java获取客户端ip
public String getIpAddr(HttpServletRequest request) {
String ip = request.getHeader("x-forwarded-for");
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("Proxy-Client-IP");
}
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getHeader("WL-Proxy-Client-IP");
}
if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
ip = request.getRemoteAddr();
}
return ip;
}
相关文档：
.class其实是在java运行时就加载进去的
getClass()是运行程序时动态加载的
下面以例子说明:
首先建一个基类Baseclass
package classyongfa;
public class Baseclass {
private String height;
public String getHeight()
{
return height;
}
public void setHeight(String height)
{
&n ......
今天公司不是很忙，就回顾了一下以前的冒泡排序和插入排序
package chen;
import java.util.Date;
public class Sort {
/**
* 冒泡排序
* @param list
* @author chenpengye
*/
public void sort(int[] list){
long begain=new Date().getTime();
&n ......
1.计算某一月份的最大天数
Calendar time=Calendar.getInstance();
time.clear();
time.set(Calendar.YEAR,year); //year 为 int
time.set(Calendar.MONTH,i-1);//注意,Calendar对象默认一月为0
int day=time.getActualMaximum(Calendar ......
package javatest_danny;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
public class pipeStreamTest {
public static void main(String[] args) {
try
{
&nbs ......
