这里只介绍htt方面。网络请求方式可分为get请求,post两种请求方式,GET方式在进行数据请求时,会把数据附加到URL后面传递给服务器,比如常见的:
http://XXX.XXX.XXX/XX.aspx?id=1,POST方式则是将请求的数据放到HTTP请求头中,作为请求头的一部分传入服务器。
所以,在进行HTTP编程前,首先要明确究竟使用的哪种方式进行数据请求的。
android中Http编程有两种:1、HttpURLConnection;2、HttpClient
首先介绍一下HttpURLConnection方式的get请求和post请求方法:
[java] view
plaincopyprint?
private Map<String, String> paramsValue;
String urlPath=null;
// 发送地
http://192.168.100.91:8080/myweb/login?username=abc&password=123 public void initData(){
urlPath="
http://192.168.100.91:8080/myweb/login";
paramsValue=new HashMap<String, String>();
paramsValue.put("username", "111");
paramsValue.put("password", "222");
}
private Map<String, String> paramsValue;
String urlPath=null;
// 发送地
http://192.168.100.91:8080/myweb/login?username=abc&password=123 public void initData(){
urlPath="
http://192.168.100.91:8080/myweb/login";
paramsValue=new HashMap<String, String>();
paramsValue.put("username", "111");
paramsValue.put("password", "222");
}
get方式发起请求:
[java] view
plaincopyprint?
private boolean sendGETRequest(String path, Map<String, String> params) throws Exception {
boolean success=false;
// StringBuilder是用来组拼请求地址和参数
StringBuilder sb = new StringBuilder();
sb.append(path).append("?");
if (params != null && params.size() != 0) {
for (Map.Entry<String, String> entry : params.entrySet()) {
// 如果请求参数中有中文,需要进行URLEncoder编码 gbk/utf8
sb.append(entry.getKey()).append("=").append(URLEncoder.encode(entry.getValue(), "utf-8"));
sb.append("&");
}
sb.deleteCharAt(sb.length() - 1);
}
URL url = new URL(sb.toString());
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(20000);
conn.setRequestMethod("GET");
if (conn.getResponseCode() == 200) {
success= true;
}
if(conn!=null)
conn.disconnect();
return success;
}
private boolean sendGETRequest(String path, Map<String, String> params) throws Exception {
boolean success=false;
// StringBuilder是用来组拼请求地址和参数
StringBuilder sb = new StringBuilder();
sb.append(path).append("?");
if (params != null && params.size() != 0) {
for (Map.Entry<String, String> entry : params.entrySet()) {
// 如果请求参数中有中文,需要进行URLEncoder编码 gbk/utf8
sb.append(entry.getKey()).append("=").append(URLEncoder.encode(entry.getValue(), "utf-8"));
sb.append("&");
}
sb.deleteCharAt(sb.length() - 1);
}
URL url = new URL(sb.toString());
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setConnectTimeout(20000);
conn.setRequestMethod("GET");
if (conn.getResponseCode() == 200) {
success= true;
}
if(conn!=null)
conn.disconnect();
return success;
}