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

不念不忘少年蓝@ 2021-09-26 09:20 327阅读 0赞

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());
                    }
                }
            }
    
        }
    
    }