core-java-collections-conversions 内容进行布局

2023-05-09 17:05:33 -04:00
parent 2c9bdbe6e0
commit 43097ff34b
37 changed files with 31 additions and 1085 deletions
@@ -2,6 +2,7 @@
 <project version="4">
  <component name="CompilerConfiguration">
    <annotationProcessing>
+      <profile default="true" name="Default" enabled="true" />
      <profile name="Maven default annotation processors profile" enabled="true">
        <sourceOutputDir name="target/generated-sources/annotations" />
        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
@@ -21,18 +22,22 @@
        <module name="spring-data-jpa-repo-2" />
        <module name="core-java-streams" />
        <module name="core-java-io" />
-        <module name="java-collections-conversions" />
        <module name="core-java-8-2" />
        <module name="discourse" />
        <module name="spring-data-redis" />
        <module name="core-java" />
        <module name="core-java-collections-list-2" />
        <module name="core-java-collections-list-3" />
+        <module name="core-java-collections-conversions-2" />
        <module name="core-java-8" />
        <module name="core-java-collections-3" />
        <module name="core-java-collections-2" />
      </profile>
    </annotationProcessing>
+    <bytecodeTargetLevel>
+      <module name="java-collections-conversions" target="11" />
+      <module name="java-collections-conversions-2" target="11" />
+    </bytecodeTargetLevel>
  </component>
  <component name="JavacSettings">
    <option name="ADDITIONAL_OPTIONS_OVERRIDE">
@@ -13,6 +13,8 @@
    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-2/src/main/resources" charset="UTF-8" />
    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-3/src/main/java" charset="UTF-8" />
    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-3/src/main/resources" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-conversions-2/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-conversions-2/src/main/resources" charset="UTF-8" />
    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-conversions/src/main/java" charset="UTF-8" />
    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-conversions/src/main/resources" charset="UTF-8" />
    <file url="file://$PROJECT_DIR$/core-java-modules/core-java-collections-list-2/src/main/java" charset="UTF-8" />
@@ -0,0 +1,14 @@
+## Java 集合（Collections）相关文章和实例
+
+本模块中的内容包含有 Java 集合（Collections）和数组（arrays）中进行转换。
+
+### 相关文章
+
+- [Java Array 和 String 的转换](https://www.ossez.com/t/java-array-string/13685)
+- [Mapping Lists with ModelMapper](https://www.baeldung.com/java-modelmapper-lists)
+- [Converting List to Map With a Custom Supplier](https://www.baeldung.com/list-to-map-supplier)
+- [Arrays.asList vs new ArrayList(Arrays.asList())](https://www.baeldung.com/java-arrays-aslist-vs-new-arraylist)
+- [Iterate Over a Set in Java](https://www.baeldung.com/java-iterate-set)
+- [Convert a List of Integers to a List of Strings](https://www.baeldung.com/java-convert-list-integers-to-list-strings)
+- [Combining Two Lists Into a Map in Java](https://www.baeldung.com/java-combine-two-lists-into-map)
+- More articles: [[<-- prev]](../core-java-collections-conversions)
@@ -3,16 +3,16 @@
    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>java-collections-conversions-2</artifactId>
+    <artifactId>core-java-collections-conversions-2</artifactId>
    <version>0.1.0-SNAPSHOT</version>
-    <name>java-collections-conversions-2</name>
+    <name>core-java-collections-conversions-2</name>
    <packaging>jar</packaging>

    <parent>
-        <groupId>com.ossez</groupId>
-        <artifactId>parent-java</artifactId>
+        <groupId>com.ossez.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
        <version>0.0.2-SNAPSHOT</version>
-        <relativePath>../parent-java</relativePath>
+        <relativePath>../pom.xml</relativePath>
    </parent>

    <dependencies>
@@ -1,9 +1,10 @@
 ## Java 集合（Collections）相关文章和实例

-本模块中的内容包含有 Java 集合（Collections）转换相关的方法。
+本模块中的内容包含有 Java 集合（Collections）和数组（arrays）中进行转换。

 ### 相关文章
- [Converting between an Array and a List in Java](https://www.baeldung.com/convert-array-to-list-and-list-to-array)
+
+- [Java 如何在 Array 和 List 之间进行转换](https://www.ossez.com/t/java-array-list/14416)
 - [Converting Between an Array and a Set in Java](https://www.baeldung.com/convert-array-to-set-and-set-to-array)
 - [Java 把 Map 的值（Value）转换为 Array, List 或 Set](https://www.ossez.com/t/java-map-value-array-list-set/14388)
 - [Converting a List to String in Java](https://www.baeldung.com/java-list-to-string)
@@ -25,6 +25,7 @@
        <module>core-java-collections-2</module>
        <module>core-java-collections-3</module>
        <module>core-java-collections-conversions</module>
+        <module>core-java-collections-conversions-2</module>
        <module>core-java-collections-list</module>
        <module>core-java-collections-list-2</module>
        <module>core-java-collections-list-3</module>
@@ -1,12 +0,0 @@
-## Java Collections Cookbooks and Examples
-
-This module contains articles about conversions among Collection types and arrays in Java.
-
-### Relevant Articles: 
-
- [Java Array 和 String 的转换](https://www.ossez.com/t/java-array-string/13685)
- [Mapping Lists with ModelMapper](https://www.baeldung.com/java-modelmapper-lists)
- [Converting List to Map With a Custom Supplier](https://www.baeldung.com/list-to-map-supplier)
- [Java Arrays.asList 和 new ArrayList(Arrays.asList()) 的对比](https://www.ossez.com/t/java-arrays-aslist-new-arraylist-arrays-aslist/13680)
- [Iterate Over a Set in Java](https://www.baeldung.com/java-iterate-set)
- More articles: [[<-- prev]](../java-collections-conversions)
@@ -1,16 +0,0 @@
-## Java 集合模块和实例（Core Java）
-
-本模块中的内容包括有如何在 Java 的集合和数组（arrays）中进行转换。
-
-### 相关文章：
-
- [Java 如何在 Array 和 List 之间进行转换](https://www.ossez.com/t/java-array-list/14416)
- [Converting between an Array and a Set in Java](https://www.baeldung.com/convert-array-to-set-and-set-to-array)
- [Convert a Map to an Array, List or Set in Java](https://www.baeldung.com/convert-map-values-to-array-list-set)
- [Converting a List to String in Java](https://www.baeldung.com/java-list-to-string)
- [How to Convert List to Map in Java](https://www.baeldung.com/java-list-to-map)
- [Converting a Collection to ArrayList in Java](https://www.baeldung.com/java-convert-collection-arraylist)
- [Java 8 Collectors toMap](https://www.baeldung.com/java-collectors-tomap)
- [Converting Iterable to Collection in Java](https://www.baeldung.com/java-iterable-to-collection)
- [Converting Iterator to List](https://www.baeldung.com/java-convert-iterator-to-list)
- More articles: [[next -->]](../java-collections-conversions-2)
@@ -1,52 +0,0 @@
-<?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>java-collections-conversions</artifactId>
-    <version>0.1.0-SNAPSHOT</version>
-    <name>java-collections-conversions</name>
-    <packaging>jar</packaging>
-
-    <parent>
-        <groupId>com.ossez</groupId>
-        <artifactId>parent-java</artifactId>
-        <version>0.0.2-SNAPSHOT</version>
-        <relativePath>../parent-java</relativePath>
-    </parent>
-
-
-    <dependencies>
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-collections4</artifactId>
-            <version>${commons-collections4.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.commons</groupId>
-            <artifactId>commons-lang3</artifactId>
-            <version>${commons-lang3.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.assertj</groupId>
-            <artifactId>assertj-core</artifactId>
-            <version>${assertj.version}</version>
-            <scope>test</scope>
-        </dependency>
-    </dependencies>
-
-    <build>
-        <finalName>java-collections-conversions</finalName>
-        <resources>
-            <resource>
-                <directory>src/main/resources</directory>
-                <filtering>true</filtering>
-            </resource>
-        </resources>
-    </build>
-
-    <properties>
-        <commons-collections4.version>4.1</commons-collections4.version>
-    </properties>
-
-</project>
@@ -1,48 +0,0 @@
-package com.ossez.convertToMap;
-
-public class Book {
-    private String name;
-    private int releaseYear;
-    private String isbn;
-
-
-    @Override
-    public String toString() {
-        return "Book{" +
-                "name='" + name + '\'' +
-                ", releaseYear=" + releaseYear +
-                ", isbn='" + isbn + '\'' +
-                '}';
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public int getReleaseYear() {
-        return releaseYear;
-    }
-
-    public void setReleaseYear(int releaseYear) {
-        this.releaseYear = releaseYear;
-    }
-
-    public String getIsbn() {
-        return isbn;
-    }
-
-    public void setIsbn(String isbn) {
-        this.isbn = isbn;
-    }
-
-    public Book(String name, int releaseYear, String isbn) {
-        this.name = name;
-        this.releaseYear = releaseYear;
-        this.isbn = isbn;
-    }
-}
-
@@ -1,30 +0,0 @@
-package com.ossez.convertToMap;
-
-import java.util.*;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.function.Function;
-import java.util.stream.Collectors;
-
-public class ConvertToMap {
-    public Map<String, String> listToMap(List<Book> books) {
-        return books.stream().collect(Collectors.toMap(Book::getIsbn, Book::getName));
-    }
-
-    public Map<Integer, Book> listToMapWithDupKeyError(List<Book> books) {
-        return books.stream().collect(Collectors.toMap(Book::getReleaseYear, Function.identity()));
-    }
-
-    public Map<Integer, Book> listToMapWithDupKey(List<Book> books) {
-        return books.stream().collect(Collectors.toMap(Book::getReleaseYear, Function.identity(), (existing, replacement) -> existing));
-    }
-
-    public Map<Integer, Book> listToConcurrentMap(List<Book> books) {
-        return books.stream().collect(Collectors.toMap(Book::getReleaseYear, Function.identity(), (o1, o2) -> o1, ConcurrentHashMap::new));
-    }
-
-    public TreeMap<String, Book> listToSortedMap(List<Book> books) {
-        return books.stream()
-                .collect(Collectors.toMap(Book::getName, Function.identity(), (o1, o2) -> o1, TreeMap::new));
-    }
-}
-
@@ -1,52 +0,0 @@
-package com.ossez.convertcollectiontoarraylist;
-
-/**
- * This POJO is the element type of our collection. It has a deepCopy() method.
- *
- * @author chris
- */
-public class Foo {
-
-    private int id;
-    private String name;
-    private Foo parent;
-
-    public Foo() {
-    }
-
-    public Foo(int id, String name, Foo parent) {
-        this.id = id;
-        this.name = name;
-        this.parent = parent;
-    }
-
-    public int getId() {
-        return id;
-    }
-
-    public void setId(int id) {
-        this.id = id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-
-    public Foo getParent() {
-        return parent;
-    }
-
-    public void setParent(Foo parent) {
-        this.parent = parent;
-    }
-
-    public Foo deepCopy() {
-        return new Foo(
-          this.id, this.name, this.parent != null ? this.parent.deepCopy() : null);
-    }
-
-}
@@ -1,27 +0,0 @@
-package com.ossez.convertlisttomap;
-
-public class Animal {
-    private int id;
-    private String name;
-
-    public Animal(int id, String name) {
-        this.id = id;
-        this.setName(name);
-    }
-
-    public int getId() {
-        return id;
-    }
-
-    public void setId(int id) {
-        this.id = id;
-    }
-
-    public String getName() {
-        return name;
-    }
-
-    public void setName(String name) {
-        this.name = name;
-    }
-}
@@ -1,43 +0,0 @@
-package com.ossez.convertlisttomap;
-
-import com.google.common.collect.Maps;
-import org.apache.commons.collections4.MapUtils;
-
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.function.Function;
-import java.util.stream.Collectors;
-
-public class ConvertListToMapService {
-
-    public Map<Integer, Animal> convertListBeforeJava8(List<Animal> list) {
-
-        Map<Integer, Animal> map = new HashMap<>();
-
-        for (Animal animal : list) {
-            map.put(animal.getId(), animal);
-        }
-        return map;
-    }
-
-    public Map<Integer, Animal> convertListAfterJava8(List<Animal> list) {
-        Map<Integer, Animal> map = list.stream().collect(Collectors.toMap(Animal::getId, Function.identity()));
-        return map;
-    }
-
-    public Map<Integer, Animal> convertListWithGuava(List<Animal> list) {
-
-        Map<Integer, Animal> map = Maps.uniqueIndex(list, Animal::getId);
-        return map;
-    }
-
-    public Map<Integer, Animal> convertListWithApacheCommons(List<Animal> list) {
-
-        Map<Integer, Animal> map = new HashMap<>();
-
-        MapUtils.populateMap(map, list, Animal::getId);
-
-        return map;
-    }
-}
@@ -1,13 +0,0 @@
-<?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>
@@ -1,51 +0,0 @@
-package com.ossez.arrayconversion;
-
-import org.assertj.core.api.ListAssert;
-import org.hamcrest.CoreMatchers;
-import org.junit.Test;
-
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.List;
-
-import static org.assertj.core.api.Assertions.assertThat;
-
-/**
- * <p>
- * ArrayToListConversionUnitTest
- * <ul>
- * <li>@see <a href= "https://www.ossez.com/t/java-arrays-aslist-new-arraylist-arrays-aslist/13680">Arrays.asList vs new ArrayList(Arrays.asList())</a>
- * </li>
- * </ul>
- * </p>
- *
- * @author YuCheng
- */
-
- /*Line 1
- Line 2
- Line 3*/
-
-public class ArrayToListConversionUnitTest {
-
-    @Test(expected = UnsupportedOperationException.class)
-    public void givenAnArray_whenConvertingToList_returnUnmodifiableListUnitTest() {
-        String[] stringArray = new String[]{"A", "B", "C", "D"};
-        List<String> stringList = Arrays.asList(stringArray);
-        stringList.set(0, "E");
-        assertThat(stringList).containsExactly("E", "B", "C", "D");
-        assertThat(stringArray).containsExactly("E", "B", "C", "D");
-        stringList.add("F");
-    }
-
-    @Test
-    public void givenAnArray_whenConvertingToList_returnModifiableListUnitTest() {
-        String[] stringArray = new String[]{"A", "B", "C", "D"};
-        List<String> stringList = new ArrayList<>(Arrays.asList(stringArray));
-        stringList.set(0, "E");
-        assertThat(stringList).containsExactly("E", "B", "C", "D");
-        assertThat(stringArray).containsExactly("A", "B", "C", "D");
-        stringList.add("F");
-        assertThat(stringList).containsExactly("E", "B", "C", "D", "F");
-    }
-}
@@ -1,53 +0,0 @@
-package com.ossez.convertToMap;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.ConcurrentHashMap;
-
-import static org.junit.Assert.*;
-
-import org.junit.Before;
-import org.junit.Test;
-
-
-public class ConvertToMapUnitTest {
-
-    private List<Book> bookList;
-    private ConvertToMap convertToMap = new ConvertToMap();
-
-    @Before
-    public void init() {
-        bookList = new ArrayList<>();
-        bookList.add(new Book("The Fellowship of the Ring", 1954, "0395489318"));
-        bookList.add(new Book("The Two Towers", 1954, "0345339711"));
-        bookList.add(new Book("The Return of the King", 1955, "0618129111"));
-    }
-
-    @Test
-    public void whenConvertFromListToMap() {
-        assertTrue(convertToMap.listToMap(bookList).size() == 3);
-    }
-
-    @Test(expected = IllegalStateException.class)
-    public void whenMapHasDuplicateKey_without_merge_function_then_runtime_exception() {
-        convertToMap.listToMapWithDupKeyError(bookList);
-    }
-
-    @Test
-    public void whenMapHasDuplicateKeyThenMergeFunctionHandlesCollision() {
-        Map<Integer, Book> booksByYear = convertToMap.listToMapWithDupKey(bookList);
-        assertEquals(2, booksByYear.size());
-        assertEquals("0395489318", booksByYear.get(1954).getIsbn());
-    }
-
-    @Test
-    public void whenCreateConcurrentHashMap() {
-        assertTrue(convertToMap.listToConcurrentMap(bookList) instanceof ConcurrentHashMap);
-    }
-
-    @Test
-    public void whenMapisSorted() {
-        assertTrue(convertToMap.listToSortedMap(bookList).firstKey().equals("The Fellowship of the Ring"));
-    }
-}
@@ -1,145 +0,0 @@
-package com.ossez.convertcollectiontoarraylist;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Comparator;
-import java.util.HashSet;
-import java.util.Iterator;
-import static java.util.stream.Collectors.toCollection;
-import org.junit.BeforeClass;
-import org.junit.Test;
-import static org.junit.Assert.*;
-
-/**
- *
- * @author chris
- */
-public class CollectionToArrayListUnitTest {
-    private static Collection<Foo> srcCollection = new HashSet<>();
-
-    public CollectionToArrayListUnitTest() {
-    }
-    
-    @BeforeClass
-    public static void setUpClass() {
-        int i = 0;
-        Foo john = new Foo(i++, "John", null);
-        Foo mary = new Foo(i++, "Mary", null);
-        Foo sam = new Foo(i++, "Sam", john);
-        Foo alice = new Foo(i++, "Alice", john);
-        Foo buffy = new Foo(i++, "Buffy", sam);
-        srcCollection.add(john);
-        srcCollection.add(mary);
-        srcCollection.add(sam);
-        srcCollection.add(alice);
-        srcCollection.add(buffy);
-    }
-    
-    /**
-     * Section 3. Using the ArrayList Constructor
-     */
-    @Test
-    public void whenUsingConstructor_thenVerifyShallowCopy() {
-        ArrayList<Foo> newList = new ArrayList<>(srcCollection);
-        verifyShallowCopy(srcCollection, newList);
-    }
-    
-    /**
-     * Section 4. Using the Streams API
-     */
-    @Test
-    public void whenUsingStream_thenVerifyShallowCopy() {
-        ArrayList<Foo> newList = srcCollection.stream().collect(toCollection(ArrayList::new));
-
-        verifyShallowCopy(srcCollection, newList);
-    }
-
-    /**
-     * Section 5. Deep Copy
-     */
-    @Test
-    public void whenUsingDeepCopy_thenVerifyDeepCopy() {
-        ArrayList<Foo> newList = srcCollection.stream()
-          .map(Foo::deepCopy)
-          .collect(toCollection(ArrayList::new));
-
-        verifyDeepCopy(srcCollection, newList);
-    }
-    
-    /**
-     * Section 6. Controlling the List Order
-     */
-    @Test
-    public void whenUsingSortedStream_thenVerifySortOrder() {
-        ArrayList<Foo> newList = srcCollection.stream()
-          .sorted(Comparator.comparing(Foo::getName))
-          .collect(toCollection(ArrayList::new));
-
-        assertTrue("ArrayList is not sorted by name", isSorted(newList));
-    }
-    
-    /**
-     * Verify that the contents of the two collections are the same
-     * @param a
-     * @param b 
-     */
-    private void verifyShallowCopy(Collection<Foo> a, Collection<Foo> b) {
-        assertEquals("Collections have different lengths", a.size(), b.size());
-        Iterator<Foo> iterA = a.iterator();
-        Iterator<Foo> iterB = b.iterator();
-        while (iterA.hasNext()) {
-            // test instance identity
-            assertSame("Foo instances differ!", iterA.next(), iterB.next());
-        }
-    }
-    
-    /**
-     * Verify that the contents of the two collections are the same
-     * @param a
-     * @param b 
-     */
-    private void verifyDeepCopy(Collection<Foo> a, Collection<Foo> b) {
-        assertEquals("Collections have different lengths", a.size(), b.size());
-        Iterator<Foo> iterA = a.iterator();
-        Iterator<Foo> iterB = b.iterator();
-        while (iterA.hasNext()) {
-            Foo nextA = iterA.next();
-            Foo nextB = iterB.next();
-            // should not be same instance
-            assertNotSame("Foo instances are the same!", nextA, nextB);
-            // but should have same content
-            assertFalse("Foo instances have different content!", fooDiff(nextA, nextB));
-        }
-    }
-
-    /**
-     * Return true if the contents of a and b differ.  Test parent recursively
-     * @param a
-     * @param b
-     * @return False if the two items are the same
-     */
-    private boolean fooDiff(Foo a, Foo b) {
-        if (a != null && b != null) {
-            return a.getId() != b.getId() 
-              || !a.getName().equals(b.getName()) 
-              || fooDiff(a.getParent(), b.getParent());
-        }
-        return !(a == null && b == null);
-    }
-    
-    /**
-     * @param c collection of Foo
-     * @return true if the collection is sorted by name
-     */
-    private static boolean isSorted(Collection<Foo> c) {
-        String prevName = null;
-        for (Foo foo : c) {
-            if (prevName == null || foo.getName().compareTo(prevName) > 0) {
-                prevName = foo.getName();
-            } else {
-                return false;
-            }
-        }
-        return true;
-    }
-}
--- a/Show More
+++ b/Show More