SpringBoot整合Filter

SpringBoot 整合 Filter 方式一：通过注解扫描完成 Filter 组件的注册

创建项目，在pom.xml文件中导入依赖。

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1<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

2  <modelVersion>4.0.0</modelVersion>

3  <parent>

4    <groupId>org.springframework.boot</groupId>

5    <artifactId>spring-boot-starter-parent</artifactId>

6    <version>1.5.10.RELEASE</version>

7  </parent>

8  <groupId>com.bjsxt</groupId>

9  <artifactId>03-spring-boot-filter</artifactId>

10  <version>0.0.1-SNAPSHOT</version>

11  

12  <!-- jdk1.7 -->

13  <properties>

14      <java.version>1.7</java.version>

15  </properties>

16  

17  <dependencies>

18    <dependency>

19        <groupId>org.springframework.boot</groupId>

20        <artifactId>spring-boot-starter-web</artifactId>

21    </dependency>

22</dependencies>

23</project>

24

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编写Filter

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1package com.bjsxt.filter;

2

3import java.io.IOException;

4

5import javax.servlet.Filter;

6import javax.servlet.FilterChain;

7import javax.servlet.FilterConfig;

8import javax.servlet.ServletException;

9import javax.servlet.ServletRequest;

10import javax.servlet.ServletResponse;

11import javax.servlet.annotation.WebFilter;

12

13/**

14 *SpringBoot整合Filter 方式一

15 *<filter>

16 *    <filter-name>FirstFilter</filter-name>

17 *    <filter-class>com.bjsxt.filter.FirstFilter</filter-class>

18 *</filter>

19 *<filter-mapping>

20 *    <filter-name>FirstFilter</filter-name>

21 *    <url-pattern>/first</url-pattern>

22 *</filter-mapping>

23 */

24//@WebFilter(filterName="FirstFilter",urlPatterns={"*.do","*.jsp"})

25@WebFilter(filterName="FirstFilter",urlPatterns="/first")

26public class FirstFilter implements Filter {

27

28  @Override

29  public void destroy() {

30      // TODO Auto-generated method stub

31

32  }

33  @Override

34  public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)

35          throws IOException, ServletException {

36      System.out.println("进入Filter");

37      arg2.doFilter(arg0, arg1);

38      System.out.println("离开Filter");

39  }

40

41  @Override

42  public void init(FilterConfig arg0) throws ServletException {

43      // TODO Auto-generated method stub

44  }

45}

46

47

编写启动类

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1package com.bjsxt;

2

3import org.springframework.boot.SpringApplication;

4import org.springframework.boot.autoconfigure.SpringBootApplication;

5import org.springframework.boot.web.servlet.ServletComponentScan;

6

7/**

8 *SpringBoot整合Filter 方式一

9 *

10 */

11@SpringBootApplication

12@ServletComponentScan

13public class App {

14

15  public static void main(String[] args) {

16      SpringApplication.run(App.class, args);

17

18  }

19}

20

21

运行结果

SpringBoot 整合 Filter 方式二：通过方法完成 Filter 组件的注册

pom.xml文件同上

编写Filter

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1package com.bjsxt.filter;

2

3import java.io.IOException;

4

5import javax.servlet.Filter;

6import javax.servlet.FilterChain;

7import javax.servlet.FilterConfig;

8import javax.servlet.ServletException;

9import javax.servlet.ServletRequest;

10import javax.servlet.ServletResponse;

11/**

12 * 

13 *SpringBoot整合Filter 方式二

14 *

15 */

16public class SecondFilter implements Filter {

17  @Override

18  public void destroy() {

19      // TODO Auto-generated method stub

20  }

21  @Override

22  public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)

23          throws IOException, ServletException {

24      System.out.println("进入SecondFilter二");

25      arg2.doFilter(arg0, arg1);

26      System.out.println("离开SecondFilter二");

27  }

28

29  @Override

30  public void init(FilterConfig arg0) throws ServletException {

31      // TODO Auto-generated method stub

32  }

33}

34

35

编写启动类

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1package com.bjsxt;

2

3import org.springframework.boot.SpringApplication;

4import org.springframework.boot.autoconfigure.SpringBootApplication;

5import org.springframework.boot.web.servlet.FilterRegistrationBean;

6import org.springframework.boot.web.servlet.ServletRegistrationBean;

7import org.springframework.context.annotation.Bean;

8

9import com.bjsxt.filter.SecondFilter;

10import com.bjsxt.servlet.SecondServlet;

11

12/**

13 * SpringBoot整合Filter方式二

14 *

15 *

16 */

17@SpringBootApplication

18public class App2 {

19

20  public static void main(String[] args) {

21      SpringApplication.run(App2.class, args);

22  }

23  

24  /**

25   * 注册Servlet

26   * @return

27   */

28  @Bean

29  public ServletRegistrationBean getServletRegistrationBean(){

30      ServletRegistrationBean bean = new ServletRegistrationBean(new SecondServlet());

31      bean.addUrlMappings("/second");

32      return bean;

33  }

34  

35  /**

36   * 注册Filter

37   */

38  @Bean

39  public FilterRegistrationBean getFilterRegistrationBean(){

40      FilterRegistrationBean bean = new FilterRegistrationBean(new SecondFilter());

41      //bean.addUrlPatterns(new String[]{"*.do","*.jsp"});

42      bean.addUrlPatterns("/second2");

43      return bean;

44  }

45}

46

47

测试运行结果