2021-08-05

jackson/build.gradle.kts

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+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+plugins {
+    id("elex-java")
+}
+
+dependencies {
+    implementation ("com.fasterxml.jackson.core:jackson-databind:2.12.1")
+
+    implementation ("com.fasterxml.jackson.dataformat:jackson-dataformat-xml:2.12.1")
+    implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-csv:2.12.1")
+    implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.12.1")
+}

jackson/logback.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Examples for Java
+  ~
+  ~ Copyright (c) 2021. Elex. All Rights Reserved.
+  ~ https://www.elex-project.com/
+  -->
+
+<configuration>
+
+	<appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+		<encoder>
+			<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+		</encoder>
+	</appender>
+
+	<root level="TRACE">
+		<appender-ref ref="CONSOLE" />
+	</root>
+</configuration>

jackson/src/main/java/kr/pe/elex/examples/Person.java

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+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.annotation.JsonPropertyOrder;
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@JsonPropertyOrder({"name", "age", "male"})
+public class Person {
+	@JsonProperty
+	private String name;
+	@JsonProperty
+	private int age;
+	@JsonProperty
+	private boolean male;
+}

jackson/src/main/java/kr/pe/elex/examples/package-info.java

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+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;

jackson/src/test/java/kr/pe/elex/examples/JacksonCsvTest.java

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+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;
+
+import com.fasterxml.jackson.databind.MappingIterator;
+import com.fasterxml.jackson.dataformat.csv.CsvMapper;
+import com.fasterxml.jackson.dataformat.csv.CsvSchema;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+class JacksonCsvTest {
+	private static List<Person> list;
+
+	@BeforeAll
+	private static void beforeAll() {
+		list = new ArrayList<>();
+		list.add(new Person("Charlie", 11, true));
+		list.add(new Person("Steve", 34, true));
+		list.add(new Person("Jane", 22, false));
+	}
+
+	@Test
+	void writeToCsv() throws IOException {
+		CsvMapper mapper = new CsvMapper();
+		CsvSchema schema = mapper
+				.schemaFor(Person.class)
+				.withHeader();
+
+		//String csvOut = mapper.writer(schema).writeValueAsString(list);
+		//System.out.println(csvOut);
+
+		mapper.writer(schema)
+				.writeValue(new File("test.csv"), list);
+	}
+
+	@Test
+	void readFromCsv() throws IOException {
+		CsvMapper mapper = new CsvMapper();
+		CsvSchema schema = mapper
+				.schemaFor(Person.class)
+				.withHeader();
+
+		MappingIterator<Person> iterator = mapper.readerFor(Person.class)
+				.with(schema)
+				.readValues(new File("test.csv"));
+		while(iterator.hasNext()){
+			System.out.println(iterator.next());
+		}
+
+	}
+}

jackson/src/test/java/kr/pe/elex/examples/JacksonXmlTest.java

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+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.dataformat.xml.XmlMapper;
+import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.io.IOException;
+
+class JacksonXmlTest {
+
+
+	@Test
+	void write() throws IOException {
+		XmlMapper mapper = XmlMapper.builder()
+				.defaultUseWrapper(false)
+				.enable(SerializationFeature.INDENT_OUTPUT)
+				.build();
+		mapper
+				.writeValue(new File("test.xml"), new Person("Charlie", 11, true));
+	}
+
+	@Test
+	void read() throws IOException {
+
+		ObjectMapper mapper = new XmlMapper();
+		Person person = mapper.readValue(new File("test.xml"), Person.class);
+
+		System.out.println(person);
+	}
+}

jackson/src/test/java/kr/pe/elex/examples/JacksonYamlTest.java

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+/*
+ * Examples for Java
+ *
+ * Copyright (c) 2021. Elex. All Rights Reserved.
+ * https://www.elex-project.com/
+ */
+
+package kr.pe.elex.examples;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
+import org.junit.jupiter.api.Test;
+
+import java.io.File;
+import java.io.IOException;
+
+class JacksonYamlTest {
+
+
+	@Test
+	void write() throws IOException {
+		ObjectMapper mapper = new ObjectMapper(new YAMLFactory());
+		mapper.writeValue(new File("test.yaml"), new Person("Charlie", 11, true));
+	}
+
+	@Test
+	void read() throws IOException {
+
+		ObjectMapper mapper = new ObjectMapper(new YAMLFactory());
+		Person person = mapper.readValue(new File("test.yaml"), Person.class);
+
+		System.out.println(person);
+	}
+}

jackson/test.csv

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+name,age,male
+Charlie,11,true
+Steve,34,true
+Jane,22,false

jackson/test.xml

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+<Person>
+  <name>Charlie</name>
+  <age>11</age>
+  <male>true</male>
+</Person>

jackson/test.yaml

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+---
+name: "Charlie"
+age: 11
+male: true