jax-rs浏览器导出zip文件

Love The Way You Lie 2022-10-20 13:54 61阅读 0赞

使用`StreamingOutput`

public StreamingOutput packageAppDsConfigZip(Map<String, Map<String, Object>> dataMap)
                                                                                              throws Exception { 
    
            StreamingOutput fileStream = new StreamingOutput() { 
                @Override
                public void write(OutputStream outputStream) throws IOException,
                                                            WebApplicationException { 
    
                    ZipOutputStream zos = new ZipOutputStream(outputStream);
                    InputStream is;
                    int readLen;
                    byte[] buf = new byte[1024];
    
                    for (Map.Entry<String, Map<String, Object>> dirEntry : dataMap.entrySet()) { 
                        for (Map.Entry fileEntry : dirEntry.getValue().entrySet()) { 
                            ZipEntry cze = new ZipEntry(dirEntry.getKey() + "/" + fileEntry.getKey());
                            zos.putNextEntry(cze);
                            is = new ByteArrayInputStream(fileEntry.getValue().toString().getBytes());
                            while ((readLen = is.read(buf, 0, 1024)) != -1) { 
                                zos.write(buf, 0, readLen);
                            }
                        }
                    }
    
                    zos.close();
                    outputStream.close();
    
                }
            };
            return fileStream;
        }

Controller 添加http响应头  
Content-Disposition: attachment; filename=“xxx.zip”

public Response downloadAppConfig()
                                                                                                        throws IOException { 
            try { 
                StreamingOutput configStream = packageAppDsConfigZip(map);
                return Response.ok(configStream)
                    .header("content-disposition", "attachment; filename=" + xxxx + ".zip").build();
    
            } catch (Exception e) { 
                return Response.serverError().build();
            }
        }
    
    Response.ok(configStream)
                    .header("content-disposition", "attachment; filename=" + xxx + ".zip").build();