package org.te;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Date;
public class GetParamter {
public static void main(String[] args) throws Exception {
User user = new User();
user.setId(1);
user.setName("name");
String param = GetParamter.getPara(user);
System.out.println(param);
}
public static String getPara(Gen<?> gen) throws Exception {
Class<?> clz = gen.getGenType().getClass();
StringBuffer result = new StringBuffer(512);
Field[] field = clz.getDeclaredFields();
result.append("?=");
for (Field f : field) {
Object o = getMethodValue(clz, gen.getGenType(), f.getName());
if (o != null && !"".equals(o.toString())) {
result.append(o + "&");
}
}
result.delete(result.length() - 1, result.length());
return result.toString();
}
/**
* 根据字段获取值
*
* @param clz
* @param o
* @param field
* @return
*/
@SuppressWarnings("rawtypes")
public static Object getMethodValue(Class clz, Object o, String field)
throws NoSuchMethodException, SecurityException,
IllegalAccessException, IllegalArgumentException,
InvocationTargetException {
Character charss = field.charAt(0);
field = field.replaceFirst(charss.toString(),
Character.toUpperCase(charss) + "");
// 获取值
@SuppressWarnings("unchecked")
Method getMethod = clz.getDeclaredMethod("get" + field, new Class[] {});
Object value = getMethod.invoke(o, new Object[] {});
return value;
}
public static String converType(Object value, String dateFormat) {
String rResult = "";
// if (value instanceof Integer)
// {
// int result = (Integer) value;
// return result;
//
// } else if (value instanceof Float)
// {
// float result = (Float) value;
// return result;
//
// } else if (value instanceof Double)
// {
// double result = (Double) value;
// return result;
//
// } else if (value instanceof Long)
// {
// long result = (Long) value;
// return result;
// }
// if (value instanceof Boolean)
// {
// boolean result = (Boolean) value;
// return result;
//
// } else
if (value instanceof Date) {
Date date = (Date) value;
if ("".equals(dateFormat) || null == dateFormat) {
dateFormat = "yyyy-MM-dd";
}
// IllegalArgumentException
SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
rResult = sdf.format(date);
} else if (value instanceof byte[]) {
//
} else {
return value + "";
}
return rResult;
}
}
package org.te;
public interface Gen<T> {
T getGenType();
}
package org.te;
public class User implements Gen<User> {
private Integer id;
private String name;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public User getGenType() {
return this;
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + "]";
}
}
http-----------------------
package org.te;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;
public class HttpRequest {
/**
* 向指定URL发送GET方法的请求
*
* @param url
* 发送请求的URL
* @param param
* 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @return URL 所代表远程资源的响应结果
*/
public static String sendGet(String url, String param) {
String result = "";
BufferedReader in = null;
try {
String urlNameString = url + "?" + param;
URL realUrl = new URL(urlNameString);
// 打开和URL之间的连接
URLConnection connection = realUrl.openConnection();
// 设置通用的请求属性
connection.setRequestProperty("accept", "*/*");
connection.setRequestProperty("connection", "Keep-Alive");
connection.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 建立实际的连接
connection.connect();
// 获取所有响应头字段
Map<String, List<String>> map = connection.getHeaderFields();
// 遍历所有的响应头字段
for (String key : map.keySet()) {
System.out.println(key + "--->" + map.get(key));
}
// 定义 BufferedReader输入流来读取URL的响应
in = new BufferedReader(new InputStreamReader(
connection.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送GET请求出现异常！" + e);
e.printStackTrace();
}
// 使用finally块来关闭输入流
finally {
try {
if (in != null) {
in.close();
}
} catch (Exception e2) {
e2.printStackTrace();
}
}
return result;
}
/**
* 向指定 URL 发送POST方法的请求
*
* @param url
* 发送请求的 URL
* @param param
* 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
* @return 所代表远程资源的响应结果
*/
public static String sendPost(String url, String param) {
PrintWriter out = null;
BufferedReader in = null;
String result = "";
try {
URL realUrl = new URL(url);
// 打开和URL之间的连接
URLConnection conn = realUrl.openConnection();
// 设置通用的请求属性
conn.setRequestProperty("Referer", "http://www.baidu.com");
conn.setRequestProperty("accept", "*/*");
conn.setRequestProperty("connection", "Keep-Alive");
conn.setRequestProperty("user-agent",
"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
// 发送POST请求必须设置如下两行
conn.setDoOutput(true);
conn.setDoInput(true);
// 获取URLConnection对象对应的输出流
out = new PrintWriter(conn.getOutputStream());
// 发送请求参数
out.print(param);
// flush输出流的缓冲
out.flush();
// 定义BufferedReader输入流来读取URL的响应
in = new BufferedReader(
new InputStreamReader(conn.getInputStream()));
String line;
while ((line = in.readLine()) != null) {
result += line;
}
} catch (Exception e) {
System.out.println("发送 POST 请求出现异常！"+e);
e.printStackTrace();
}
//使用finally块来关闭输出流、输入流
finally{
try{
if(out!=null){
out.close();
}
if(in!=null){
in.close();
}
}
catch(IOException ex){
ex.printStackTrace();
}
}
return result;
}
public static void main(String[] args) {
//发送 GET 请求
// String s=HttpRequest.sendGet("http://192.168.20.249:8888/api/User/Login", "LoginName=en&LoginPwd=en");
// System.out.println(s);
//发送 POST 请求
String sr=HttpRequest.sendPost("http://192.168.20.249:8888/api/User/Login", "LoginName=en&LoginPwd=en");
System.out.println(sr);
}
}
