Case study of JSP custom tag

• Java

This paper introduces the case of JSP custom tag for your reference. The specific contents are as follows

Case 1: implement a basic anti-theft chain label

1. Label processing

2. Description document

3. Introduction and use

JSP2. 0 custom label

---|Simpletag interface

Defines the lifecycle method of the label processing class. doTag()

-----|Simpletagsupport class

All the methods of simpletag interface are implemented, so we only need to inherit and override this class later.

Case 2: implement your own if Else tag

Objectives:

analysis:

1. ChooseTag. Java, you must define a tag field attribute

2. WhenTag. java

3. Otherwise. java

4. Description document

5. Introduction and use

Package custom label Library

1. Create a taglibs folder

2. Copy the class files corresponding to all label processing classes together with the package to the directory in 1

3. Create a meta inf folder in the folder in 1

4. Copy the TLD file to the meta inf directory

5. Edit TLD file and introduce URI element: < URI > http://www.jnb.com < / URI > long provides the URL path of the import

6. Use the jar command to package: D: \ mytaglibs > jar CVF JNB jar *

summary

Mainly master how to use JSP 2 0 to develop and package custom labels.

1. Create a taglibs folder

2. Copy the class files corresponding to all label processing classes together with the package to the directory in 1

3. Create a meta inf folder in the folder in 1

4. Copy the TLD file to the meta inf directory

5. Edit TLD file and introduce URI element: < URI > http://www.jnb.com < / URI > long provides the URL path of the import

6. Use the jar command to package: D: \ mytaglibs > jar CVF JNB jar *

summary

Mainly master how to use JSP 2 0 to develop and package custom labels.

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