Constants (Apache Tomcat 7.0.109 API Documentation)

java.lang.Object
- org.apache.jasper.Constants

```
public class Constants
extends Object
```
Some constants and other global data that are used by the compiler and the runtime.

Author:

Anil K. Vijendran, Harish Prabandham, Shawn Bayern, Mark Roth

Field Summary

Fields
Modifier and Type	Field and Description
`static String`	`ALT_DD_ATTR`
`static List<String>`	`CACHED_DTD_PUBLIC_IDS`
`static List<String>`	`CACHED_DTD_RESOURCE_PATHS`
`static String`	`CATALINA_BASE_PROP` Name of the system property containing the tomcat instance installation path
`static String`	`CATALINA_HOME_PROP` Name of the system property containing the tomcat product installation path
`static int`	`DEFAULT_BUFFER_SIZE` Default size of the JSP buffer.
`static String`	`DEFAULT_JAR_SKIP_PROP` Name of system property containing default list of JARs to skip when scanning JARs for configuration elements such as TLDs.
`static int`	`DEFAULT_TAG_BUFFER_SIZE` Default size for the tag buffers.
`static String`	`IE_PLUGIN_URL`
`static boolean`	`IS_SECURITY_ENABLED` Has security been turned on?
`static String`	`JSP_FILE` Deprecated. This will be removed in Tomcat 9.0.x onwards. It is replaced by the use of the jspFile servlet initialisation parameter
`static String`	`JSP_PACKAGE_NAME` The default package name for compiled jsp pages.
`static String`	`JSP_SERVLET_BASE` The base class of the generated servlets.
`static int`	`MAX_POOL_SIZE` Default tag handler pool size.
`static String`	`NEWLINE` Platform specific new line sequence.
`static String`	`NS_PLUGIN_URL` Default URLs to download the plugin for Netscape and IE.
`static String`	`PRECOMPILE` The query parameter that causes the JSP engine to just pregenerated the servlet but not invoke it.
`static String`	`SERVICE_METHOD_NAME` _jspService is the name of the method that is called by HttpJspBase.service().
`static String`	`SERVLET_CLASSPATH` ServletContext attribute for classpath.
`static String`	`SERVLET_CONTENT_TYPE` Default servlet content type.
`static String`	`SESSION_PARAMETER_NAME` The name of the path parameter used to pass the session identifier back and forth with the client.
`static String`	`SPEC_VERSION`
`static List<String>`	`STANDARD_IMPORTS`
`static String`	`TAG_FILE_PACKAGE_NAME` The default package name for tag handlers generated from tag files
`static String`	`TAGLIB_DTD_PUBLIC_ID_11` Public Id and the Resource path (of the cached copy) of the DTDs for tag library descriptors.
`static String`	`TAGLIB_DTD_PUBLIC_ID_12`
`static String`	`TAGLIB_DTD_RESOURCE_PATH_11`
`static String`	`TAGLIB_DTD_RESOURCE_PATH_12`
`static String`	`TEMP_VARIABLE_NAME_PREFIX` Prefix to use for generated temporary variable names
`static String`	`TLD_JAR_SKIP_PROP` Name of system property containing additional list of JARs to skip when scanning for TLDs.
`static boolean`	`USE_INSTANCE_MANAGER_FOR_TAGS`
`static String`	`WEBAPP_DTD_PUBLIC_ID_22` Public Id and the Resource path (of the cached copy) of the DTDs for web application deployment descriptors
`static String`	`WEBAPP_DTD_PUBLIC_ID_23`
`static String`	`WEBAPP_DTD_RESOURCE_PATH_22`
`static String`	`WEBAPP_DTD_RESOURCE_PATH_23`
`static String`	`XML_BLOCK_EXTERNAL_INIT_PARAM` Name of the ServletContext init-param that determines if the XML parsers will block the resolution of external entities.
`static String`	`XML_VALIDATION_INIT_PARAM` Name of the ServletContext init-param that determines if the XML parsers used for web.xml files will be validating or not.
`static String`	`XML_VALIDATION_TLD_INIT_PARAM` Name of the ServletContext init-param that determines if the XML parsers used for *.tld files will be validating or not.

Constructor Summary

Constructors
Constructor and Description

Constants()

Constructors
Constructor and Description
`Constants()`

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - SPEC_VERSION
```
public static final String SPEC_VERSION
```
    See Also:
    Constant Field Values
  - JSP_SERVLET_BASE
```
public static final String JSP_SERVLET_BASE
```
    The base class of the generated servlets.
  - SERVICE_METHOD_NAME
```
public static final String SERVICE_METHOD_NAME
```
    _jspService is the name of the method that is called by HttpJspBase.service(). This is where most of the code generated from JSPs go.
  - SERVLET_CONTENT_TYPE
```
public static final String SERVLET_CONTENT_TYPE
```
    Default servlet content type.
    
    See Also:
    Constant Field Values
  - STANDARD_IMPORTS
```
public static final List<String> STANDARD_IMPORTS
```
  - SERVLET_CLASSPATH
```
public static final String SERVLET_CLASSPATH
```
    ServletContext attribute for classpath. This is tomcat specific. Other servlet engines may choose to support this attribute if they want to have this JSP engine running on them.
  - JSP_FILE
```
@Deprecated
public static final String JSP_FILE
```
    Deprecated. This will be removed in Tomcat 9.0.x onwards. It is replaced by the use of the jspFile servlet initialisation parameter
    
    Request attribute for <jsp-file> element of a servlet definition. If present on a request, this overrides the value returned by request.getServletPath() to select the JSP page to be executed.
  - DEFAULT_BUFFER_SIZE
```
public static final int DEFAULT_BUFFER_SIZE
```
    Default size of the JSP buffer.
    
    See Also:
    Constant Field Values
  - DEFAULT_TAG_BUFFER_SIZE
```
public static final int DEFAULT_TAG_BUFFER_SIZE
```
    Default size for the tag buffers.
    
    See Also:
    Constant Field Values
  - MAX_POOL_SIZE
```
public static final int MAX_POOL_SIZE
```
    Default tag handler pool size.
    
    See Also:
    Constant Field Values
  - NEWLINE
```
public static final String NEWLINE
```
    Platform specific new line sequence.
  - PRECOMPILE
```
public static final String PRECOMPILE
```
    The query parameter that causes the JSP engine to just pregenerated the servlet but not invoke it.
  - JSP_PACKAGE_NAME
```
public static final String JSP_PACKAGE_NAME
```
    The default package name for compiled jsp pages.
  - TAG_FILE_PACKAGE_NAME
```
public static final String TAG_FILE_PACKAGE_NAME
```
    The default package name for tag handlers generated from tag files
  - ALT_DD_ATTR
```
public static final String ALT_DD_ATTR
```
  - TAGLIB_DTD_PUBLIC_ID_11
```
public static final String TAGLIB_DTD_PUBLIC_ID_11
```
    Public Id and the Resource path (of the cached copy) of the DTDs for tag library descriptors.
    
    See Also:
    Constant Field Values
  - TAGLIB_DTD_RESOURCE_PATH_11
```
public static final String TAGLIB_DTD_RESOURCE_PATH_11
```
    See Also:
    Constant Field Values
  - TAGLIB_DTD_PUBLIC_ID_12
```
public static final String TAGLIB_DTD_PUBLIC_ID_12
```
    See Also:
    Constant Field Values
  - TAGLIB_DTD_RESOURCE_PATH_12
```
public static final String TAGLIB_DTD_RESOURCE_PATH_12
```
    See Also:
    Constant Field Values
  - WEBAPP_DTD_PUBLIC_ID_22
```
public static final String WEBAPP_DTD_PUBLIC_ID_22
```
    Public Id and the Resource path (of the cached copy) of the DTDs for web application deployment descriptors
    
    See Also:
    Constant Field Values
  - WEBAPP_DTD_RESOURCE_PATH_22
```
public static final String WEBAPP_DTD_RESOURCE_PATH_22
```
    See Also:
    Constant Field Values
  - WEBAPP_DTD_PUBLIC_ID_23
```
public static final String WEBAPP_DTD_PUBLIC_ID_23
```
    See Also:
    Constant Field Values
  - WEBAPP_DTD_RESOURCE_PATH_23
```
public static final String WEBAPP_DTD_RESOURCE_PATH_23
```
    See Also:
    Constant Field Values
  - CACHED_DTD_PUBLIC_IDS
```
public static final List<String> CACHED_DTD_PUBLIC_IDS
```
  - CACHED_DTD_RESOURCE_PATHS
```
public static final List<String> CACHED_DTD_RESOURCE_PATHS
```
  - NS_PLUGIN_URL
```
public static final String NS_PLUGIN_URL
```
    Default URLs to download the plugin for Netscape and IE.
    
    See Also:
    Constant Field Values
  - IE_PLUGIN_URL
```
public static final String IE_PLUGIN_URL
```
    See Also:
    Constant Field Values
  - TEMP_VARIABLE_NAME_PREFIX
```
public static final String TEMP_VARIABLE_NAME_PREFIX
```
    Prefix to use for generated temporary variable names
  - IS_SECURITY_ENABLED
```
public static final boolean IS_SECURITY_ENABLED
```
    Has security been turned on?
  - USE_INSTANCE_MANAGER_FOR_TAGS
```
public static final boolean USE_INSTANCE_MANAGER_FOR_TAGS
```
  - SESSION_PARAMETER_NAME
```
public static final String SESSION_PARAMETER_NAME
```
    The name of the path parameter used to pass the session identifier back and forth with the client.
  - CATALINA_HOME_PROP
```
public static final String CATALINA_HOME_PROP
```
    Name of the system property containing the tomcat product installation path
    
    See Also:
    Constant Field Values
  - CATALINA_BASE_PROP
```
public static final String CATALINA_BASE_PROP
```
    Name of the system property containing the tomcat instance installation path
    
    See Also:
    Constant Field Values
  - DEFAULT_JAR_SKIP_PROP
```
public static final String DEFAULT_JAR_SKIP_PROP
```
    Name of system property containing default list of JARs to skip when scanning JARs for configuration elements such as TLDs.
    
    See Also:
    Constant Field Values
  - TLD_JAR_SKIP_PROP
```
public static final String TLD_JAR_SKIP_PROP
```
    Name of system property containing additional list of JARs to skip when scanning for TLDs.
    
    See Also:
    Constant Field Values
  - XML_VALIDATION_TLD_INIT_PARAM
```
public static final String XML_VALIDATION_TLD_INIT_PARAM
```
    Name of the ServletContext init-param that determines if the XML parsers used for *.tld files will be validating or not.
    This must be kept in sync with org.apache.catalina.Globals
    
    See Also:
    Constant Field Values
  - XML_VALIDATION_INIT_PARAM
```
public static final String XML_VALIDATION_INIT_PARAM
```
    Name of the ServletContext init-param that determines if the XML parsers used for web.xml files will be validating or not.
    This must be kept in sync with org.apache.catalina.Globals
    
    See Also:
    Constant Field Values
  - XML_BLOCK_EXTERNAL_INIT_PARAM
```
public static final String XML_BLOCK_EXTERNAL_INIT_PARAM
```
    Name of the ServletContext init-param that determines if the XML parsers will block the resolution of external entities.
    This must be kept in sync with org.apache.catalina.Globals
    
    See Also:
    Constant Field Values
- Constructor Detail
  - Constants
```
public Constants()
```

Class Constants

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

SPEC_VERSION

JSP_SERVLET_BASE

SERVICE_METHOD_NAME

SERVLET_CONTENT_TYPE

STANDARD_IMPORTS

SERVLET_CLASSPATH

JSP_FILE

DEFAULT_BUFFER_SIZE

DEFAULT_TAG_BUFFER_SIZE

MAX_POOL_SIZE

NEWLINE

PRECOMPILE

JSP_PACKAGE_NAME

TAG_FILE_PACKAGE_NAME

ALT_DD_ATTR

TAGLIB_DTD_PUBLIC_ID_11

TAGLIB_DTD_RESOURCE_PATH_11

TAGLIB_DTD_PUBLIC_ID_12

TAGLIB_DTD_RESOURCE_PATH_12

WEBAPP_DTD_PUBLIC_ID_22

WEBAPP_DTD_RESOURCE_PATH_22

WEBAPP_DTD_PUBLIC_ID_23

WEBAPP_DTD_RESOURCE_PATH_23

CACHED_DTD_PUBLIC_IDS

CACHED_DTD_RESOURCE_PATHS

NS_PLUGIN_URL

IE_PLUGIN_URL

TEMP_VARIABLE_NAME_PREFIX

IS_SECURITY_ENABLED

USE_INSTANCE_MANAGER_FOR_TAGS

SESSION_PARAMETER_NAME

CATALINA_HOME_PROP

CATALINA_BASE_PROP

DEFAULT_JAR_SKIP_PROP

TLD_JAR_SKIP_PROP

XML_VALIDATION_TLD_INIT_PARAM

XML_VALIDATION_INIT_PARAM

XML_BLOCK_EXTERNAL_INIT_PARAM

Constructor Detail

Constants