REST图片流

写了个Spring rest 风格的 图片加载。

package cn.tang.demo.controller.image;import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;&＃64;Controller
&＃64;RequestMapping(value &＃61; "/image/")
public class ImageCacheController {// for restful http://localhost:8888/rest/image/load?imageName&＃61;a.jpg&＃64;RequestMapping(value &＃61; "/load", method &＃61; RequestMethod.GET)public void imageLoad(&＃64;RequestParam(value &＃61; "imageName", required &＃61; true) String imageName, HttpServletRequest request, HttpServletResponse response)throws IOException {File f &＃61; new File("c://"&＃43;imageName);if (!f.exists()) {return;}FileInputStream fis &＃61; new FileInputStream(f);byte[] buffer &＃61; new byte[1024];int len &＃61;0;try {response.setHeader("Content-Type", "image/jpg;charset&＃61;UTF-8");ServletOutputStream outputStream &＃61; response.getOutputStream();while ((len&＃61;fis.read(buffer)) > 0) {outputStream.write(buffer, 0, len);}outputStream.flush();} finally {fis.close();}}// for restful http://localhost:8888/rest/image/a.jpg&＃64;RequestMapping(value &＃61; "/{name:\\S*\\.?\\S&＃43;}", method &＃61; RequestMethod.GET)public void helloMan(&＃64;PathVariable String imageName, HttpServletRequest request, HttpServletResponse response)throws IOException {File f &＃61; new File("c://"&＃43;imageName);if (!f.exists()) {return;}FileInputStream fis &＃61; new FileInputStream(f);byte[] buffer &＃61; new byte[1024];int len &＃61;0;try {response.setHeader("Content-Type", "image/jpg;charset&＃61;UTF-8");ServletOutputStream outputStream &＃61; response.getOutputStream();while ((len&＃61;fis.read(buffer)) > 0) {outputStream.write(buffer, 0, len);}outputStream.flush();} finally {fis.close();}}}


   这个是最基本的图片获取方式&＃xff0c;我们可以把图片放入缓存中&＃xff0c;然后通过读缓存而不是读文件来获取图片。