Servlets (jeeweb-core 1.0.1 API)

java.lang.Object
- cn.net.wanmo.util.Servlets

```
public class Servlets
extends Object
```
Http与Servlet工具类.

字段概要

字段
限定符和类型字段和说明

static long ONE_YEAR_SECONDS

字段
限定符和类型	字段和说明
`static long`	`ONE_YEAR_SECONDS`

构造器概要

构造器
构造器和说明

Servlets()

构造器
构造器和说明
`Servlets()`

方法概要

所有方法静态方法具体方法
限定符和类型	方法和说明
`static boolean`	`checkIfModifiedSince(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, long lastModified)` 根据浏览器If-Modified-Since Header, 计算文件是否已被修改.
`static boolean`	`checkIfNoneMatchEtag(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, String etag)` 根据浏览器 If-None-Match Header, 计算Etag是否已无效.
`static String`	`encodeHttpBasic(String userName, String password)` 客户端对Http Basic验证的 Header进行编码.
`static String`	`encodeParameterStringWithPrefix(Map<String,Object> params, String prefix)` 组合Parameters生成Query String的Parameter部分,并在paramter name上加上prefix.
`static Map<String,Object>`	`getParametersStartingWith(javax.servlet.ServletRequest request, String prefix)` 取得带相同前缀的Request Parameters, copy from spring WebUtils.
`static javax.servlet.http.HttpServletRequest`	`getRequest()` 获取当前请求对象
`static boolean`	`isAjax(javax.servlet.ServletRequest request)` 是否是 Ajax 请求
`static boolean`	`isStaticFile(String uri)` 判断访问URI是否是静态文件请求
`static void`	`setEtag(javax.servlet.http.HttpServletResponse response, String etag)` 设置Etag Header.
`static void`	`setExpiresHeader(javax.servlet.http.HttpServletResponse response, long expiresSeconds)` 设置客户端缓存过期时间的Header.
`static void`	`setFileDownloadHeader(javax.servlet.http.HttpServletResponse response, String fileName)` 设置让浏览器弹出下载对话框的Header.
`static void`	`setLastModifiedHeader(javax.servlet.http.HttpServletResponse response, long lastModifiedDate)` 设置LastModified Header.
`static void`	`setNoCacheHeader(javax.servlet.http.HttpServletResponse response)` 设置禁止客户端缓存的Header.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料
- ONE_YEAR_SECONDS
```
public static final long ONE_YEAR_SECONDS
```
  另请参阅:
  
  常量字段值

构造器详细资料
- Servlets
```
public Servlets()
```

方法详细资料

setExpiresHeader

public static void setExpiresHeader(javax.servlet.http.HttpServletResponse response,
                                    long expiresSeconds)

设置客户端缓存过期时间的Header.

setNoCacheHeader

public static void setNoCacheHeader(javax.servlet.http.HttpServletResponse response)

设置禁止客户端缓存的Header.

setLastModifiedHeader

public static void setLastModifiedHeader(javax.servlet.http.HttpServletResponse response,
                                         long lastModifiedDate)

设置LastModified Header.

setEtag

public static void setEtag(javax.servlet.http.HttpServletResponse response,
                           String etag)

设置Etag Header.

checkIfModifiedSince

public static boolean checkIfModifiedSince(javax.servlet.http.HttpServletRequest request,
                                           javax.servlet.http.HttpServletResponse response,
                                           long lastModified)

根据浏览器If-Modified-Since Header, 计算文件是否已被修改. 如果无修改, checkIfModify返回false ,设置304 not modify status.

参数:: lastModified - 内容的最后修改时间.

checkIfNoneMatchEtag

public static boolean checkIfNoneMatchEtag(javax.servlet.http.HttpServletRequest request,
                                           javax.servlet.http.HttpServletResponse response,
                                           String etag)

根据浏览器 If-None-Match Header, 计算Etag是否已无效. 如果Etag有效, checkIfNoneMatch返回false, 设置304 not modify status.

参数:: etag - 内容的ETag.

setFileDownloadHeader

public static void setFileDownloadHeader(javax.servlet.http.HttpServletResponse response,
                                         String fileName)

设置让浏览器弹出下载对话框的Header.

参数:: fileName - 下载后的文件名.

getParametersStartingWith

public static Map<String,Object> getParametersStartingWith(javax.servlet.ServletRequest request,
                                                           String prefix)

取得带相同前缀的Request Parameters, copy from spring WebUtils. 返回的结果的Parameter名已去除前缀.

encodeParameterStringWithPrefix

public static String encodeParameterStringWithPrefix(Map<String,Object> params,
                                                     String prefix)

组合Parameters生成Query String的Parameter部分,并在paramter name上加上prefix.

encodeHttpBasic

public static String encodeHttpBasic(String userName,
                                     String password)

客户端对Http Basic验证的 Header进行编码.

getRequest

public static javax.servlet.http.HttpServletRequest getRequest()

获取当前请求对象

返回:

isStaticFile
```
public static boolean isStaticFile(String uri)
```
判断访问URI是否是静态文件请求

抛出:

Exception

isAjax

public static boolean isAjax(javax.servlet.ServletRequest request)

是否是 Ajax 请求

参数:: request -
返回:

类 Servlets

字段概要

构造器概要