JAVA-84: Move articles out of spring-boot part 1 (#9950)

* JAVA-84: Moved 1 article to spring-boot-actuator * JAVA-84: Moved 2 articles to spring-boot-mvc * JAVA-84: README changes for spring-boot module * JAVA-84: Moved classes to com.baeldung pkg to correct compilation issue
2020-08-31 20:41:47 +05:30
parent 8cf889d27e
commit e0ebf5904f
29 changed files with 181 additions and 36 deletions
@@ -0,0 +1,25 @@
+package com.baeldung.annotation.servletcomponentscan;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.web.servlet.ServletComponentScan;
+
+/**
+ * using the following annotations are equivalent:
+ * <ul><li>
+ * <code>@ServletComponentScan</code>
+ * </li><li>
+ * <code>@ServletComponentScan(basePackages = "com.baeldung.annotation.servletcomponentscan.components")</code>
+ * </li><li>
+ * <code>@ServletComponentScan(basePackageClasses = {AttrListener.class, HelloFilter.class, HelloServlet.class, EchoServlet.class})</code>
+ * </li></ul>
+ */
+@SpringBootApplication
+@ServletComponentScan("com.baeldung.annotation.servletcomponentscan.components")
+public class SpringBootAnnotatedApp {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringBootAnnotatedApp.class, args);
+    }
+
+}
@@ -0,0 +1,13 @@
+package com.baeldung.annotation.servletcomponentscan;
+
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.ComponentScan;
+
+@SpringBootApplication
+@ComponentScan(basePackages = "com.baeldung.annotation.servletcomponentscan.components")
+public class SpringBootPlainApp {
+
+    public static void main(String[] args) {
+    }
+
+}
@@ -0,0 +1,21 @@
+package com.baeldung.annotation.servletcomponentscan.components;
+
+import javax.servlet.ServletContextEvent;
+import javax.servlet.ServletContextListener;
+import javax.servlet.annotation.WebListener;
+
+@WebListener
+public class AttrListener implements ServletContextListener {
+
+    @Override
+    public void contextInitialized(ServletContextEvent servletContextEvent) {
+        servletContextEvent.getServletContext().setAttribute("servlet-context-attr", "test");
+        System.out.println("context init");
+    }
+
+    @Override
+    public void contextDestroyed(ServletContextEvent servletContextEvent) {
+        System.out.println("context destroy");
+    }
+
+}
@@ -0,0 +1,27 @@
+package com.baeldung.annotation.servletcomponentscan.components;
+
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.StandardCopyOption;
+
+@WebServlet(name = "echo servlet", urlPatterns = "/echo")
+public class EchoServlet extends HttpServlet {
+
+    @Override
+    public void doPost(HttpServletRequest request, HttpServletResponse response) {
+        try {
+            Path path = File.createTempFile("echo", "tmp").toPath();
+            Files.copy(request.getInputStream(), path, StandardCopyOption.REPLACE_EXISTING);
+            Files.copy(path, response.getOutputStream());
+            Files.delete(path);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}
@@ -0,0 +1,30 @@
+package com.baeldung.annotation.servletcomponentscan.components;
+
+import javax.servlet.*;
+import javax.servlet.annotation.WebFilter;
+import javax.servlet.annotation.WebInitParam;
+import java.io.IOException;
+
+@WebFilter(urlPatterns = "/hello", description = "a filter for hello servlet", initParams = { @WebInitParam(name = "msg", value = "filtering ") }, filterName = "hello filter", servletNames = { "echo servlet" })
+public class HelloFilter implements Filter {
+
+    private FilterConfig filterConfig;
+
+    @Override
+    public void init(FilterConfig filterConfig) throws ServletException {
+        System.out.println("filter init");
+        this.filterConfig = filterConfig;
+    }
+
+    @Override
+    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
+        servletResponse.getOutputStream().print(filterConfig.getInitParameter("msg"));
+        filterChain.doFilter(servletRequest, servletResponse);
+    }
+
+    @Override
+    public void destroy() {
+        System.out.println("filter destroy");
+    }
+
+}
@@ -0,0 +1,30 @@
+package com.baeldung.annotation.servletcomponentscan.components;
+
+import javax.servlet.ServletConfig;
+import javax.servlet.annotation.WebInitParam;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+@WebServlet(urlPatterns = "/hello", initParams = { @WebInitParam(name = "msg", value = "hello") })
+public class HelloServlet extends HttpServlet {
+
+    private ServletConfig servletConfig;
+
+    @Override
+    public void init(ServletConfig servletConfig) {
+        this.servletConfig = servletConfig;
+    }
+
+    @Override
+    public void doGet(HttpServletRequest request, HttpServletResponse response) {
+        try {
+            response.getOutputStream().write(servletConfig.getInitParameter("msg").getBytes());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+}
@@ -0,0 +1,14 @@
+package com.baeldung.internationalization;
+
+import javax.annotation.security.RolesAllowed;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class InternationalizationApp {
+    @RolesAllowed("*")
+    public static void main(String[] args) {
+        SpringApplication.run(InternationalizationApp.class, args);
+    }
+}
@@ -0,0 +1,36 @@
+package com.baeldung.internationalization.config;
+
+import java.util.Locale;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.servlet.LocaleResolver;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
+import org.springframework.web.servlet.i18n.SessionLocaleResolver;
+
+@Configuration
+@ComponentScan(basePackages = "com.baeldung.internationalization.config")
+public class MvcConfig implements WebMvcConfigurer {
+
+    @Bean
+    public LocaleResolver localeResolver() {
+        SessionLocaleResolver slr = new SessionLocaleResolver();
+        slr.setDefaultLocale(Locale.US);
+        return slr;
+    }
+
+    @Bean
+    public LocaleChangeInterceptor localeChangeInterceptor() {
+        LocaleChangeInterceptor lci = new LocaleChangeInterceptor();
+        lci.setParamName("lang");
+        return lci;
+    }
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        registry.addInterceptor(localeChangeInterceptor());
+    }
+}
@@ -0,0 +1,14 @@
+package com.baeldung.internationalization.config;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+
+@Controller
+public class PageController {
+
+    @GetMapping("/international")
+    public String getInternationalPage() {
+        return "thymeleaf/international";
+    }
+
+}