Graphics2渲染图像导出的3种方式

图像导出的3种方式"/>

Graphics2渲染图像导出的3种方式

写出来主要是希望遇到大神指点迷津，这自己边试边学得出来得经验来得太慢了，而且累。有没有更实用的资料或者书籍介绍java画图中，JFrame,JPanel,JComponent,Graphics,Graphices2D,Graphices3D,Shape,这些区别与联系的实用的资料书，本人将不胜感激！！！

其实主要是想用JComponent这个组件，里面有些画图方法比较方便。但是返回的对象又不知道怎么做处理导出，所以就尝试，实验出了这3种导出方法。
1.通过导出jfream窗口图片（这种方式是jfream窗口和图片保存都会做显示，jfream的黑框背景会显示，求大神指点）

package com.dasenlin.test;import java.awt.Container;
import java.awt.EventQueue;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;import javax.imageio.ImageIO;
import javax.swing.JFrame;import com.dasenlin.util.MyFrame;public class TestJframePic {public static final String DEST4 = "C:/Users/Toshiba/Desktop/testjframe.png";/*** @param args*/public static void main(String[] args) {/** 在 AWT 的事件队列线程中创建窗口和组件, 确保线程安全,* 即 组件创建、绘制、事件响应 需要处于同一线程。*/EventQueue.invokeLater(new Runnable() {@Overridepublic void run() {// 创建窗口对象MyFrame frame = new MyFrame("折线",250,300);// 显示窗口(必须显示，否则就是黑框，还有就是这个有点问题的就是，jfream的黑框背景会显示，求大神指点)frame.setVisible(true);savePic(frame);}});}public static void savePic(JFrame jf){  //得到窗口内容面板  Container content=jf.getContentPane();  //创建缓冲图片对象  BufferedImage img=new BufferedImage( jf.getWidth(),jf.getHeight(),BufferedImage.TYPE_INT_RGB);  //得到图形对象  Graphics2D g2d = img.createGraphics();  //将窗口内容面板输出到图形对象中  content.printAll(g2d);  //保存为图片  try{ImageIO.write(img, "jpg", new File( DEST4));}catch (IOException e){e.printStackTrace();}//释放图形对象  g2d.dispose();  }  
}

2.通过导出Jpanel图片(这种方式可以不用考虑jfream的黑框背景，甚至不显示jfream也能导出)

package com.dasenlin.util;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;import javax.imageio.ImageIO;
import javax.swing.JFrame;
import javax.swing.WindowConstants;/*** * @author Toshiba**/
public class MyFrame extends JFrame {/*** */private static final long serialVersionUID = 1L;public static final String DEST4 = "C:/Users/Toshiba/Desktop/testjframe.png";public MyFrame(String title,Integer windowW,Integer windowH) {super();initFrame(title,windowW,windowH);}private void initFrame(String title,Integer windowW,Integer windowH) {// 设置 窗口标题 和 窗口大小setTitle(title);setSize(windowW, windowH);// 设置窗口关闭按钮的默认操作(点击关闭时退出进程)setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);// 把窗口位置设置到屏幕的中心setLocationRelativeTo(null);// 设置窗口的内容面板MyPanel panel = new MyPanel(this);setContentPane(panel);//自己的JPanel// 必须要有大小panel.setSize(windowW, windowH);BufferedImage image = new BufferedImage(windowW, windowH, BufferedImage.TYPE_INT_RGB);Graphics2D g2 = image.createGraphics();panel.paint(g2);try {ImageIO.write(image, "jpg", new File(DEST4));} catch (IOException e) {e.printStackTrace();}}
}

直接graphics2D中用graphics的画图方法导出

public static void savePic(JFrame jf){  
BufferedImage images= DepParserSvgUtil.depParserSvg(dataList);try{ImageIO.write(images, "PNG", new File( DEST4));}catch (IOException e){e.printStackTrace();}}      public static BufferedImage depParserSvg(List<Map<String,Object>> yicunList){
BufferedImage bi = new BufferedImage(DEFAULT_W, DEFAULT_H, BufferedImage.TYPE_INT_ARGB);Graphics2D g2d = bi.createGraphics();//设置画笔(设置背景)g2d.setPaint(Color.WHITE);g2d.fillRect(5, 5, DEFAULT_W, DEFAULT_H);//draw stringg2d.setPaint(Color.BLACK);Font f = new Font("宋体", Font.PLAIN, ZH_WORD_WIDTH);g2d.setFont(f); FontRenderContext context = g2d.getFontRenderContext();for(int w=0; w<yicunList.size();w++){String word = yicunList.get(w).get("word").toString();String mark = yicunList.get(w).get("id").toString()+"|"+yicunList.get(w).get("post").toString();String lable = yicunList.get(w).get("dep_type").toString();float wordx = (float) WORDS_TRANSLATE.get(w).get("x");float wordy = (float) WORDS_TRANSLATE.get(w).get("y");g2d.drawString(word, wordx, wordy);Rectangle2D bounds = f.getStringBounds(word, context);g2d.draw(bounds); double wordW=bounds.getWidth();//文本宽度  double wordH=bounds.getHeight();//文本高度  double ascent=-bounds.getY();//文本上坡度 LineMetrics metrics=f.getLineMetrics(word, context); float descent=metrics.getDescent();//文本下坡度  float leading=metrics.getLeading();//文本行距 float markx = wordx;float marky = (float) (wordy+descent+leading+wordH);g2d.drawString(mark, markx, marky);bounds = f.getStringBounds(mark, context);g2d.draw(bounds);double markW=bounds.getWidth();//文本宽度  //画边框矩形double borderW = (double) Math.max(wordW, markW);Rectangle2D msgRect=new Rectangle2D.Double(wordx,wordy-ascent,borderW,wordH*2+descent*2+leading*2);//包围文本的矩形  g2d.draw(msgRect); //画关系线int edge1x =  EDGE_PATH.get(w).get(0).get("x");int edge1y =  EDGE_PATH.get(w).get(0).get("y");int edge2x =  EDGE_PATH.get(w).get(1).get("x");int edge2y =  EDGE_PATH.get(w).get(1).get("y");int edge3x =  EDGE_PATH.get(w).get(2).get("x");int edge3y =  EDGE_PATH.get(w).get(2).get("y");int edge4x =  EDGE_PATH.get(w).get(3).get("x");int edge4y =  EDGE_PATH.get(w).get(3).get("y");g2d.drawLine(edge1x, edge1y, edge2x, edge2y);g2d.drawLine(edge2x, edge2y, edge3x, edge3y);g2d.drawLine(edge3x, edge3y, edge4x, edge4y);//画箭头int rectangle1x =edge4x-5;int rectangle1y =edge4y;int rectangle2x =edge4x+5;int rectangle2y =edge4y;int rectangle3x =edge4x;int rectangle3y =edge4y+5;g2d.drawLine(rectangle1x, rectangle1y, rectangle2x, rectangle2y);g2d.drawLine(rectangle2x, rectangle2y, rectangle3x, rectangle3y);g2d.drawLine(rectangle3x, rectangle3y, rectangle1x, rectangle1y);//画lableint lablex = EDGE_LABLE_INFO.get(w).get("x");int labley = EDGE_LABLE_INFO.get(w).get("y");int lableH = EDGE_LABLE_INFO.get(w).get("height");int lableW = EDGE_LABLE_INFO.get(w).get("width");f = new Font("SansSerif",Font.BOLD,ONE_LABLE_HEIGHT);context = g2d.getFontRenderContext();bounds = f.getStringBounds(lable,context);g2d.setFont(f);g2d.clearRect((int)(lablex*1.05 - bounds.getCenterX()), (int)(labley - (lableH/2) - bounds.getCenterY()), lableW, lableH);g2d.drawString(lable, (float) (lablex*1.05 - bounds.getCenterX()), (float) (labley - (lableH/2) - bounds.getCenterY()));}/****************Graphics2DDrawEnd*****************/g2d.dispose();//销毁资源return bi;
}

综合上述，实用继承Jpanel并输出图片的方式比较好，可以兼顾jfream的前端输出，可以做后台输出。还可以实用组件的一些好用方法。代码结构比较清晰。
以下是Jpanel中画图的代码

package com.dasenlin.util;import java.awt.BasicStroke;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Paint;
import java.awt.RenderingHints;
import java.awt.Toolkit;import javax.swing.JPanel;public class MyPanel extends JPanel {/*** */private static final long serialVersionUID = 1L;private MyFrame frame;public MyPanel(MyFrame frame) {this.frame = frame;}/*** 绘制面板的内容: 创建 JPanel 后会调用一次该方法绘制内容,* 之后如果数据改变需要重新绘制, 可调用 updateUI() 方法触发* 系统再次调用该方法绘制更新 JPanel 的内容。*/@Overrideprotected void paintComponent(Graphics g) {super.paintComponent(g);// 重新调用 Graphics 的绘制方法绘制时将自动擦除旧的内容/* 自行打开下面注释查看各绘制效果 */// 1. 线段 / 折线drawLine(g);// 2. 矩形 / 多边形// drawRect(g);// 3. 圆弧 / 扇形// drawArc(g);// 4. 椭圆// drawOval(g);// 5. 图片// drawImage(g);// 6. 文本// drawString(g);}/*** 1. 线段 / 折线*/private void drawLine(Graphics g) {frame.setTitle("1. 线段 / 折线");// 创建 Graphics 的副本, 需要改变 Graphics 的参数,// 这里必须使用副本, 避免影响到 Graphics 原有的设置Graphics2D g2d = (Graphics2D) g.create();// 抗锯齿g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);// 设置画笔颜色g2d.setColor(Color.RED);}

写出来主要是希望遇到大神指点迷津，这自己边试边学得出来得经验来得太慢了，而且累。有没有更实用的资料或者书籍介绍java画图中，JFrame,JPanel,JComponent,Graphics,Graphices2d,Graphices3D,Shape,这些区别与联系的资料书，本人将不胜感激！！！