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2年10月21天

不废话解决:EL表达式${}取不出值

解决方案:在web.xml中的 webapp里加入以下命名空间<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee

codeforces 1073C. Vasya and Robot

Vasya has got a robot which is situated on an infinite Cartesian plane, initially in the cell (0,0). Robot can perform the following four kinds of operations: U — move from (x,y) to (x,y+1); D — mo...

epoll示例(水平触发)

#include<stdio.h>#include<unistd.h>#include<sys/epoll.h>struct t_connection{ int fd; void *(*call)(t_connection*);};void* f(t_connection* c){ char bu...