怎么改spring boot http port

Posted 2023-05-04

1. servlet配置
当应用只有默认的servlet（即DispatcherServlet）时，映射的url为/,存在其他的servlet时，映射的路径为servlet的注册的beanname(可通过@Component注解修改)，创建方式如下：

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@Component("myServlet")
public class MyServlet implements Servlet
/**
*
* @see javax.servlet.Servlet#destroy()
*/
@Override
public void destroy()
System.out.println("destroy...");

/**
* @return
* @see javax.servlet.Servlet#getServletConfig()
*/
@Override
public ServletConfig getServletConfig()
return null;

/**
* @return
* @see javax.servlet.Servlet#getServletInfo()
*/
@Override
public String getServletInfo()
return null;

/**
* @param arg0
* @throws ServletException
* @see javax.servlet.Servlet#init(javax.servlet.ServletConfig)
*/
@Override
public void init(ServletConfig arg0) throws ServletException
System.out.println("servlet init...");

/**
* @param arg0
* @param arg1
* @throws ServletException
* @throws IOException
* @see javax.servlet.Servlet#service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)
*/
@Override
public void service(ServletRequest arg0, ServletResponse arg1) throws ServletException,
IOException
System.out.println("service...");


2. filter配置
filter配置的映射是/*，创建方式如下：

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@Component("myFilter")
public class MyFilter implements Filter
/**
*
* @see javax.servlet.Filter#destroy()
*/
@Override
public void destroy()
System.out.println("destroy...");

/**
* @param arg0
* @param arg1
* @param arg2
* @throws IOException
* @throws ServletException
* @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
*/
@Override
public void doFilter(ServletRequest arg0, ServletResponse arg1, FilterChain arg2)
throws IOException,
ServletException
System.out.println("doFilter...");
arg2.doFilter(arg0, arg1);

/**
* @param arg0
* @throws ServletException
* @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
*/
@Override
public void init(FilterConfig arg0) throws ServletException
System.out.println("filter init...");


<span style="font-family: Arial, Helvetica, FreeSans, sans-serif; font-size: 13.3333330154419px; line-height: 17.3333339691162px; background-color: transparent;"> </span>

3. listener配置

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@Component("myListener")
public class MyListener implements ServletContextListener
/**
* @param arg0
* @see javax.servlet.ServletContextListener#contextDestroyed(javax.servlet.ServletContextEvent)
*/
@Override
public void contextDestroyed(ServletContextEvent arg0)
System.out.println("contextDestroyed...");

/**
* @param arg0
* @see javax.servlet.ServletContextListener#contextInitialized(javax.servlet.ServletContextEvent)
*/
@Override
public void contextInitialized(ServletContextEvent arg0)
System.out.println("listener contextInitialized...");



如果觉得控制力度不够灵活（例如你想修改filter的映射），spring boot还提供了 ServletRegistrationBean，FilterRegistrationBean，ServletListenerRegistrationBean这3个东西来进行配置

修改filter的映射

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@Configuration
public class WebConfig
@Bean
public FilterRegistrationBean filterRegistrationBean(MyFilter myFilter)
FilterRegistrationBean filterRegistrationBean = new FilterRegistrationBean();
filterRegistrationBean.setFilter(myFilter);
filterRegistrationBean.setEnabled(true);
filterRegistrationBean.addUrlPatterns("/bb");
return filterRegistrationBean;



4. 配置servlet 容器

可以通过两种方式配置servlet容器，一种是通过properties文件，例如：

[java] view plain copy
server.port=8081
server.address=127.0.0.1
server.sessionTimeout=30
server.contextPath=/springboot
完整的配置信息可以看这 http://github.com/spring-projects/spring-boot/tree/master/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/ServerProperties.java

另一种方式是Java代码的形式：

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@Component
public class MyCustomizationBean implements EmbeddedServletContainerCustomizer
/**
* @param container
* @see org.springframework.boot.context.embedded.EmbeddedServletContainerCustomizer#customize(org.springframework.boot.context.embedded.ConfigurableEmbeddedServletContainer)
*/
@Override
public void customize(ConfigurableEmbeddedServletContainer container)
container.setContextPath("/sprintboot");
container.setPort(8081);
container.setSessionTimeout(30);



5. error 处理

spring boot 提供了/error映射来进行错误处理，它会返回一个json来对错误信息进行描述（包含了http状态和异常信息）,例如404的错误

当然可以定制错误页面，通过实现ErrorController接口，并将它装配起来即可，如下：

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@Controller
public class ErrorHandleController implements ErrorController
/**
* @return
* @see org.springframework.boot.autoconfigure.web.ErrorController#getErrorPath()
*/
@Override
public String getErrorPath()
return "/screen/error";


@RequestMapping
public String errorHandle()
return getErrorPath();


还可以这样：

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@Component
private class MyCustomizer implements EmbeddedServletContainerCustomizer

@Override
public void customize(ConfigurableEmbeddedServletContainer container)
container.addErrorPages(new ErrorPage(HttpStatus.BAD_REQUEST, "/screen/error"));



6.模板引擎

spring boot 会自动配置 FreeMarker,Thymeleaf,Velocity，只需要在pom中加入相应的依赖即可，例如应用Velocity

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<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-velocity</artifactId>
</dependency>
默认配置下spring boot会从src/main/resources/templates目录中去找模板 参考技术A 配置文件指定端口即可
server.port=8889

spring boot 添加监控

在application.properties中，添加

        spring.application.name=Spring Boot Admin Web
        spring.boot.admin.url=http://localhost:${server.port}
        spring.jackson.serialization.indent_output=true
        endpoints.health.sensitive=false
        management.security.enabled=false
        ribbon.ReadTimeout=60000
        ribbon.ConnectTimeout=60000

在 启动类中添加

            @EnableAdminServer

在 pom.xml中添加

                <dependency>
                                    <groupId>de.codecentric</groupId>
                                    <artifactId>spring-boot-admin-server</artifactId>
                                    <version>1.5.7</version>
            </dependency>

            <dependency>
                <groupId>de.codecentric</groupId>
                <artifactId>spring-boot-admin-server-ui</artifactId>
                <version>1.5.7</version>
            </dependency>

            <dependency>
                <groupId>de.codecentric</groupId>
                <artifactId>spring-boot-admin-starter-client</artifactId>
                <version>1.5.7</version>
            </dependency>