java 在图片上写文字
功能：直接在一张已有的图片上写字，可指定文字颜色。?
?????????? 如果背景图片是空，生成一张白图片，根据文本信息，来决定图片的长度和宽度。?
package pictures;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import java.util.List;
import javax.imageio.ImageIO;
public class Draw {
?? ? private static Font mFont = new Font("宋体",Font.PLAIN,20);?
?? ?public static void main(String[] args) {
?? ??? ?File f1 = new File("C:\\Documents and Settings\\xugang\\桌面\\t.txt");
?? ??? ?File f2 = new File("C:\\Documents and Settings\\xugang\\桌面\\testPictrue.JPEG");
?? ??? ?File f3 = new File("C:\\Documents and Settings\\xugang\\桌面\\1.jpg");
?? ??? ?draw2(f1,f2,f3,true);
?? ??? ?
?? ?}
?? ?
?? ?//直接在一张已有的图片上写字，可指定文字颜色。如果背景图片参数为空或者""，则写张白图
?? ?public static void draw2( File content , File outPictrue , File background , boolean b ){
?? ??? ? FileReader f = null ;
?? ??? ??? ?try {
?? ??? ??? ??? ?f = new FileReader(content);
?? ??? ??? ?} catch (FileNotFoundException e1) {
?? ??? ??? ??? ?e1.printStackTrace();
?? ??? ??? ?}
?? ??? ??? ??? ?BufferedReader br = new BufferedReader(f);
?? ??? ??? ??? ?String line = "";
?? ??? ??? ??? ?int lineNum = 0 ;?? ?//一共有多少行
?? ??? ??? ??? ?List<String> list = new ArrayList<String>();
?? ??? ??? ??? ?try {
?? ??? ??? ??? ??? ?while( (line = br.readLine()) != null){
?? ??? ??? ??? ??? ??? ?System.out.println(line);
?? ??? ??? ??? ??? ??? ?list.add(line);
?? ??? ??? ??? ??? ??? ?++lineNum;
?? ??? ??? ??? ??? ?}
?? ??? ??? ??? ?} catch (IOException e1) {
?? ??? ??? ??? ??? ?e1.printStackTrace();
?? ??? ??? ??? ?}
?? ??? ??? ??? ?
?? ??? ??? ??? ?int[] iArray = new int[list.size()];
?? ??? ??? ??? ?int length = list.size();
?? ??? ??? ??? ?for(int k = 0 ; k < length ; k++){
?? ??? ??? ??? ??? ?iArray[k] = format1(list.get(k));
?? ??? ??? ??? ?}
?? ??? ??? ??? ?Arrays.sort(iArray);
?? ??? ??? ??? ?int lineLength = iArray[length-1];
?? ??? ??? ??? ?System.out.println("文本中最长的一行的长度是："+lineLength);
?? ??? ??? ??? ?System.out.println("一共的行数是："+lineNum);
?? ??? ??? ??? ?BufferedImage image = null;
?? ??? ??? ??? ?if( background.equals("") || background == null){
?? ??? ??? ??? ??? ?double h = 256/16;
?? ??? ??? ??? ??? ?double w = 85/10;
?? ??? ??? ??? ??? ?int width=(int) (w*lineLength)+ 40 , height=(int) (h*lineNum);
?? ??? ??? ??? ??? ?image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
?? ??? ??? ??? ?}else{
?? ??? ??? ??? ??? ?try {
?? ??? ??? ??? ??? ??? ?image = ImageIO.read(background);
?? ??? ??? ??? ??? ?} catch (IOException e1) {
?? ??? ??? ??? ??? ??? ?e1.printStackTrace();
?? ??? ??? ??? ??? ?}
?? ??? ??? ??? ?}
?? ??? ??? ??? ?Graphics g = image.getGraphics();
//?? ??? ??? ??? ?g.setColor(getRandColor(200,250));
//?? ??? ???????? g.fillRect(1, 1, width-1, height-1);
?? ??? ??? ??? ?if( b == false){
?? ??? ???????? g.setColor(new Color(102,102,102));? //设字体为黑色,否则就是白色
?? ??? ??? ??? ?}
//?? ??? ???????? g.drawRect(0, 0, width-1, height-1);
?? ??? ???????? g.setFont(mFont);
?? ??? ??? ??? ?int k = 0;
?? ??? ??? ??? ?Iterator<String> it = list.iterator();
?? ??? ??? ??? ?while(it.hasNext()){
?? ??? ??? ??? ??? ?g.drawString(it.next(), 30, 15 + 20*k);
?? ??? ??? ??? ??? ?++k;
?? ??? ??? ??? ?}
?? ??? ??? ??? ?try {
?? ??? ??? ??? ??? ?ImageIO.write(image, "JPEG", outPictrue);
?? ??? ??? ??? ?} catch (IOException e) {
?? ??? ??? ??? ??? ?e.printStackTrace();
?? ??? ??? ??? ?}
?? ?}
????
?? ?//返回占位符的长度。
?? ? public static int format1( String s){
?? ??? ??? ?int length = 0 ;
?? ??? ??? ?for(int t = 0; t < s.length() ; t++){
?? ??? ??? ??? ?if( s.charAt(t)> 255){
?? ??? ??? ??? ??? ?length = length + 2;
?? ??? ??? ??? ?}else{
?? ??? ??? ??? ??? ?length = length + 1 ;
?? ??? ??? ??? ?}
?? ??? ??? ?}
?? ??? ??? ?System.out.println(length);
?? ??? ??? ?return length;
?? ? }
?? ? //生成一张白图片，根据文本信息，来决定图片的长度和宽度。
?? ? //缺点：字体不同，字体样式不同，都会影响整个图片。
?? ? public static void draw1(){
?? ??? ? FileReader f = null ;
?? ??? ?try {
?? ??? ??? ?f = new FileReader("C:\\Documents and Settings\\xugang\\桌面\\t.txt");
?? ??? ?} catch (FileNotFoundException e1) {
?? ??? ??? ?e1.printStackTrace();
?? ??? ?}
?? ??? ??? ?BufferedReader br = new BufferedReader(f);
?? ??? ??? ?String line = "";
?? ??? ??? ?int lineNum = 0 ;?? ?//一共有多少行
?? ??? ??? ?List<String> list = new ArrayList<String>();
?? ??? ??? ?try {
?? ??? ??? ??? ?while( (line = br.readLine()) != null){
?? ??? ??? ??? ??? ?System.out.println(line);
?? ??? ??? ??? ??? ?list.add(line);
?? ??? ??? ??? ??? ?++lineNum;
?? ??? ??? ??? ?}
?? ??? ??? ?} catch (IOException e1) {
?? ??? ??? ??? ?e1.printStackTrace();
?? ??? ??? ?}
?? ??? ??? ?
?? ??? ??? ?int[] iArray = new int[list.size()];
?? ??? ??? ?int length = list.size();
?? ??? ??? ?for(int k = 0 ; k < length ; k++){
?? ??? ??? ??? ?iArray[k] = format1(list.get(k));
?? ??? ??? ?}
?? ??? ??? ?Arrays.sort(iArray);
?? ??? ??? ?int lineLength = iArray[length-1];
?? ??? ??? ?System.out.println("文本中最长的一行的长度是："+lineLength);
?? ??? ??? ?System.out.println("一共的行数是："+lineNum);
?? ??? ??? ?
?? ??? ??? ?double h = 256/16;
?? ??? ??? ?double w = 85/10;
?? ??? ??? ?int width=(int) (w*lineLength)+ 40 , height=(int) (h*lineNum);
?? ??? ??? ?BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
?? ??? ??? ?Graphics g = image.getGraphics();
//?? ??? ??? ?g.setColor(getRandColor(200,250));
?? ???????? g.fillRect(1, 1, width-1, height-1);
?? ???????? g.setColor(new Color(102,102,102));
?? ???????? g.drawRect(0, 0, width-1, height-1);
?? ???????? g.setFont(mFont);
?? ??? ??? ?int k = 0;
?? ??? ??? ?Iterator<String> it = list.iterator();
?? ??? ??? ?while(it.hasNext()){
?? ??? ??? ??? ?g.drawString(it.next(), 30, 15+15*k);
?? ??? ??? ??? ?++k;
?? ??? ??? ?}
?? ??? ??? ?try {
?? ??? ??? ??? ?ImageIO.write(image, "JPEG", new File("C:\\Documents and Settings\\xugang\\桌面\\testPictrue.JPEG"));
?? ??? ??? ?} catch (IOException e) {
?? ??? ??? ??? ?e.printStackTrace();
?? ??? ??? ?}
?? ? }
}
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