package com.wtsrui.utils;
import java.awt.Color;
import sun.misc.BASE64Encoder;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.geom.Ellipse2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.ProtocolException;
import java.net.URL;
import javax.imageio.ImageIO;
import com.wtsrui.dao.BSONObject;
import com.wtsrui.dao.Bmob;
import com.wtsrui.test.TestDemo;
import sun.misc.BASE64Decoder;
public class ToCirclePicture{
public static void main1(String[] args) {
try {
// 是头像地址
// 获取图片的流
法一：
BufferedImage url =
getUrlByBufferedImage("某云端自动生成的图片地址");
法二：获取磁盘上的图片
/* BufferedImage src=*/
// ImageIO.read(new File("c://20.jpg"));
int min;//若是长方形图片则按照边短的去裁剪成圆，如果没有这个就会变成椭圆
if(url.getWidth()>url.getHeight()){
min=url.getHeight();
}else{
min=url.getWidth();
}
// BufferedImage url = (BufferedImage) src;
// 处理图片将其压缩成正方形的小图
BufferedImage convertImage = scaleByPercentage(url,100,100);
// 裁剪成圆形 （传入的图像必须是正方形的 才会 圆形 如果是长方形的比例则会变成椭圆的）
convertImage = convertCircular(url,min);
// 生成的图片位置
String imagePath = "Imag.png";
//File file = new File(imagePath);
ImageIO.write(convertImage, imagePath.substring(imagePath.lastIndexOf(".") + 1), new File(imagePath));
TestDemo.initBmob();
Bmob.uploadFile(imagePath);
System.out.println("ok");
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 缩小Image，此方法返回源图像按给定宽度、高度限制下缩放后的图像
*
* @param inputImage
* @param maxWidth
* ：压缩后宽度
* @param maxHeight
* ：压缩后高度
* @throws java.io.IOException
* return
*/
public static BufferedImage scaleByPercentage(BufferedImage inputImage, int newWidth, int newHeight) throws Exception {
// 获取原始图像透明度类型
int type = inputImage.getColorModel().getTransparency();
int width = inputImage.getWidth();
int height = inputImage.getHeight();
// 开启抗锯齿
RenderingHints renderingHints = new RenderingHints(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
// 使用高质量压缩
renderingHints.put(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
BufferedImage img = new BufferedImage(newWidth, newHeight, type);
Graphics2D graphics2d = img.createGraphics();
// graphics2d.setRenderingHints(renderingHints);
graphics2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
graphics2d.drawImage(inputImage, 0, 0, newWidth, newHeight, 0, 0, width, height, null);
graphics2d.dispose();
return img;
}
/**
* 通过网络获取图片
*
* @param url
* @return
*/
public static BufferedImage getUrlByBufferedImage(String url) {
try {
URL urlObj = new URL(url);
HttpURLConnection conn = (HttpURLConnection) urlObj.openConnection();
// 连接超时
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setConnectTimeout(25000);
// 读取超时 --服务器响应比较慢,增大时间
conn.setReadTimeout(25000);
conn.setRequestMethod("GET");
conn.addRequestProperty("Accept-Language", "zh-cn");
conn.addRequestProperty("Content-type", "image/jpeg");
conn.addRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 2.0.50727)");
conn.connect();
BufferedImage bufImg = ImageIO.read(conn.getInputStream());
conn.disconnect();
return bufImg;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (ProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* 传入的图像必须是正方形的 才会 圆形 如果是长方形的比例则会变成椭圆的
*
* @param url
* 用户头像地址
* @return
* @throws IOException
*/
public static BufferedImage convertCircular(BufferedImage bi1,int min) throws IOException {
// BufferedImage bi1 = ImageIO.read(new File(url));
// 这种是黑色底的
// BufferedImage bi2 = new BufferedImage(bi1.getWidth(), bi1.getHeight(), BufferedImage.TYPE_INT_RGB);
// 透明底的图片
BufferedImage bi2 = new BufferedImage(min, min, BufferedImage.TYPE_4BYTE_ABGR);
Ellipse2D.Double shape = new Ellipse2D.Double(0, 0,min,min);
Graphics2D g2 = bi2.createGraphics();
g2.setClip(shape);
// 使用 setRenderingHint 设置抗锯齿
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
g2.drawImage(bi1, 0, 0, null);
// 设置颜色
g2.setBackground(Color.green);
g2.dispose();
return bi2;
}
public static String getBase64(String str){
byte[] b=null;
String s=null;
try {
b = str.getBytes("utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
if(b!=null){
s=new BASE64Encoder().encode(b);
}
return s;
}
}