BAEL-2721 Moved JsonAliasUnitTest into new module called jackson-2. (#6555)

* BAEL-2721 Examples of @JsonAlias and Gson's alternate parameter

* BAEL-2721 Update class and method names for JsonAlias and GsonAlternate

* BAEL-2721 move JsonAliasUnitTest into new jackson-2 module

* BAEL-2721 Removed unused dependencies from pom.xml

* BAEL-2721 Tidy up logback.xml

* BAEL-2721 fix url in README.md

jackson-2/.gitignore

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+*.class
+
+#folders#
+/target
+/neoDb*
+/data
+/src/main/webapp/WEB-INF/classes
+*/META-INF/*
+
+# Packaged files #
+*.jar
+*.war
+*.ear

jackson-2/README.md

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+=========
+
+## Jackson Cookbooks and Examples
+
+###The Course
+The "REST With Spring" Classes: http://bit.ly/restwithspring
+
+### Relevant Articles: 
+- [Mapping Multiple JSON Fields to One Java Field](https://www.baeldung.com/json-multiple-fields-single-java-field)

jackson-2/pom.xml

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+<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>jackson-2</artifactId>
+    <version>0.1-SNAPSHOT</version>
+    <name>jackson-2</name>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+
+        <!-- marshalling -->
+
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+
+
+        <!-- test scoped -->
+
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>jackson-2</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+
+    <properties>
+
+        <!-- testing -->
+        <assertj.version>3.11.0</assertj.version>
+    </properties>
+
+</project>

jackson-2/src/main/java/com/baeldung/jackson/entities/Weather.java

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+package com.baeldung.jackson.entities;
+
+import com.fasterxml.jackson.annotation.JsonAlias;
+import com.fasterxml.jackson.annotation.JsonProperty;
+
+public class Weather {
+
+    @JsonProperty("location")
+    @JsonAlias("place")
+    private String location;
+
+    @JsonProperty("temp")
+    @JsonAlias("temperature")
+    private int temp;
+
+    @JsonProperty("outlook")
+    @JsonAlias("weather")
+    private String outlook;
+
+    public String getLocation() {
+        return location;
+    }
+
+    public void setLocation(String location) {
+        this.location = location;
+    }
+
+    public int getTemp() {
+        return temp;
+    }
+
+    public void setTemp(int temp) {
+        this.temp = temp;
+    }
+
+    public String getOutlook() {
+        return outlook;
+    }
+
+    public void setOutlook(String outlook) {
+        this.outlook = outlook;
+    }
+
+}

jackson-2/src/main/resources/logback.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

jackson-2/src/test/java/com/baeldung/jackson/deserialization/jsonalias/JsonAliasUnitTest.java

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+package com.baeldung.jackson.deserialization.jsonalias;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import com.baeldung.jackson.entities.Weather;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+public class JsonAliasUnitTest {
+
+    @Test
+    public void givenTwoJsonFormats_whenDeserialized_thenWeatherObjectsCreated() throws Exception {
+
+        ObjectMapper mapper = new ObjectMapper();
+
+        Weather weather = mapper.readValue("{" + 
+            "\"location\": \"London\"," + 
+            "\"temp\": 15," + 
+            "\"weather\": \"Cloudy\"" + 
+            "}", Weather.class);
+
+        assertEquals("London", weather.getLocation());
+        assertEquals("Cloudy", weather.getOutlook());
+        assertEquals(15, weather.getTemp());
+
+        weather = mapper.readValue("{" + 
+            "\"place\": \"Lisbon\"," + 
+            "\"temperature\": 35," + 
+            "\"outlook\": \"Sunny\"" + 
+            "}", Weather.class);
+
+        assertEquals("Lisbon", weather.getLocation());
+        assertEquals("Sunny", weather.getOutlook());
+        assertEquals(35, weather.getTemp());
+
+    }
+}