{"id":768,"date":"2023-03-11T11:32:48","date_gmt":"2023-06-09T04:22:04","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/java-%e4%b8%ad%e7%9a%84%e4%ba%ab%e5%85%83%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f\/"},"modified":"2025-08-03T07:02:43","modified_gmt":"2025-08-02T23:02:43","slug":"java-%e4%b8%ad%e7%9a%84%e4%ba%ab%e5%85%83%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java-%e4%b8%ad%e7%9a%84%e4%ba%ab%e5%85%83%e8%ae%be%e8%ae%a1%e6%a8%a1%e5%bc%8f\/","title":{"rendered":"\u6df1\u5165\u7406\u89e3Java\u4eab\u5143\u8bbe\u8ba1\u6a21\u5f0f\uff1a\u539f\u7406\u3001\u5b9e\u73b0\u4e0e\u6027\u80fd\u4f18\u5316\u5e94\u7528"},"content":{"rendered":"<p>\u8fd9\u662f\u6587\u7ae0\u300aJava \u4e2d\u7684\u4eab\u5143\u8bbe\u8ba1\u6a21\u5f0f\u300b\u7684\u7b2c1\u90e8\u5206\uff08\u51711\u90e8\u5206\uff09\u3002<\/p>\n<p>\u5185\u5bb9\u7247\u6bb5: \u4eca\u5929\u6211\u4eec\u5c06\u7814\u7a76\u4eab\u5143\u8bbe\u8ba1\u6a21\u5f0f\u3002<\/p>\n<h2>\u4eab\u5143\u8bbe\u8ba1\u6a21\u5f0f<\/h2>\n<p>\u6839\u636e\u300a\u8bbe\u8ba1\u6a21\u5f0f\u300b\u6240\u8ff0\uff0c\u4eab\u5143\u8bbe\u8ba1\u6a21\u5f0f\u7684\u610f\u56fe\u662f\uff1a<\/p>\n<blockquote><p>\u4f7f\u7528\u5171\u4eab\u6765\u9ad8\u6548\u5730\u652f\u6301\u5927\u91cf\u7684\u7ec6\u7c92\u5ea6\u5bf9\u8c61\u3002<\/p><\/blockquote>\n<p>\u4eab\u5143\u8bbe\u8ba1\u6a21\u5f0f\u662f\u4e00\u79cd\u7ed3\u6784\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5c31\u50cf\u95e8\u9762\u6a21\u5f0f\u3001\u9002\u914d\u5668\u6a21\u5f0f\u548c\u88c5\u9970\u5668\u6a21\u5f0f\u4e00\u6837\u3002\u4eab\u5143\u8bbe\u8ba1\u6a21\u5f0f\u7528\u4e8e\u5728\u9700\u8981\u521b\u5efa\u5927\u91cf\u7c7b\u7684\u5bf9\u8c61\u65f6\u4f7f\u7528\u3002\u7531\u4e8e\u6bcf\u4e2a\u5bf9\u8c61\u6d88\u8017\u7684\u5185\u5b58\u7a7a\u95f4\u5bf9\u4e8e\u4f4e\u5185\u5b58\u8bbe\u5907\uff08\u5982\u79fb\u52a8\u8bbe\u5907\u6216\u5d4c\u5165\u5f0f\u7cfb\u7edf\uff09\u53ef\u80fd\u5f88\u5173\u952e\uff0c\u56e0\u6b64\u53ef\u4ee5\u5e94\u7528\u4eab\u5143\u8bbe\u8ba1\u6a21\u5f0f\u6765\u901a\u8fc7\u5171\u4eab\u5bf9\u8c61\u51cf\u5c11\u5185\u5b58\u8d1f\u8f7d\u3002\u5728\u5e94\u7528\u4eab\u5143\u8bbe\u8ba1\u6a21\u5f0f\u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u8003\u8651\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n<ul class=\"post-ul\">\n<li>\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u521b\u5efa\u7684\u5bf9\u8c61\u6570\u91cf\u5e94\u8be5\u975e\u5e38\u5e9e\u5927\u3002<\/li>\n<li>\u5bf9\u8c61\u521b\u5efa\u5bf9\u5185\u5b58\u6d88\u8017\u8f83\u5927\uff0c\u540c\u65f6\u4e5f\u53ef\u80fd\u8017\u65f6\u3002<\/li>\n<li>\u5bf9\u8c61\u5c5e\u6027\u53ef\u4ee5\u5206\u4e3a\u5185\u5728\u5c5e\u6027\u548c\u5916\u5728\u5c5e\u6027\uff0c\u5bf9\u8c61\u7684\u5916\u5728\u5c5e\u6027\u5e94\u8be5\u7531\u5ba2\u6237\u7aef\u7a0b\u5e8f\u5b9a\u4e49\u3002<\/li>\n<\/ul>\n<p>\u5e94\u7528\u4eab\u5143\u6a21\u5f0f\u65f6\uff0c\u6211\u4eec\u9700\u8981\u5c06\u5bf9\u8c61\u5c5e\u6027\u5206\u4e3a\u5185\u5728\u5c5e\u6027\u548c\u5916\u5728\u5c5e\u6027\u3002\u5185\u5728\u5c5e\u6027\u4f7f\u5f97\u5bf9\u8c61\u72ec\u4e00\u65e0\u4e8c\uff0c\u800c\u5916\u5728\u5c5e\u6027\u7531\u5ba2\u6237\u7aef\u4ee3\u7801\u8bbe\u7f6e\uff0c\u5e76\u7528\u4e8e\u6267\u884c\u4e0d\u540c\u7684\u64cd\u4f5c\u3002\u4f8b\u5982\uff0c\u4e00\u4e2a\u5706\u5f62\u5bf9\u8c61\u53ef\u4ee5\u5177\u6709\u5916\u5728\u5c5e\u6027\uff0c\u5982\u989c\u8272\u548c\u5bbd\u5ea6\u3002\u4e3a\u4e86\u5e94\u7528\u4eab\u5143\u6a21\u5f0f\uff0c\u6211\u4eec\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u4eab\u5143\u5de5\u5382\uff0c\u5b83\u8fd4\u56de\u5171\u4eab\u5bf9\u8c61\u3002\u4ee5\u6211\u4eec\u7684\u4f8b\u5b50\u6765\u8bf4\uff0c\u6211\u4eec\u9700\u8981\u521b\u5efa\u4e00\u4e2a\u5305\u542b\u7ebf\u6761\u548c\u692d\u5706\u7684\u7ed8\u56fe\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u5c06\u62e5\u6709\u4e00\u4e2aShape\u63a5\u53e3\u4ee5\u53ca\u5b83\u7684\u5177\u4f53\u5b9e\u73b0Line\u548cOval\u3002Oval\u7c7b\u5c06\u5177\u6709\u5185\u5728\u5c5e\u6027\uff0c\u7528\u4e8e\u786e\u5b9a\u662f\u5426\u4f7f\u7528\u7ed9\u5b9a\u7684\u989c\u8272\u6765\u586b\u5145\u692d\u5706\uff0c\u800cLine\u7c7b\u5c06\u4e0d\u5177\u6709\u4efb\u4f55\u5185\u5728\u5c5e\u6027\u3002<\/p>\n<h3>\u4eab\u5143\u8bbe\u8ba1\u6a21\u5f0f\u63a5\u53e3\u548c\u5177\u4f53\u7c7b<\/h3>\n<p>\u5f62\u72b6.java<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.design.flyweight;\r\n\r\nimport java.awt.Color;\r\nimport java.awt.Graphics;\r\n\r\npublic interface Shape {\r\n\r\n\tpublic void draw(Graphics g, int x, int y, int width, int height,\r\n\t\t\tColor color);\r\n}\r\n<\/code><\/pre>\n<p>\u7ebf.java<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.design.flyweight;\r\n\r\nimport java.awt.Color;\r\nimport java.awt.Graphics;\r\n\r\npublic class Line implements Shape {\r\n\r\n\tpublic Line(){\r\n\t\tSystem.out.println(\"\u521b\u5efa\u7ebf\u6761\u5bf9\u8c61\");\r\n\t\t\/\/\u6dfb\u52a0\u65f6\u95f4\u5ef6\u8fdf\r\n\t\ttry {\r\n\t\t\tThread.sleep(2000);\r\n\t\t} catch (InterruptedException e) {\r\n\t\t\te.printStackTrace();\r\n\t\t}\r\n\t}\r\n\t@Override\r\n\tpublic void draw(Graphics line, int x1, int y1, int x2, int y2,\r\n\t\t\tColor color) {\r\n\t\tline.setColor(color);\r\n\t\tline.drawLine(x1, y1, x2, y2);\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u692d\u5706.java<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.design.flyweight;\r\n\r\nimport java.awt.Color;\r\nimport java.awt.Graphics;\r\n\r\npublic class Oval implements Shape {\r\n\t\r\n\t\/\/\u5185\u5728\u5c5e\u6027\r\n\tprivate boolean fill;\r\n\t\r\n\tpublic Oval(boolean f){\r\n\t\tthis.fill=f;\r\n\t\tSystem.out.println(\"\u521b\u5efa\u692d\u5706\u5bf9\u8c61\uff0c\u586b\u5145\u5c5e\u6027\u4e3a=\"+f);\r\n\t\t\/\/\u6dfb\u52a0\u65f6\u95f4\u5ef6\u8fdf\r\n\t\ttry {\r\n\t\t\tThread.sleep(2000);\r\n\t\t} catch (InterruptedException e) {\r\n\t\t\te.printStackTrace();\r\n\t\t}\r\n\t}\r\n\t@Override\r\n\tpublic void draw(Graphics circle, int x, int y, int width, int height,\r\n\t\t\tColor color) {\r\n\t\tcircle.setColor(color);\r\n\t\tcircle.drawOval(x, y, width, height);\r\n\t\tif(fill){\r\n\t\t\tcircle.fillOval(x, y, width, height);\r\n\t\t}\r\n\t}\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u8bf7\u6ce8\u610f\uff0c\u6211\u6545\u610f\u5728\u521b\u5efa\u5177\u4f53\u7c7b\u7684\u5bf9\u8c61\u65f6\u5f15\u5165\u4e86\u5ef6\u8fdf\uff0c\u4ee5\u6b64\u6765\u8bf4\u660e\u4eab\u5143\u6a21\u5f0f\u53ef\u7528\u4e8e\u5b9e\u4f8b\u5316\u65f6\u95f4\u8f83\u957f\u7684\u5bf9\u8c61\u3002<\/p>\n<h3>\u4eab\u5143\u5de5\u5382<\/h3>\n<p>\u5ba2\u6237\u7aef\u7a0b\u5e8f\u5c06\u4f7f\u7528\u4eab\u5143\u5de5\u5382\u6765\u5b9e\u4f8b\u5316\u5bf9\u8c61\uff0c\u56e0\u6b64\u6211\u4eec\u9700\u8981\u5728\u5de5\u5382\u4e2d\u4fdd\u6301\u4e00\u4e2a\u5bf9\u8c61\u7684\u6620\u5c04\uff0c\u8be5\u6620\u5c04\u4e0d\u5e94\u8be5\u88ab\u5ba2\u6237\u7aef\u5e94\u7528\u7a0b\u5e8f\u8bbf\u95ee\u3002\u6bcf\u5f53\u5ba2\u6237\u7aef\u7a0b\u5e8f\u8c03\u7528\u83b7\u53d6\u5bf9\u8c61\u5b9e\u4f8b\u7684\u65b9\u6cd5\u65f6\uff0c\u5e94\u8be5\u4eceHashMap\u4e2d\u8fd4\u56de\u5bf9\u8c61\uff0c\u5982\u679c\u627e\u4e0d\u5230\u5219\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\u5e76\u653e\u5165\u6620\u5c04\u4e2d\uff0c\u7136\u540e\u8fd4\u56de\u3002\u6211\u4eec\u9700\u8981\u786e\u4fdd\u5728\u521b\u5efa\u5bf9\u8c61\u65f6\u8003\u8651\u6240\u6709\u5185\u5728\u5c5e\u6027\u3002\u6211\u4eec\u7684\u4eab\u5143\u5de5\u5382\u7c7b\u7684\u4ee3\u7801\u5982\u4e0b\uff1aShapeFactory.java<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.design.flyweight;\r\n\r\nimport java.util.HashMap;\r\n\r\npublic class ShapeFactory {\r\n\r\n\tprivate static final HashMap&lt;ShapeType,Shape&gt; shapes = new HashMap&lt;ShapeType,Shape&gt;();\r\n\r\n\tpublic static Shape getShape(ShapeType type) {\r\n\t\tShape shapeImpl = shapes.get(type);\r\n\r\n\t\tif (shapeImpl == null) {\r\n\t\t\tif (type.equals(ShapeType.OVAL_FILL)) {\r\n\t\t\t\tshapeImpl = new Oval(true);\r\n\t\t\t} else if (type.equals(ShapeType.OVAL_NOFILL)) {\r\n\t\t\t\tshapeImpl = new Oval(false);\r\n\t\t\t} else if (type.equals(ShapeType.LINE)) {\r\n\t\t\t\tshapeImpl = new Line();\r\n\t\t\t}\r\n\t\t\tshapes.put(type, shapeImpl);\r\n\t\t}\r\n\t\treturn shapeImpl;\r\n\t}\r\n\t\r\n\tpublic static enum ShapeType{\r\n\t\tOVAL_FILL,OVAL_NOFILL,LINE;\r\n\t}\r\n}\r\n<\/code><\/pre>\n<p>\u8bf7\u6ce8\u610f\u5728getShape\u65b9\u6cd5\u4e2d\uff0c\u4f7f\u7528Java\u679a\u4e3e\u7c7b\u578b\u6765\u786e\u4fdd\u7c7b\u578b\u5b89\u5168\uff0c\u4f7f\u7528Java\u7ec4\u5408\uff08shapes map\uff09\u548c\u5de5\u5382\u6a21\u5f0f\u3002<\/p>\n<h3>\u4eab\u5143\u8bbe\u8ba1\u6a21\u5f0f\u5ba2\u6237\u7aef\u793a\u4f8b<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u4f7f\u7528\u4eab\u5143\u6a21\u5f0f\u5b9e\u73b0\u7684\u793a\u4f8b\u7a0b\u5e8f\uff0cDrawingClient.java\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.design.flyweight;\r\n\r\nimport java.awt.BorderLayout;\r\nimport java.awt.Color;\r\nimport java.awt.Container;\r\nimport java.awt.Graphics;\r\nimport java.awt.event.ActionEvent;\r\nimport java.awt.event.ActionListener;\r\n\r\nimport javax.swing.JButton;\r\nimport javax.swing.JFrame;\r\nimport javax.swing.JPanel;\r\n\r\nimport com.Olivia.design.flyweight.ShapeFactory.ShapeType;\r\n\r\npublic class DrawingClient extends JFrame{\r\n\r\n\tprivate static final long serialVersionUID = -1350200437285282550L;\r\n\tprivate final int WIDTH;\r\n\tprivate final int HEIGHT;\r\n\r\n\tprivate static final ShapeType shapes[] = { ShapeType.LINE, ShapeType.OVAL_FILL,ShapeType.OVAL_NOFILL };\r\n\tprivate static final Color colors[] = { Color.RED, Color.GREEN, Color.YELLOW };\r\n\t\r\n\tpublic DrawingClient(int width, int height){\r\n\t\tthis.WIDTH=width;\r\n\t\tthis.HEIGHT=height;\r\n\t\tContainer contentPane = getContentPane();\r\n\r\n\t\tJButton startButton = new JButton(\"\u7ed8\u5236\");\r\n\t\tfinal JPanel panel = new JPanel();\r\n\r\n\t\tcontentPane.add(panel, BorderLayout.CENTER);\r\n\t\tcontentPane.add(startButton, BorderLayout.SOUTH);\r\n\t\tsetSize(WIDTH, HEIGHT);\r\n\t\tsetDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);\r\n\t\tsetVisible(true);\r\n\r\n\t\tstartButton.addActionListener(new ActionListener() {\r\n\t\t\tpublic void actionPerformed(ActionEvent event) {\r\n\t\t\t\tGraphics g = panel.getGraphics();\r\n\t\t\t\tfor (int i = 0; i &lt; 20; ++i) {\r\n\t\t\t\t\tShape shape = ShapeFactory.getShape(getRandomShape());\r\n\t\t\t\t\tshape.draw(g, getRandomX(), getRandomY(), getRandomWidth(),\r\n\t\t\t\t\t\t\tgetRandomHeight(), getRandomColor());\r\n\t\t\t\t}\r\n\t\t\t}\r\n\t\t});\r\n\t}\r\n\t\r\n\tprivate ShapeType getRandomShape() {\r\n\t\treturn shapes[(int) (Math.random() * shapes.length)];\r\n\t}\r\n\r\n\tprivate int getRandomX() {\r\n\t\treturn (int) (Math.random() * WIDTH);\r\n\t}\r\n\r\n\tprivate int getRandomY() {\r\n\t\treturn (int) (Math.random() * HEIGHT);\r\n\t}\r\n\r\n\tprivate int getRandomWidth() {\r\n\t\treturn (int) (Math.random() * (WIDTH \/ 10));\r\n\t}\r\n\r\n\tprivate int getRandomHeight() {\r\n\t\treturn (int) (Math.random() * (HEIGHT \/ 10));\r\n\t}\r\n\r\n\tprivate Color getRandomColor() {\r\n\t\treturn colors[(int) (Math.random() * colors.length)];\r\n\t}\r\n\r\n\tpublic static void main(String[] args) {\r\n\t\tDrawingClient drawing = new DrawingClient(500,600);\r\n\t}\r\n}\r\n<\/code><\/pre>\n<p>\u6211\u4f7f\u7528\u968f\u673a\u6570\u751f\u6210\u6765\u751f\u6210\u4e0d\u540c\u7c7b\u578b\u7684\u5f62\u72b6\u5728\u6211\u4eec\u7684\u6846\u67b6\u4e0a\u3002\u5982\u679c\u4f60\u8fd0\u884c\u4e0a\u9762\u7684\u5ba2\u6237\u7aef\u7a0b\u5e8f\uff0c\u4f60\u4f1a\u6ce8\u610f\u5230\u521b\u5efa\u7b2c\u4e00\u4e2a\u7ebf\u5bf9\u8c61\u548c\u586b\u5145\u4e3atrue\u548cfalse\u7684\u692d\u5706\u5bf9\u8c61\u7684\u5ef6\u8fdf\u3002\u4e4b\u540e\u7a0b\u5e8f\u6267\u884c\u975e\u5e38\u5feb\uff0c\u56e0\u4e3a\u5b83\u4f7f\u7528\u4e86\u5171\u4eab\u7684\u5bf9\u8c61\u3002\u70b9\u51fb&#8221;\u7ed8\u5236&#8221;\u6309\u94ae\u591a\u6b21\u540e\uff0c\u6846\u67b6\u7684\u6837\u5b50\u5982\u4e0b\u56fe\u6240\u793a\u3002\u4f60\u4f1a\u5728\u547d\u4ee4\u884c\u4e2d\u770b\u5230\u4ee5\u4e0b\u8f93\u51fa\uff0c\u786e\u8ba4\u5bf9\u8c61\u662f\u5171\u4eab\u7684\u3002<\/p>\n<pre 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