新的浏览器窗口，包含Java applet生成的信息
[英]New browser window with information generated by Java applet
问题描述
I have a Java applet. 
我有一个Java小程序。
After user inputs data into the Java applet controls he presses button in Java applet and Java applet performs some calculating and result is a table (for simplicity table can be considered as String[][] ). 在用户将数据输入Java applet控件后，他按下Java applet中的按钮，Java applet执行一些计算，结果是一个表（为简单表，可以认为是String[][] ）。
I want to show new browser window and output this table in it as html <table> . 我想显示新的浏览器窗口并将其输出为html <table> 。 How can this be done? 如何才能做到这一点？ Preferred way is to use javascript if needed, but not involving some server side handling. 首选方法是在需要时使用javascript，但不涉及某些服务器端处理。
2 个解决方案
解决方案1
3 已采纳 2009-11-22 23:04:05
Well, JavaScript will have to be used to open the window and populate the HTML - this is something the applet simply has no access to. 好吧，JavaScript必须用于打开窗口并填充HTML - 这是applet根本无法访问的内容。
Luckily, JavaScript can easily call any public methods your Java applet provides. 幸运的是，JavaScript可以轻松调用Java applet提供的任何公共方法。 Unfortunately, Java cannot return a String[][] to JavaScript, but it CAN return a String. 不幸的是，Java无法将String [] []返回给JavaScript，但它可以返回一个String。
So what you can do is have your Java applet return a JSON serialization of your String[][] array. 所以你可以做的是让你的Java applet返回String [] []数组的JSON序列化。 JavaScript can then convert that JSON to a JavaScript array using the JSON.parse function (available on most modern browsers, but there are also libaries available at json.org ) 然后，JavaScript可以使用JSON.parse函数将该JSON转换为JavaScript数组（在大多数现代浏览器中都可用，但json.org上也提供了库 ）
So here's an example of what I am talking about (that works with at least Java 5 and Chrome): 所以这里是我所谈论的一个例子（至少与Java 5和Chrome一起使用）：
The Applet Code 小程序代码
import java.applet.*;
public class Test extends Applet {
String data[][];
public void init() {
data = new String[5][2];
data[0] = new String[] { "Peter", "Griffin"};
data[1] = new String[] { "Glen", "Quagmire"};
data[2] = new String[] { "Joe", "Something"};
data[3] = new String[] { "Cleveland", "Brown"};
data[4] = new String[] { "Buzz", "Killington"};
}
public String getData() {
return toJSON(data);
}
/* Quick and dirty, you may want to look
* online for a 'complete' converter
*
* This returns [["Peter", "Griffin"], ["Glen", "Quagmire"], ... etc
*/
protected String toJSON(String data[][]) {
int x, y;
String s = "[";
for (y = 0;y < data.length;y += 1) {
s += "[";
for (x = 0;x < data[y].length;x += 1) {
s += "\""+data[y][x].replaceAll("\"","\\\"")+"\"";
if (x < data[y].length-1) {
s += ", ";
}
}
s += "]";
if (y < data.length-1) {
s += ", ";
}
}
s += "]";
return s;
}
}
The JavaScript Code JavaScript代码
<html>
<body>
<p><applet id="applet" code="Test"></applet></p>
<input id="button" type="button" value="Click me"/>
<script type="text/javascript">
(function () {
var button = document.getElementById("button"), applet = document.getElementById("applet");
button.onclick = function () {
var html = [], newWindow, data = JSON.parse(applet.getData()), j;
html.push("<table><tr><th>First Name</th><th>Last Name</th></tr>");
for (j = 0;j < data.length;j += 1) {
html.push("<tr><td>"+data[j][0]+"</td><td>"+data[j][1]+"</td></tr>");
}
html.push("</table>");
newWindow = window.open();
newWindow.document.firstChild.innerHTML = html.join("");
};
}());
</script>
Let me know if you need further clarification! 如果您需要进一步澄清，请告诉我们！
解决方案2
1 2009-11-22 22:40:01
Preferred way is to use javascript if needed, but not involving some server side handling.
If you really must not have any server side interaction, it'll have to be a jQuery hide/show situation. 如果你真的不能有任何服务器端的交互，它必须是一个jQuery隐藏/显示情况。
If you can bear some server side work, do it with an applet collaborating with servlet. 如果您可以承担一些服务器端工作，请使用与servlet协作的applet。 The applet won't do the calculation; 小程序不会进行计算; the servlet will. servlet会。 After it's complete, the servlet adds the result to the output page and redirects the output stream to it. 完成后，servlet将结果添加到输出页面并将输出流重定向到它。
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