 0;

}

java导入进度条

很简单，因为数据读到集合所用的时间远远不如数据库的存储，因此只要计算插入数据库的进度即可。做法是：在读入数据库的时候根据集合的大小生成一个最大进度为集合长度的进度条，每成功写入数据库一条，进度条 +1。

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java进度条代码大全进度条代码怎么写

Java中如何实现进度条效果

java 做进度条进度数据获取

java多文件上传显示进度条

java导入进度条

其他资讯

java进度条代码大全 进度条代码怎么写

Java中如何实现进度条效果

java 做进度条 进度数据获取

java多文件上传显示进度条

java导入进度条

其他资讯

java进度条代码大全进度条代码怎么写

java 做进度条进度数据获取