Added code for https://jstobigdata.com/spring/handle-resources-in-spring/

Author: Bikraji

pom.xml

@@ -29,6 +29,7 @@
     <module>spring-aop-09-custom-annotation</module>
     <module>spring-aop-10-inter-type-declarations</module>
     <module>spring-core-null-safety</module>
+    <module>spring-core-work-with-resources</module>
   </modules>
 
   <properties>

spring-core-work-with-resources/pom.xml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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">
+  <parent>
+    <artifactId>spring-framework-tutorial-parent</artifactId>
+    <groupId>com.jstobigdata</groupId>
+    <version>1.0-SNAPSHOT</version>
+  </parent>
+  <modelVersion>4.0.0</modelVersion>
+
+  <artifactId>spring-core-work-with-resources</artifactId>
+  <description>Spring example to work with resources</description>
+
+  <dependencies>
+    <dependency>
+      <groupId>org.springframework</groupId>
+      <artifactId>spring-core</artifactId>
+    </dependency>
+
+    <dependency>
+      <groupId>org.springframework</groupId>
+      <artifactId>spring-context</artifactId>
+    </dependency>
+  </dependencies>
+
+  <dependencyManagement>
+    <dependencies>
+      <dependency>
+        <groupId>com.jstobigdata</groupId>
+        <artifactId>spring-tutorial-boms</artifactId>
+        <version>1.0-SNAPSHOT</version>
+        <type>pom</type>
+        <scope>import</scope>
+      </dependency>
+    </dependencies>
+  </dependencyManagement>
+
+</project>

spring-core-work-with-resources/src/main/java/c/jbd/spring/resources/DefaultResourceLoaderExample.java

@@ -0,0 +1,15 @@
+package c.jbd.spring.resources;
+
+import org.springframework.core.io.DefaultResourceLoader;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.ResourceLoader;
+
+import java.io.IOException;
+
+public class DefaultResourceLoaderExample {
+  public static void main(String[] args) throws IOException {
+    ResourceLoader resourceLoader = new DefaultResourceLoader();
+    Resource r = resourceLoader.getResource("sample.md");
+    ReaderUtil.readAndPrint(r.getInputStream());
+  }
+}

spring-core-work-with-resources/src/main/java/c/jbd/spring/resources/ReaderUtil.java

@@ -0,0 +1,17 @@
+package c.jbd.spring.resources;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+public class ReaderUtil {
+  public static void readAndPrint(InputStream stream) throws IOException {
+    int content = stream.read();
+    System.out.println("\n============ start ===========");
+    while (content != -1) {
+      System.out.print((char) content);
+      content = stream.read();
+    }
+    System.out.println("\n============ End ============");
+    stream.close();
+  }
+}

spring-core-work-with-resources/src/main/java/c/jbd/spring/resources/ResourcesExample.java

@@ -0,0 +1,23 @@
+package c.jbd.spring.resources;
+
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.UrlResource;
+
+import java.io.IOException;
+
+public class ResourcesExample {
+  public static void main(String[] args) throws IOException {
+    Resource urlResource
+      = new UrlResource("https://google.com");
+    ReaderUtil.readAndPrint(urlResource.getInputStream());
+
+    Resource classPathResource = new ClassPathResource("sample.md");
+    ReaderUtil.readAndPrint(classPathResource.getInputStream());
+
+    //FileSystemResource fileResource = new FileSystemResource("PathToFile/filename");
+    //readAndPrint(fileResource.getInputStream());
+  }
+
+
+}

spring-core-work-with-resources/src/main/java/c/jbd/spring/resources/loader/JbdResourceLoader.java

@@ -0,0 +1,23 @@
+package c.jbd.spring.resources.loader;
+
+import c.jbd.spring.resources.ReaderUtil;
+import org.springframework.context.ResourceLoaderAware;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.ResourceLoader;
+import org.springframework.stereotype.Component;
+
+import java.io.IOException;
+
+@Component("jbdResourceLoader")
+public class JbdResourceLoader implements ResourceLoaderAware {
+  private ResourceLoader resourceLoader;
+
+  public void setResourceLoader(ResourceLoader resourceLoader) {
+    this.resourceLoader = resourceLoader;
+  }
+
+  public void loadResource(String resourcePath) throws IOException {
+    Resource resource = resourceLoader.getResource(resourcePath);
+    ReaderUtil.readAndPrint(resource.getInputStream());
+  }
+}

spring-core-work-with-resources/src/main/java/c/jbd/spring/resources/loader/ResourceLoaderDemo.java

@@ -0,0 +1,16 @@
+package c.jbd.spring.resources.loader;
+
+import org.springframework.context.ApplicationContext;
+import org.springframework.context.annotation.AnnotationConfigApplicationContext;
+
+import java.io.IOException;
+
+public class ResourceLoaderDemo {
+  public static void main(String[] args) throws IOException {
+
+    ApplicationContext ctx = new AnnotationConfigApplicationContext(JbdResourceLoader.class);
+    JbdResourceLoader loader = (JbdResourceLoader) ctx.getBean("jbdResourceLoader");
+    loader.loadResource("classpath:sample.md");
+    System.out.println("*** Resource loader using classpath ***");
+  }
+}

spring-core-work-with-resources/src/main/resources/ex-config.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<beans xmlns="http://www.springframework.org/schema/beans"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:schemaLocation="http://www.springframework.org/schema/beans
+       http://www.springframework.org/schema/beans/spring-beans.xsd">
+
+  <bean id="item">
+    <property name="id" value="#{ T(java.util.UUID).randomUUID().toString() }"/>
+  </bean>
+</beans>

spring-core-work-with-resources/src/main/resources/sample.md

@@ -0,0 +1 @@
+## This is a Sample Markdown file