最近用使开发的程过中出现了一个小问题，顺便记录一下原因和方法--数据服务器
GET和POST都能实现向服务器中上传数据，
GET向服务器上传数据程工源码下载址地：客户端： 源码下载 服务器端：源码下载
POST向服务器上传数据程工源码下载址地：客户端： 源码下载 服务器端：源码下载
两者的别区如下：
GET上传的数据一般是很小的并且安全性能不高的数据， 而POST上传的数据适用于数据量大，数据类型庞杂，数据安全性能要求高的地方
GET和POST的用使方法一般如下：
1.采取GET方法向服务器传递数据的步调
1.利用Map合集对数据停止取获并停止数据处理
if (params!=null&&!params.isEmpty()) {
for (Map.Entry<String, String> entry:params.entrySet()) {
sb.append(entry.getKey()).append("=");
sb.append(URLEncoder.encode(entry.getValue(),encoding));
sb.append("&");
}
sb.deleteCharAt(sb.length()-1);
}
2.建新一个StringBuilder对象
sb=new StringBuilder()
3.建新一个HttpURLConnection的URL对象，打开接连并传递服务器的path
connection=(HttpURLConnection) new URL(path).openConnection();
4.设置超时和接连的方法
connection.setConnectTimeout(5000);
connection.setRequestMethod("GET");
2.采取POST方法向服务器传递数据的步调
1.利用Map合集对数据停止取获并停止数据处理
if (params!=null&&!params.isEmpty()) {
for (Map.Entry<String, String> entry:params.entrySet()) {
sb.append(entry.getKey()).append("=");
sb.append(URLEncoder.encode(entry.getValue(),encoding));
sb.append("&");
}
sb.deleteCharAt(sb.length()-1);
}
2.建新一个StringBuilder对象，到得POST传给服务器的数据
sb=new StringBuilder()
byte[] data=sb.toString().getBytes();
3.建新一个HttpURLConnection的URL对象，打开接连并传递服务器的path
connection=(HttpURLConnection) new URL(path).openConnection();
4.设置超时和答应对外接连数据
connection.setDoOutput(true);
5.设置接连的setRequestProperty性属
connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
connection.setRequestProperty("Content-Length", data.length+"");
6.到得接连输出流
outputStream =connection.getOutputStream();
7.把到得的数据入写输出流中并刷新
outputStream.write(data);
outputStream.flush();
3.详细实现的程过如下：
1.用使GET方法上传数据
服务器中doGet方法中的码代如下：
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String name =request.getParameter("name");
String age=request.getParameter("age");
System.out.println("--------name:"+name);
System.out.println("--------age:"+age);
}
在客户端实现的码代如下：
public class UserSerivce {
public static boolean save(String getname, String getage) throws Exception {
String path = "http://10.254.1.62/WebForGETMethod/ServletForGetMethod";
Map<String, String> params = new HashMap<String, String>();
params.put("name", getname);
params.put("age", getage);
return sendGETRequest(path, params, "UTF-8");
}
private static boolean sendGETRequest(String path,
Map<String, String> params, String encoding) throws Exception {
StringBuilder sb = new StringBuilder(path);
if (params != null && !params.isEmpty()) {
sb.append("?");
for (Map.Entry<String, String> entry : params.entrySet()) {
sb.append(entry.getKey()).append("=");
sb.append(URLEncoder.encode(entry.getValue(), encoding));
sb.append("&");
}
sb.deleteCharAt(sb.length() - 1);
}
HttpURLConnection connection = (HttpURLConnection) new URL(
sb.toString()).openConnection();
connection.setConnectTimeout(5000);
connection.setRequestMethod("GET");
if (connection.getResponseCode() == 200) {
return true;
}
return false;
}
}
然后呢，就是实在现android客户端的界面
public class GetDataToWebActivity extends Activity {
private EditText name,age;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.getdate);
name=(EditText) findViewById(R.id.name);
age=(EditText) findViewById(R.id.age);
}
public void save(View v) {
String getname=name.getText().toString();
String getage=age.getText().toString();
boolean result=false;
try {
result=UserSerivce.save(getname,getage);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (result) {
Toast.makeText(this, "功成", 1).show();
}else {
Toast.makeText(this, "失败", 1).show();
}
}
}
实现结果如下：
2.用使POST方法上传数据
在服务器实现的码代如下：
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
String name=request.getParameter("name");
String age=request.getParameter("age");
System.out.println("name form post method "+name);
System.out.println("age from post method"+age);
}
在客户端实现的码代如下：
public class postService {
public static boolean save(String name, String age) throws Exception {
String path="http://10.254.1.62/WebForPOSTMethod/POSTMethodServlet";
Map<String, String> params=new HashMap<String, String>();
params.put("name", name);
params.put("age", age);
return SendPOSTRequest(path,params,"UTF-8");
}
private static boolean SendPOSTRequest(String path,
Map<String, String> params, String encoding) throws Exception {
StringBuilder sb=new StringBuilder();
if (params!=null&&!params.isEmpty()) {
for (Map.Entry<String, String> entry:params.entrySet()) {
sb.append(entry.getKey()).append("=");
sb.append(URLEncoder.encode(entry.getValue(),encoding));
sb.append("&");
}
sb.deleteCharAt(sb.length()-1);
}
byte[] data=sb.toString().getBytes();
HttpURLConnection connection=(HttpURLConnection) new URL(path).openConnection();
connection.setConnectTimeout(5000);
//答应对外接连数据
connection.setDoOutput(true);
connection.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
connection.setRequestProperty("Content-Length", data.length+"");
OutputStream outputStream =connection.getOutputStream();
outputStream.write(data);
outputStream.flush();
if (connection.getResponseCode()==200) {
return true;
}
return false;
}
}
然后呢，就是实在现android客户端的界面
public class POSTDateToWebActivity extends Activity {
EditText getname,getage;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.post);
getname=(EditText) findViewById(R.id.name);
getage=(EditText) findViewById(R.id.age);
}
public void save(View v){
boolean result=false;
String name=getname.getText().toString();
String age=getage.getText().toString();
try {
result=postService.save(name,age);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (result) {
Toast.makeText(this, "success",1).show();
}else {
Toast.makeText(this, "error",1).show();
}
}
}
实现结果如下：
文章结束给大家分享下程序员的一些笑话语录：
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