java怎么生成图片

① 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();

}

}
}

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。

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

③ 请问下java中导出图片怎么做

package com.xolt;
import java.io.FileOutputStream;
import java.io.File;
import java.io.ByteArrayOutputStream;
import java.io.IOException;

import java.awt.image.BufferedImage;
import javax.imageio.*;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;;

public class TestPOI {

public static void main(String[] args) {
FileOutputStream fileOut = null;
BufferedImage bufferImg =null;
BufferedImage bufferImg1 = null;
try{

//先把读进来的图片放到一个ByteArrayOutputStream中，以便产生ByteArray
ByteArrayOutputStream byteArrayOut = new ByteArrayOutputStream();
ByteArrayOutputStream byteArrayOut1 = new ByteArrayOutputStream();
bufferImg = ImageIO.read(new File("C:/Documents and Settings/dingqi/Desktop/clip_image002.jpg"));
bufferImg1 = ImageIO.read(new File("C:/Documents and Settings/dingqi/Desktop/clip_image002.jpg"));
ImageIO.write(bufferImg,"jpg",byteArrayOut);
ImageIO.write(bufferImg1,"jpg",byteArrayOut1);

//创建一个工作薄
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet1 = wb.createSheet("poi picT");
//HSSFRow row = sheet1.createRow(2);
HSSFPatriarch patriarch = sheet1.createDrawingPatriarch();
HSSFClientAnchor anchor = new HSSFClientAnchor(0,0,512,255,(short) 1,1,(short)10,20);
HSSFClientAnchor anchor1 = new HSSFClientAnchor(0,0,512,255,(short) 2,30,(short)10,60);
anchor1.setAnchorType(2);
//插入图片
patriarch.createPicture(anchor , wb.addPicture(byteArrayOut.toByteArray(),HSSFWorkbook.PICTURE_TYPE_JPEG));
patriarch.createPicture(anchor1 , wb.addPicture(byteArrayOut1.toByteArray(),HSSFWorkbook.PICTURE_TYPE_JPEG));

fileOut = new FileOutputStream("c:/workbook.xls");
//写入excel文件
wb.write(fileOut);
fileOut.close();

}catch(IOException io){
io.printStackTrace();
System.out.println("io erorr : "+ io.getMessage());
} finally
{
if (fileOut != null)
{

try {
fileOut.close();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}

poi中图片到到excel的方法 你需要准备poi包 试试看看