java 发布流文件和读取流文件
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File file = new File("E:\\assets\\picture\\1-1.png");
InputStream a = new FileInputStream(file);
byte[] bbb = ?new byte[a.available()];
a.read(bbb);
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URL url = new URL(url);
HttpURLConnection httpurl = (HttpURLConnection) url.openConnection();
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httpurl.setDoOutput(true);
OutputStream os = httpurl.getOutputStream();
os.write(bbb);
os.flush();
os.close();
int code = httpurl.getResponseCode();?
System.out.println(code);
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//读取json流文件
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URL url = new URL(url);//url资源地址
HttpURLConnection httpURL = (HttpURLConnection) url.openConnection();
InputStream is = httpURL.getInputStream();
if(httpURL.getResponseCode()!=200){
//exception
}
byte[] b = new byte[1];
String str = "";
while(is.read(b)!=-1){
str += new String(b,"utf-8");
}
//第二种
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URL url = new URL(url);
InputStream is = url.openStream();
byte[] b = new byte[1];
String str = "";
while(is.read(b)!=-1){
str += new String(b,"utf-8");
}
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//转json集合
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JSONArray jsonArray=new JSONArray();
jsonArray=jsonArray.fromObject(str);
list=(List<User>)JSONArray.toList(jsonArray,User.class);
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//获取单个对象
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System.out.println(str);
JSONObject json = JSONObject.fromObject(str);
System.out.println("a"+json.get("userName"));
System.out.println("b"+JSONObject.fromObject(json.get("list")));//获取list字段的集合，变成对象
List list=JSONArray.fromObject(json.get("list"));//变成集合
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