Java批量写入文件和下载图片的示例代码

[{
  "avatar": "http://static.withme.cn/585****",
  "blocks": [{
    "content": "今天天气不错******",
    "type": "text"
  }, {
    "content": "http://static.withme.cn/84ac***",
    "type": "pic"
  }, {
    "content": "http://static.withme.cn/5af2c***",
    "type": "pic"
  }, {
    "content": "http://static.withme.cn/9a4e****",
    "type": "pic"
  }, {
    "content": "http://static.withme.cn/9ffdb***",
    "type": "pic"
  }, {
    "content": "http://static.withme.cn/da5e7db***",
    "type": "pic"
  }, {
    "content": "http://static.withme.cn/e6ccf3764***",
    "type": "pic"
  }, {
    "content": "http://static.withme.cn/73ca***",
    "type": "pic"
  }, {
    "content": "http://static.wi***",
    "type": "pic"
  }, {
    "content": "http://static.withme.cn/4cf7dde****",
    "type": "pic"
  }],
  "dateStr": "2018-09-03",
  "timeStr": "18:59:41"
},{...},...]

 public static void main(String[] args) {
    CloseableHttpClient client = null;
    JSONArray jsonArray = JSONArray.parseArray(
      "[{
        "avatar": "http://static.withme.cn/585****",
        "blocks": [{
          "content": "今天天气不错******",
          "type": "text"
        }, {
          "content": "http://static.withme.cn/84ac***",
          "type": "pic"
        }, {
          "content": "http://static.withme.cn/5af2c***",
          "type": "pic"
        }, {
          "content": "http://static.withme.cn/9a4e****",
          "type": "pic"
        }, {
          "content": "http://static.withme.cn/9ffdb***",
          "type": "pic"
        }, {
          "content": "http://static.withme.cn/da5e7db***",
          "type": "pic"
        }, {
          "content": "http://static.withme.cn/e6ccf3764***",
          "type": "pic"
        }, {
          "content": "http://static.withme.cn/73ca***",
          "type": "pic"
        }, {
          "content": "http://static.wi***",
          "type": "pic"
        }, {
          "content": "http://static.withme.cn/4cf7dde****",
          "type": "pic"
        }],
        "dateStr": "2018-09-03",
        "timeStr": "18:59:41"
      },{...},{...},...]");
 
    try {
      for (int m = 0; m < jsonArray.size(); m++) {
        JSONObject jsonPas = jsonArray.getJSONObject(m);
        JSONArray array = JSONArray.parseArray(jsonPas.get("blocks").toString());
        String time = jsonPas.get("dateStr").toString();
        for (int j = 0; j < array.size(); j++) {
          JSONObject jsPas = array.getJSONObject(j); // 遍历 jsonarray 数组，把每一个对象转成 json 对象
          if (jsPas.get("type").equals("text")) {
            FileWriter fileWriter = null;
            try {
              String filePath = "f:/13/" + time;
              File dir = new File(filePath);
              // 检查放置文件的文件夹路径是否存在，不存在则创建
              if (!dir.exists()) {
                dir.mkdirs();// mkdirs创建多级目录
              }
              File checkFile = new File(filePath + "/text" + time + "-" + j + ".txt");
              // 检查目标文件是否存在，不存在则创建
              if (!checkFile.exists()) {
                checkFile.createNewFile();// 创建目标文件
              }
              // FileWriter(File file, boolean append)，append为true时为追加模式，false或缺省则为覆盖模式
              fileWriter = new FileWriter(checkFile, true);
              String url = jsPas.get("content").toString();
              // 向目标文件中写入内容
              fileWriter.append(url);
              fileWriter.flush();
              System.out.println("写入成功！！");
            } catch (IOException e) {
              e.printStackTrace();
            } finally {
              try {
                fileWriter.close();
              } catch (IOException e) {
                e.printStackTrace();
              }
            }
          }
          if (jsPas.get("type").equals("pic")) {
            client = HttpClients.createDefault();
            String url = jsPas.get("content").toString();
            String path = "f:/13/" + time;
            // System.out.println(jsPas.get("content"));
            httpGetImg(client, url, path + "/pic" + time + "-" + j + ".jpg");
            System.out.println("ok");
          }
        }
      }
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      if (client != null) {
        try {
          client.close();
        } catch (IOException e) {
          e.printStackTrace();
        }
      }
    }
  }
 
  /**
   * 发送get请求, 下载图片
   * 
   * @param url 路径
   * @return
   */
  public static void httpGetImg(CloseableHttpClient client, String imgUrl, String savePath) {
    // 发送get请求
    HttpGet request = new HttpGet(imgUrl);
    // 设置请求和传输超时时间
    RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(50000).setConnectTimeout(50000).build();
    // 设置请求头
    request.setHeader("User-Agent",
      "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.1 (KHTML, like Gecko) Chrome/21.0.1180.79 Safari/537.1");
    request.setConfig(requestConfig);
    try {
      CloseableHttpResponse response = client.execute(request);
      if (HttpStatus.SC_OK == response.getStatusLine().getStatusCode()) {
        HttpEntity entity = response.getEntity();
        InputStream in = entity.getContent();
        FileUtils.copyInputStreamToFile(in, new File(savePath));
        System.out.println("下载图片成功:" + imgUrl);
      }
    } catch (IOException e) {
      e.printStackTrace();
      throw new RuntimeException(e);
    } finally {
      request.releaseConnection();
    }
  }

 <!-- apache io操作通用jar包 -->
    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>
    
   <!-- httpclient 支持jar -->
  <dependency>
    <groupId>org.apache.httpcomponents</groupId>
      <artifactId>httpclient</artifactId>
     <version>4.3.5</version>
   </dependency>
   <dependency>
     <groupId>org.apache.httpcomponents</groupId>
     <artifactId>httpmime</artifactId>
     <version>4.3.5</version>
   </dependency>