eugenp · lor6 · Aug 25, 2022 · Aug 19, 2022
diff --git a/libraries-files/pom.xml b/libraries-files/pom.xml
@@ -0,0 +1,48 @@
+<?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">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>libraries-files</artifactId>
+
+    <parent>
+        <artifactId>parent-modules</artifactId>
+        <groupId>com.baeldung</groupId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.ini4j</groupId>
+            <artifactId>ini4j</artifactId>
+            <version>${org.ini4j.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-configuration2</artifactId>
+            <version>${commons-configuration2}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-annotations</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-core</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+    </dependencies>
+
+    <properties>
+        <org.ini4j.version>0.5.4</org.ini4j.version>
+        <commons-configuration2>2.8.0</commons-configuration2>
+        <jackson.version>2.13.1</jackson.version>
+    </properties>
+
+</project>
diff --git a/libraries-files/src/main/java/com/baeldung/ini/CommonsParser.java b/libraries-files/src/main/java/com/baeldung/ini/CommonsParser.java
@@ -0,0 +1,45 @@
+package com.baeldung.ini;
+
+import org.apache.commons.configuration2.INIConfiguration;
+import org.apache.commons.configuration2.SubnodeConfiguration;
+import org.apache.commons.configuration2.ex.ConfigurationException;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.*;
+
+public class CommonsParser {
+    public static Map<String, Map<String, String>> parseIniFile(File fileToParse) throws IOException, ConfigurationException {
+        Map<String, Map<String, String>> iniFileContents = new HashMap<>();
+
+        INIConfiguration iniConfiguration = new INIConfiguration();
+        try (FileReader fileReader = new FileReader(fileToParse)) {
+            iniConfiguration.read(fileReader);
+        }
+
+        for (String section : iniConfiguration.getSections()) {
+            Map<String, String> subSectionMap = new HashMap<>();
+            SubnodeConfiguration confSection = iniConfiguration.getSection(section);
+            Iterator<String> keyIterator = confSection.getKeys();
+            while (keyIterator.hasNext()) {
+                String key = keyIterator.next();
+                String value = confSection.getProperty(key)
+                        .toString();
+                subSectionMap.put(key, value);
+            }
+            iniFileContents.put(section, subSectionMap);
+        }
+        return iniFileContents;
+    }
+
+    public static String readIniFileValue(File fileToParse, String section, String value) throws IOException, ConfigurationException {
+        INIConfiguration iniConfiguration = new INIConfiguration();
+        try (FileReader fileReader = new FileReader(fileToParse)) {
+            iniConfiguration.read(fileReader);
+        }
+
+        return iniConfiguration.getSection(section).getProperty(value).toString();
+    }
+}
diff --git a/libraries-files/src/main/java/com/baeldung/ini/Ini4JParser.java b/libraries-files/src/main/java/com/baeldung/ini/Ini4JParser.java
@@ -0,0 +1,23 @@
+package com.baeldung.ini;
+
+import org.ini4j.Ini;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.*;
+
+import static java.util.stream.Collectors.toMap;
+
+public class Ini4JParser {
+
+    public static Map<String, Map<String, String>> parseIniFile(File fileToParse) throws IOException {
+        Ini ini = new Ini(fileToParse);
+        return ini.entrySet().stream()
+                .collect(toMap(Map.Entry::getKey, Map.Entry::getValue));
+    }
+
+    public static String readIniFileValue(File fileToParse, String section, String key) throws IOException {
+        Ini ini = new Ini(fileToParse);
+        return ini.get(section, key);
+    }
+}
diff --git a/libraries-files/src/main/java/com/baeldung/ini/MyConfiguration.java b/libraries-files/src/main/java/com/baeldung/ini/MyConfiguration.java
@@ -0,0 +1,109 @@
+package com.baeldung.ini;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+
+public class MyConfiguration {
+
+    @JsonNaming(PropertyNamingStrategies.KebabCaseStrategy.class)
+    public static class Fonts {
+        private String letter;
+        private int textSize;
+
+        public String getLetter() {
+            return letter;
+        }
+
+        public void setLetter(String letter) {
+            this.letter = letter;
+        }
+
+        public int getTextSize() {
+            return textSize;
+        }
+
+        public void setTextSize(int textSize) {
+            this.textSize = textSize;
+        }
+    }
+
+    public static class Background {
+        private String color;
+
+        public String getColor() {
+            return color;
+        }
+
+        public void setColor(String color) {
+            this.color = color;
+        }
+    }
+
+    @JsonNaming(PropertyNamingStrategies.UpperCamelCaseStrategy.class)
+    public static class RequestResult {
+        private int requestCode;
+
+        public int getRequestCode() {
+            return requestCode;
+        }
+
+        public void setRequestCode(int requestCode) {
+            this.requestCode = requestCode;
+        }
+    }
+
+    @JsonNaming(PropertyNamingStrategies.UpperCamelCaseStrategy.class)
+    public static class ResponseResult {
+        private int resultCode;
+
+        public int getResultCode() {
+            return resultCode;
+        }
+
+        public void setResultCode(int resultCode) {
+            this.resultCode = resultCode;
+        }
+    }
+
+    private Fonts fonts;
+    private Background background;
+
+    @JsonProperty("RequestResult")
+    private RequestResult requestResult;
+
+    @JsonProperty("ResponseResult")
+    private ResponseResult responseResult;
+
+    public Fonts getFonts() {
+        return fonts;
+    }
+
+    public void setFonts(Fonts fonts) {
+        this.fonts = fonts;
+    }
+
+    public Background getBackground() {
+        return background;
+    }
+
+    public void setBackground(Background background) {
+        this.background = background;
+    }
+
+    public RequestResult getRequestResult() {
+        return requestResult;
+    }
+
+    public void setRequestResult(RequestResult requestResult) {
+        this.requestResult = requestResult;
+    }
+
+    public ResponseResult getResponseResult() {
+        return responseResult;
+    }
+
+    public void setResponseResult(ResponseResult responseResult) {
+        this.responseResult = responseResult;
+    }
+}
diff --git a/libraries-files/src/test/java/com/baeldung/ini/CommonsParserUnitTest.java b/libraries-files/src/test/java/com/baeldung/ini/CommonsParserUnitTest.java
@@ -0,0 +1,32 @@
+package com.baeldung.ini;
+
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.nio.file.Paths;
+import java.util.Map;
+
+import static com.baeldung.ini.CommonsParser.parseIniFile;
+import static com.baeldung.ini.CommonsParser.readIniFileValue;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class CommonsParserUnitTest {
+
+    private static final File TEST_FILE = Paths.get("src", "test", "resources", "sample.ini").toFile();
+
+    @Test
+    void givenIniFileThenCanParseWithIni4j() throws Exception {
+        Map<String, Map<String, String>> result =
+                parseIniFile(TEST_FILE);
+
+        assertThat(result.get("fonts"))
+                .containsEntry("letter", "bold")
+                .containsEntry("text-size", "28");
+    }
+
+    @Test
+    void givenIniFileThenCanReadKeyWithIni4j() throws Exception {
+        assertThat(readIniFileValue(TEST_FILE, "fonts", "letter"))
+                .isEqualTo("bold");
+    }
+}
diff --git a/libraries-files/src/test/java/com/baeldung/ini/Ini4JParserUnitTest.java b/libraries-files/src/test/java/com/baeldung/ini/Ini4JParserUnitTest.java
@@ -0,0 +1,32 @@
+package com.baeldung.ini;
+
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.nio.file.Paths;
+import java.util.Map;
+
+import static com.baeldung.ini.Ini4JParser.readIniFileValue;
+import static com.baeldung.ini.Ini4JParser.parseIniFile;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class Ini4JParserUnitTest {
+
+    private static final File TEST_FILE = Paths.get("src", "test", "resources", "sample.ini").toFile();
+
+    @Test
+    void givenIniFileThenCanParseWithIni4j() throws Exception {
+        Map<String, Map<String, String>> result =
+          parseIniFile(TEST_FILE);
+
+        assertThat(result.get("fonts"))
+          .containsEntry("letter", "bold")
+          .containsEntry("text-size", "28");
+    }
+
+    @Test
+    void givenIniFileThenCanReadKeyFromIt() throws Exception {
+        assertThat(readIniFileValue(TEST_FILE, "fonts", "letter"))
+                .isEqualTo("bold");
+    }
+}
diff --git a/libraries-files/src/test/java/com/baeldung/ini/SerializeIntoPojoUnitTest.java b/libraries-files/src/test/java/com/baeldung/ini/SerializeIntoPojoUnitTest.java
@@ -0,0 +1,31 @@
+package com.baeldung.ini;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.nio.file.Paths;
+import java.util.Map;
+
+import static com.baeldung.ini.Ini4JParser.parseIniFile;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class SerializeIntoPojoUnitTest {
+
+    private static final File TEST_FILE = Paths.get("src", "test", "resources", "sample.ini").toFile();
+
+    @Test
+    void givenAnIniFileThenCanLoadAsPojo() throws Exception {
+        ObjectMapper objectMapper = new ObjectMapper();
+
+        Map<String, Map<String, String>> iniKeys = parseIniFile(TEST_FILE);
+
+        MyConfiguration config = objectMapper.convertValue(iniKeys, MyConfiguration.class);
+
+        assertThat(config.getFonts().getLetter()).isEqualTo("bold");
+        assertThat(config.getFonts().getTextSize()).isEqualTo(28);
+        assertThat(config.getBackground().getColor()).isEqualTo("white");
+        assertThat(config.getRequestResult().getRequestCode()).isEqualTo(1);
+        assertThat(config.getResponseResult().getResultCode()).isZero();
+    }
+}
diff --git a/libraries-files/src/test/resources/sample.ini b/libraries-files/src/test/resources/sample.ini
@@ -0,0 +1,14 @@
+; for 16-bit app support
+
+[fonts]
+letter=bold
+text-size=28
+
+[background]
+color=white
+
+[RequestResult]
+RequestCode=1
+
+[ResponseResult]
+ResultCode=0