Request
获取数据
| calss request | meaning |
|---|---|
| getParameter("name") | 获取1个name参数对应的值 |
| getAllParameter("name") | 获取所有name对应的值，返回[]String |
| Enumeration getParameterNames() | |
| Object getAttribute(String key) | 返回Map映射中key对应的值 |
| void setAttribute(String key,Object value) | |
| Enumeration getAttributeNames() |
获取客户及服务器的机器信息
| 方法 | meaning |
|---|---|
| String getRemoteAddr | 获取客户端的IP地址 |
| String getRemoteHost | |
| String getRemoteUser | |
| String getLocalName | |
| String getLocalAddr | |
| String getLocalPort |
response
| method | meaning |
|---|---|
| void setHeader(String key,String value) | |
| vlid addHeader(String key,String value) | |
| Collection getHeaderNames() | |
| String getHeader(String key) | |
| Collection getHeaders(String key) | |
| void setContentType(String type) |
Shared var object
application session request
| Session | meaning |
|---|---|
| getId() | return session ID |
| boolean isNew() | return is a new session |
| setAttribute(Stirng key,String object) | put key-value in session |
| ObjectgetAttribute(String name) | |
| Enumeration getAttributeNames() | |
| long getCreationTime() | |
| long getLastAccessTime | |
| setMaxInactive Interval | set session max-time |
| set invalidate() | clear the session |
| application | |
|---|---|
| String getInitParameter(String name) | for read web.xml |
| void log(String msg) | |
| void log(Stirng msg,Throwable th) | print msg in log file |
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