JAVA-22236 | adding new submodule due to too much articles in the same submodule. (#14286)

2023-06-22 16:53:01 +02:00
parent 18da9d53f7
commit a6052bde93
12 changed files with 74 additions and 19 deletions
@@ -0,0 +1,20 @@
+package com.baeldung.envvariables;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.stereotype.Component;
+
+@Component
+@ConfigurationProperties(prefix = "baeldung")
+public class BaeldungProperties {
+
+    private String presentation;
+
+    public String getPresentation() {
+        return presentation;
+    }
+
+    public void setPresentation(String presentation) {
+        this.presentation = presentation;
+    }
+
+}
@@ -0,0 +1,60 @@
+package com.baeldung.envvariables;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.core.env.Environment;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class MyController {
+
+    @Value("${environment.name}")
+    private String environmentName;
+
+    @Value("${java.home.and.environment}")
+    private String javaHomeAndEnvironmentName;
+
+    @Value("${thispropertydoesnotexist}")
+    private String nonExistentProperty;
+
+    @Value("${baeldung.presentation}")
+    private String baeldungPresentation;
+
+    @Autowired
+    private Environment environment;
+
+    @Autowired
+    private BaeldungProperties baeldungProperties;
+
+    @GetMapping("/environment_name")
+    String getEnvironmentName_FromEnvironmentVariables() {
+        return environmentName;
+    }
+
+    @GetMapping("/java_home_and_environment")
+    String getJavaHomeAndEnvironmentName_FromEnvironmentVariables() {
+        return javaHomeAndEnvironmentName;
+    }
+
+    @GetMapping("non_existent_property")
+    String getNonexistentProperty_FromEnvironmentVariables() {
+        return nonExistentProperty;
+    }
+
+    @GetMapping("baeldung_presentation_from_value")
+    String getBaeldungPresentation_FromValue() {
+        return baeldungPresentation;
+    }
+
+    @GetMapping("baeldung_presentation_from_environment")
+    String getBaeldungPresentation_FromEnvironment() {
+        return environment.getProperty("baeldung.presentation");
+    }
+
+    @GetMapping("baeldung_configuration_properties")
+    String getBaeldungPresentation_FromConfigurationProperties() {
+        return baeldungProperties.getPresentation();
+    }
+
+}
@@ -0,0 +1,12 @@
+package com.baeldung.error;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class KebabCasingDemoApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(KebabCasingDemoApplication.class, args);
+    }
+
+}
@@ -0,0 +1,18 @@
+package com.baeldung.error.configuration;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ConfigurationProperties(prefix = "customProperties")
+public class MainConfiguration {
+    private String name;
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(final String name) {
+        this.name = name;
+    }
+}
@@ -0,0 +1,13 @@
+environment.name=${OS}
+java.home.and.environment=${JAVA_HOME}+${OS}
+not.existing.system.property=${thispropertydoesnotexist}
+baeldung.presentation=${HELLO_BAELDUNG}. Java is installed in the folder: ${JAVA_HOME}
+#---
+#camelCasing
+#customProperties.name="Baeldung"
+#PascalCasing
+#CustomProperties.name="Baeldung"
+#SnakingCasing
+#custom_properties.name="Baeldung"
+#KebabCasing
+custom-properties.name="Baeldung"
@@ -0,0 +1,36 @@
+package com.baeldung.envvariables;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.web.servlet.MockMvc;
+
+@SpringBootTest(classes = MyController.class)
+@AutoConfigureMockMvc
+public class MyControllerIntegrationTest {
+
+    @Autowired
+    private MockMvc mockMvc;
+
+    /** NB : these tests are commented out because they are environment dependent
+     * If you want to run one of them on your machine, follow the instruction above it
+     *
+     * expects the value of your system environment property 'OS' (it is already defined at least in Windows_NT)
+     @Test void givenExistingSystemProperty_whenInjected_thenHasSystemPropertyValue() throws Exception {
+     mockMvc.perform(get("/environment_name"))
+     .andExpect(content().string(equalTo("Windows_NT")));
+     }
+    
+      * expects the value of the JAVA_HOME environment variable (you need to define it if you haven't yet), with a + and the 'OS' environment property in the end
+     @Test void givenCombinationOfSystemPropertyAndEnvironmentVariable_whenInjected_thenHasExpectedValue() throws Exception {
+     mockMvc.perform(get("/java_home_and_environment"))
+     .andExpect(content().string(equalTo("C:\\Program Files\\Java\\jdk-11.0.14+Windows_NT")));
+     }
+    
+      * expects the content to be ${thispropertydoesnotexist} ; if you have defined an environment property called thispropertydoesnotexist, it would fail
+     @Test void givenNonExistentProperty_whenInjected_thenKeepsTheStringValue() throws Exception {
+     mockMvc.perform(get("/non_existent_property"))
+     .andExpect(content().string(equalTo("${thispropertydoesnotexist}")));
+     }
+     */
+}