本文目录一览：
- 1、JAVA怎样将PPTX文件转换成图片
- 2、java怎么生成带用户微信头像的图片，并把这张图片发送给用户。
- 3、java在生成图片的时候，让文字竖排展示，如何实现？
- 4、java中怎么将word文档怎么生成图片
- 5、java如何生成颜色相间的条纹图片
JAVA怎样将PPTX文件转换成图片
关键代码就是： rtruns[l].setFontName("宋体");
import java.awt.Dimension;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics2D;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import org.apache.poi.hslf.model.TextRun;
import org.apache.poi.hslf.record.Slide;
import org.apache.poi.hslf.usermodel.RichTextRun;
import org.apache.poi.hslf.usermodel.SlideShow;
public class PPTtoImage {
public static void main(String[] args) {
// 读入PPT文件
File file = new File("F:/20110618.ppt");
doPPTtoImage(file);
}
public static boolean doPPTtoImage(File file) {
boolean isppt = checkFile(file);
if (!isppt) {
System.out.println("The image you specify don't exit!");
return false;
}
try {
FileInputStream is = new FileInputStream(file);
SlideShow ppt = new SlideShow(is);
is.close();
Dimension pgsize = ppt.getPageSize();
org.apache.poi.hslf.model.Slide[] slide = ppt.getSlides();
for (int i = 0; i slide.length; i++) {
System.out.print("第" + i + "页。");
TextRun[] truns = slide[i].getTextRuns();
for (int k = 0; k truns.length; k++) {
RichTextRun[] rtruns = truns[k].getRichTextRuns();
for (int l = 0; l rtruns.length; l++) {
int index = rtruns[l].getFontIndex();
String name = rtruns[l].getFontName();
rtruns[l].setFontIndex(1);
rtruns[l].setFontName("宋体");
System.out.println(rtruns[l].getText());
}
}
BufferedImage img = new BufferedImage(pgsize.width,
pgsize.height, BufferedImage.TYPE_INT_RGB);
Graphics2D graphics = img.createGraphics();
graphics.setPaint(Color.white);
graphics.fill(new Rectangle2D.Float(0, 0, pgsize.width,
pgsize.height));
slide[i].draw(graphics);
// 这里设置图片的存放路径和图片的格式(jpeg,png,bmp等等),注意生成文件路径
FileOutputStream out = new FileOutputStream("F:/test/pict_"
+ (i + 1) + ".jpeg");
javax.imageio.ImageIO.write(img, "jpeg", out);
out.close();
}
System.out.println("success!!");
return true;
} catch (FileNotFoundException e) {
System.out.println(e);
// System.out.println("Can't find the image!");
} catch (IOException e) {
}
return false;
}
// function 检查文件是否为PPT
public static boolean checkFile(File file) {
boolean isppt = false;
String filename = file.getName();
String suffixname = null;
if (filename != null filename.indexOf(".") != -1) {
suffixname = filename.substring(filename.indexOf("."));
if (suffixname.equals(".ppt")) {
isppt = true;
}
return isppt;
} else {
return isppt;
}
}
}
java怎么生成带用户微信头像的图片，并把这张图片发送给用户。
1、下载生成二维码所需要的jar包qrcode.jar；2、直接上生成二维码的java代码 //需要导入的包import java.awt.Color;import java.awt.Graphics2D;import java.awt.Image;import java.awt.image.BufferedImage;import java.io.File;import javax.imageio.ImageIO;import com.swetake.util.Qrcode; /** * 生成二维码(QRCode)图片 * @param content 二维码图片的内容 * @param imgPath 生成二维码图片完整的路径 * @param ccbpath 二维码图片中间的logo路径 */ public static int createQRCode(String content, String imgPath,String ccbPath) { try { Qrcode qrcodeHandler = new Qrcode(); qrcodeHandler.setQrcodeErrorCorrect('M'); qrcodeHandler.setQrcodeEncodeMode('B'); qrcodeHandler.setQrcodeVersion(7); // System.out.println(content); byte[] contentBytes = content.getBytes("gb2312"); //构造一个BufferedImage对象 设置宽、高 BufferedImage bufImg = new BufferedImage(140, 140, BufferedImage.TYPE_INT_RGB); Graphics2D gs = bufImg.createGraphics(); gs.setBackground(Color.WHITE); gs.clearRect(0, 0, 140, 140); // 设定图像颜色 BLACK gs.setColor(Color.BLACK); // 设置偏移量 不设置可能导致解析出错 int pixoff = 2; // 输出内容 二维码 if (contentBytes.length 0 contentBytes.length 120) { boolean[][] codeOut = qrcodeHandler.calQrcode(contentBytes); for (int i = 0; i codeOut.length; i++) { for (int j = 0; j codeOut.length; j++) { if (codeOut[j][i]) { gs.fillRect(j * 3 + pixoff, i * 3 + pixoff, 3, 3); } } } } else { System.err.println("QRCode content bytes length = " + contentBytes.length + " not in [ 0,120 ]. "); return -1; } Image img = ImageIO.read(new File(ccbPath));//实例化一个Image对象。 gs.drawImage(img, 55, 55, 30, 30, null); gs.dispose(); bufImg.flush(); // 生成二维码QRCode图片 File imgFile = new File(imgPath); ImageIO.write(bufImg, "png", imgFile); }catch (Exception e){ e.printStackTrace(); return -100; } return 0; }
来自网友 孤独青鸟的博客
java在生成图片的时候，让文字竖排展示，如何实现？
package honest.imageio;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
/**
* 图片操作类
*
* @author
*
*/
public class ImageUtil {
private BufferedImage image;
private int width; // 图片宽度
private int height; // 图片高度
public ImageUtil(int width, int height) {
this.width = width;
this.height = height;
image = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
}
/**
* 创建一个含有指定颜色字符串的图片
*
* @param message
* 字符串
* @param fontSize
* 字体大小
* @param color
* 字体颜色
* @return 图片
*/
public BufferedImage drawString(String message, int fontSize, Color color) {
Graphics g = image.getGraphics();
g.setColor(color);
Font f = new Font("宋体", Font.BOLD, fontSize);
g.setFont(f);
int len = message.length();
g.drawString(message, (width - fontSize * len) / 2,
(height + (int) (fontSize / 1.5)) / 2);
g.dispose();
return image;
}
/**
* 缩放图片
*
* @param scaleW
* 水平缩放比例
* @param scaleY
* 垂直缩放比例
* @return
*/
public BufferedImage scale(double scaleW, double scaleH) {
width = (int) (width * scaleW);
height = (int) (height * scaleH);
BufferedImage newImage = new BufferedImage(width, height,
image.getType());
Graphics g = newImage.getGraphics();
g.drawImage(image, 0, 0, width, height, null);
g.dispose();
image = newImage;
return image;
}
/**
* 旋转90度旋转
*
* @return 对应图片
*/
public BufferedImage rotate() {
BufferedImage dest = new BufferedImage(height, width,
BufferedImage.TYPE_INT_ARGB);
for (int i = 0; i width; i++)
for (int j = 0; j height; j++) {
dest.setRGB(height - j - 1, i, image.getRGB(i, j));
}
image = dest;
return image;
}
/**
* 合并两个图像
*
* @param anotherImage
* 另一张图片
* @return 合并后的图片，如果两张图片尺寸不一致，则返回null
*/
public BufferedImage mergeImage(BufferedImage anotherImage) {
int w = anotherImage.getWidth();
int h = anotherImage.getHeight();
if (w != width || h != height) {
return null;
}
for (int i = 0; i w; i++) {
for (int j = 0; j h; j++) {
int rgb1 = image.getRGB(i, j);
int rgb2 = anotherImage.getRGB(i, j);
Color color1 = new Color(rgb1);
Color color2 = new Color(rgb2);
// 如果该位置两张图片均没有字体经过，则跳过
// 如果跳过，则最后将会是黑色背景
if (color1.getRed() + color1.getGreen() + color1.getBlue()
+ color2.getRed() + color2.getGreen()
+ color2.getBlue() == 0) {
continue;
}
Color color = new Color(
(color1.getRed() + color2.getRed()) / 2,
(color1.getGreen() + color2.getGreen()) / 2,
(color1.getBlue() + color2.getBlue()) / 2);
image.setRGB(i, j, color.getRGB());
}
}
return image;
}
/**
* 保存图片int rgb1 = image.getRGB(i, j); int rgb2 = anotherImage.getRGB(i, j);
* rgb2 = rgb1 rgb2; image.setRGB(height - i, j, rgb2);
*
* @param filePath
* 图片路径
*/
public void save(String filePath) {
try {
ImageIO.write(image, "png", new File(filePath));
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 得到对应的图片
*
* @return
*/
public BufferedImage getImage() {
return image;
}
}
java中怎么将word文档怎么生成图片
public class CreateWordDemo
{
public void createDocContext(String file)
throws DocumentException,IOException {
//
设置纸张大小
Document document = new
Document(PageSize.A4);
//
建立一个书写器(Writer)与document对象关联，通过书写器(Writer)可以将文档写入到磁盘中
RtfWriter2.getInstance(document, new
FileOutputStream(file));
document.open();
//
设置中文字体
BaseFont bfChinese =
BaseFont.createFont("STSongStd-Light", "UniGB-UCS2-H",
BaseFont.NOT_EMBEDDED);
//
标题字体风格
Font titleFont = new Font(bfChinese, 12,
Font.BOLD);
//
正文字体风格
Font contextFont = new Font(bfChinese, 10,
Font.NORMAL);
Paragraph title = new
Paragraph("标题");
//
设置标题格式对齐方式
title.setAlignment(Element.ALIGN_CENTER);
title.setFont(titleFont);
document.add(title);
String contextString =
"iText是一个能够快速产生PDF文件的java类库。"
+ " \n"//
换行
+
"iText的java类对于那些要产生包含文本，"
+ "表格，图形的只读文档是很有用的。它的类库尤其与java
Servlet有很好的给合。"
+
"使用iText与PDF能够使你正确的控制Servlet的输出。";
Paragraph context = new
Paragraph(contextString);
//
正文格式左对齐
context.setAlignment(Element.ALIGN_LEFT);
context.setFont(contextFont);
//
离上一段落（标题）空的行数
context.setSpacingBefore(5);
//
设置第一行空的列数
context.setFirstLineIndent(20);
document.add(context);
//
利用类FontFactory结合Font和Color可以设置各种各样字体样式
Paragraph underline = new Paragraph("下划线的实现",
FontFactory.getFont(
FontFactory.HELVETICA_BOLDOBLIQUE, 18,
Font.UNDERLINE, new Color(0, 0,
255)));
document.add(underline);
// 设置 Table
表格
Table aTable = new
Table(3);
int width[] = { 25, 25, 50
};
aTable.setWidths(width);//
设置每列所占比例
aTable.setWidth(90); // 占页面宽度
90%
aTable.setAlignment(Element.ALIGN_CENTER);//
居中显示
aTable.setAlignment(Element.ALIGN_MIDDLE);//
纵向居中显示
aTable.setAutoFillEmptyCells(true); //
自动填满
aTable.setBorderWidth(1); //
边框宽度
aTable.setBorderColor(new Color(0, 125, 255)); //
边框颜色
aTable.setPadding(2);//
衬距，看效果就知道什么意思了
aTable.setSpacing(3);//
即单元格之间的间距
aTable.setBorder(2);//
边框
//
设置表头
Cell haderCell = new
Cell("表格表头");
haderCell.setHeader(true);
haderCell.setColspan(3);
aTable.addCell(haderCell);
aTable.endHeaders();
Font fontChinese = new Font(bfChinese, 12, Font.NORMAL,
Color.GREEN);
Cell cell = new Cell(new Phrase("这是一个测试的 3*3 Table 数据",
fontChinese));
cell.setVerticalAlignment(Element.ALIGN_TOP);
cell.setBorderColor(new Color(255, 0,
0));
cell.setRowspan(2);
aTable.addCell(cell);
aTable.addCell(new
Cell("#1"));
aTable.addCell(new
Cell("#2"));
aTable.addCell(new
Cell("#3"));
aTable.addCell(new
Cell("#4"));
Cell cell3 = new Cell(new Phrase("一行三列数据",
fontChinese));
cell3.setColspan(3);
cell3.setVerticalAlignment(Element.ALIGN_CENTER);
aTable.addCell(cell3);
document.add(aTable);
document.add(new
Paragraph("\n"));
//
添加图片 Image.getInstance即可以放路径又可以放二进制字节流
Image img =
Image.getInstance("d:\\img01800.jpg");
img.setAbsolutePosition(0,
0);
img.setAlignment(Image.RIGHT);//
设置图片显示位置
img.scaleAbsolute(60, 60);//
直接设定显示尺寸
//
img.scalePercent(50);//表示显示的大小为原尺寸的50%
// img.scalePercent(25,
12);//图像高宽的显示比例
//
img.setRotation(30);//图像旋转一定角度
document.add(img);
document.close();
}
public static void main(String[] args)
{
CreateWordDemo word = new
CreateWordDemo();
String file =
"d:/demo1.doc";
try
{
word.createDocContext(file);
} catch (DocumentException e)
{
e.printStackTrace();
} catch (IOException e)
{
e.printStackTrace();
}
}
}
java如何生成颜色相间的条纹图片
这是简单的初步实现，你可以借鉴一下哈
package v01;
import javax.swing.*;
import java.awt.*;
public class ColorP extends JFrame {
public ColorP(){
this.add(new NewPanel());
}
public static void main(String[] args) {
ColorP frame = new ColorP();
frame.setTitle("Content");
frame.setSize(300, 150);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
class NewPanel extends JPanel{//扩展JPanel
public NewPanel(){
}
protected void paintComponent(Graphics g){//运用画笔Graphics绘制
super.paintComponent(g);//添加画笔
int[] x = new int[4];
int[] y = new int[4];
for(int i = 0; i 10; i++){
x[0] = i * 40 ;y[0] = 0;
x[1] = x[0] + 40;y[1] = 0;
x[2] = 0;y[2] = (i+1) * 40;
x[3] = 0;y[3] = y[2] - 40 ;
if(i % 2 == 0)
g.setColor(Color.black);
else
g.setColor(Color.yellow);
g.fillPolygon(x, y, x.length);
}
}
}
}
