Response 异步返回各种格式数据：json xml text Protobuf

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import java.io.IOException;import java.io.OutputStream;import javax.servlet.http.HttpServletResponse;/** * 异步返回各种格式数据：json xml text Protobuf *  * @author: gyn * @date: 2017年12月8日 */public class ResponseUtils {    private ResponseUtils() {    }    // 发送内容 "application/json;charset=UTF-8"    public static void render(HttpServletResponse response, String contentType, String text) {        response.setContentType(contentType);        try {            response.getWriter().write(text);        } catch (IOException e) {            e.printStackTrace();        }    }    // 发送的是JSON    public static void renderJSON(HttpServletResponse response, String text) {        render(response, "application/json;charset=UTF-8", text);    }    // 发送xml    public static void renderXml(HttpServletResponse response, String text) {        render(response, "application/xml;charset=UTF-8", text);    }    // 发送text    public static void renderText(HttpServletResponse response, String text) {        render(response, "application/plain;charset=UTF-8", text);    }    // 发送Protobuf    public static void renderProtobuf(HttpServletResponse response, byte[] by) {        OutputStream outputStream = null;        try {            response.setContentType("application/x-protobuf");            outputStream = response.getOutputStream();            outputStream.write(by);            outputStream.flush();        } catch (Exception e) {            // TODO: handle exception            System.out.println("renderProtobuf发送异常" + e.getMessage());        } finally {            if (outputStream != null) {                try {                    outputStream.close();                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                    System.out.println("outputStream.close()异常" + e.getMessage());                }            }        }    }}
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