Bael 2434 (#6635)

* BAEL-2434

* BAEL-2434

* Minor alterations to reflect changes in the article

* Fixing Spel expression and removing extra code that is not referenced anymore in the article

* Moved the files from spring-core to spring-static-resources. Renamed ResourceUtil to ResourceReader.

* Changes due to change of article outline.

* Changes due to change of article outline.

* Removing Converter from article

spring-static-resources/pom.xml

@@ -140,6 +140,13 @@
             <artifactId>handlebars</artifactId>
             <version>${handlebars.version}</version>
         </dependency>
+
+        <!-- commons.io -->
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>${commons.io.version}</version>
+        </dependency>
         
         <dependency>
             <groupId>org.springframework</groupId>
@@ -208,6 +215,9 @@
 
         <!-- Maven plugins -->
         <yuicompressor-maven-plugin.version>1.5.1</yuicompressor-maven-plugin.version>
+
+        <!-- commons.io -->
+        <commons.io.version>2.5</commons.io.version>
     </properties>
 
 </project>

spring-static-resources/src/main/java/com/baeldung/loadresourceasstring/LoadResourceConfig.java

@@ -0,0 +1,15 @@
+package com.baeldung.loadresourceasstring;
+
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class LoadResourceConfig {
+
+    @Bean
+    public String resourceString() {
+        return ResourceReader.readFileToString("resource.txt");
+    }
+
+}

spring-static-resources/src/main/java/com/baeldung/loadresourceasstring/ResourceReader.java

@@ -0,0 +1,30 @@
+package com.baeldung.loadresourceasstring;
+
+import org.springframework.core.io.DefaultResourceLoader;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.ResourceLoader;
+import org.springframework.util.FileCopyUtils;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.io.UncheckedIOException;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+
+public class ResourceReader {
+
+    public static String readFileToString(String path) {
+        ResourceLoader resourceLoader = new DefaultResourceLoader();
+        Resource resource = resourceLoader.getResource(path);
+        return asString(resource);
+    }
+
+    public static String asString(Resource resource) {
+        try (Reader reader = new InputStreamReader(resource.getInputStream(), UTF_8)) {
+            return FileCopyUtils.copyToString(reader);
+        } catch (IOException e) {
+            throw new UncheckedIOException(e);
+        }
+    }
+}

spring-static-resources/src/main/resources/resource.txt

@@ -0,0 +1 @@
+This is a resource text file. This file will be loaded as a resource and use its contents as a string.

spring-static-resources/src/test/java/com/baeldung/loadresourceasstring/LoadResourceAsStringIntegrationTest.java

@@ -0,0 +1,57 @@
+package com.baeldung.loadresourceasstring;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.convert.converter.Converter;
+import org.springframework.core.io.DefaultResourceLoader;
+import org.springframework.core.io.Resource;
+import org.springframework.core.io.ResourceLoader;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.support.AnnotationConfigContextLoader;
+import org.springframework.util.FileCopyUtils;
+
+import java.io.InputStreamReader;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+import static org.junit.Assert.assertEquals;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(loader = AnnotationConfigContextLoader.class, classes = LoadResourceConfig.class)
+public class LoadResourceAsStringIntegrationTest {
+
+    private static final String EXPECTED_RESOURCE_VALUE = "This is a resource text file. This file will be loaded as a " + "resource and use its contents as a string.";
+
+    @Value("#{T(com.baeldung.loadresourceasstring.ResourceReader).readFileToString('classpath:resource.txt')}")
+    private String resourceStringUsingSpel;
+
+    @Autowired
+    @Qualifier("resourceString")
+    private String resourceString;
+
+    @Autowired
+    private ResourceLoader resourceLoader;
+
+    @Test
+    public void givenUsingResourceLoadAndFileCopyUtils_whenConvertingAResourceToAString_thenCorrect() {
+        Resource resource = resourceLoader.getResource("classpath:resource.txt");
+        assertEquals(EXPECTED_RESOURCE_VALUE, ResourceReader.asString(resource));
+    }
+
+    @Test
+    public void givenUsingResourceStringBean_whenConvertingAResourceToAString_thenCorrect() {
+        assertEquals(EXPECTED_RESOURCE_VALUE, resourceString);
+    }
+
+    @Test
+    public void givenUsingSpel_whenConvertingAResourceToAString_thenCorrect() {
+        assertEquals(EXPECTED_RESOURCE_VALUE, resourceStringUsingSpel);
+    }
+
+
+
+
+}