java实现从txt文件读入信息输出二维码

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以下源码，注意不要放在同一个文件夹里，选择中文编码格式“utf-8”

注意字符串的读入问题，表示新手做的第一个小玩意很兴奋，虽然抄了一些源码，但扫出来了还是很爽的

package com.kt.twobarimage;

import com.swetake.util.Qrcode;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.DataInputStream;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

import java.io.DataInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;

public class CreateTwoBarImage {

public void creatTxm(String param) throws Exception {

Qrcode qrcode = new Qrcode();

qrcode.setQrcodeErrorCorrect(‘M‘);

qrcode.setQrcodeEncodeMode(‘B‘);

qrcode.setQrcodeVersion(7);

byte[] bstr = param.getBytes("UTF-8");

BufferedImage bi = new BufferedImage(139, 139,BufferedImage.TYPE_INT_RGB);

Graphics2D g = bi.createGraphics();

g.setBackground(Color.WHITE); //背景颜色

g.clearRect(0, 0, 139, 139);

g.setColor(Color.BLACK); //条码颜色

if (bstr.length > 0 && bstr.length < 123) {

boolean[][] b = qrcode.calQrcode(bstr);

for (int i = 0; i < b.length; i++) {

for (int j = 0; j < b.length; j++) {

if (b[j][i]) {

g.fillRect(j * 3 + 2, i * 3 + 2, 3, 3);

}

}

}

}

g.dispose();

bi.flush();

String FilePath = "d:/images/"+param.substring(0,5)+".jpg";

File f = new File(FilePath);

ImageIO.write(bi, "jpg", f);

}

public static void main(String args[]){

DataInputStream din = null;
try{
InputStreamReader is = new InputStreamReader(new FileInputStream("E:/input/test.txt"),"utf-8");
String str1 = "";
String str2 = "";

int i = -1;
while((i=is.read())!=-1){
char m = (char)i;
str2 = String.valueOf(m);
str1 = str1+str2;
}

try {

new CreateTwoBarImage().creatTxm(str1);

} catch (Exception e) {

e.printStackTrace();
}

is.close();
}catch (Exception e){
e.printStackTrace();
}

//最终行为---关闭流~
finally{
try{
if (din != null){
din.close();
}
}catch(IOException e){
e.printStackTrace();
}
}

}
}

java实现从txt文件读入信息输出二维码

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原文地址：http://www.cnblogs.com/guoyang134340/p/4681574.html