Spring Boot Reference Tutorial (vi) Spring boot configuration Servlet,filter,listener,interceptor

4.2.5. Spring Boot Configuration Servlet,filter,listener,interceptor1. Configuring the Servlet

Some scenarios in development often use servlets, such as user logout . The following shows how to configure .

There are two ways to configure the use of Servlets, one to use annotations, and one to use a configuration class.

There are two ways to configure a servlet:

(1) annotation configuration Servlet

When you write a simple servlet that accesses this servlet, it jumps to the home page and adds an annotation @WebServlet (value = "/configservlet") to the servlet:

add annotations on the application class @ServletComponentScan

Post-launch access test:

Access:

Access results:

Jump Success!

(2) Code configuration Servlet

Add the following code after annotating the annotations with the servlet code above:

Test success!

2. Configure the filter

There are two configuration options for configuring a filter like configuration servlet:

(1) annotation configuration Filter

Write a filter to add an annotation @WebFilter ("/*"):

add annotations on the application class @ServletComponentScan

Start Access:

Access results:

Note: For a more detailed configuration of filter, you can view the configuration properties in note @webfilter ("/*"), such as configuring filter order of filters.

(2) Code configuration Filter

Note Write the configuration code after the annotations above:

Note: Filterregistrationbean. setorder (0); method to set the filter's order in the filter chain.

No more testing!

3. Configure Listener

There are two ways to configure listener with the Servlet, Fiter:

(1) annotation configuration Listener

The code is as follows:

Note: the optional listener for custom configuration listener is like the following table:

add annotations to the Application class:@ServletComponentScan

To start the test:

(2) Code configuration Listener

Note the above annotations and write the code:

No more testing!

4. Configure Interceptor

To write an interceptor:

To write a configuration class:

Test:

To access any available request:

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Spring Boot Reference Tutorial (vi) Spring boot configuration Servlet,filter,listener,interceptor