Merge remote-tracking branch 'origin/master'

Author: enjoyCoding666

pom.xml

@@ -13,7 +13,11 @@
             <artifactId>cglib</artifactId>
             <version>2.2.2</version>
         </dependency>
-
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.18.8</version>
+        </dependency>
     </dependencies>
 
     <build>

src/main/java/demo/invoice/Invoice.java

@@ -0,0 +1,35 @@
+package demo.invoice;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.math.BigDecimal;
+
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class Invoice {
+	private String invoiceNo;
+	private String invoiceCode;
+	private Integer invoiceType;
+
+	private BigDecimal invoiceAmount;
+	private BigDecimal taxAmount;
+	private BigDecimal totalAmount;
+
+	/**
+	 * 火车票的专属字段，是放在主类里面，还是单独拆分一个新的类好？
+	 */
+	private String trainNum;
+	private String passengerName;
+	/**
+	 * 飞机票专属字段。
+	 */
+	private String electronicTicketNum;
+	private String customerIdentityNum;
+
+
+}

src/main/java/demo/invoice/InvoiceAir.java

@@ -0,0 +1,25 @@
+package demo.invoice;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.math.BigDecimal;
+
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class InvoiceAir {
+	private String invoiceNo;
+	private String invoiceCode;
+	private Integer invoiceType;
+
+	private BigDecimal invoiceAmount;
+	private BigDecimal taxAmount;
+	private BigDecimal totalAmount;
+
+	private String electronicTicketNum;
+	private String customerIdentityNum;
+}

src/main/java/demo/invoice/InvoiceConstant.java

@@ -0,0 +1,9 @@
+package demo.invoice;
+
+public class InvoiceConstant {
+
+	public static final int INVOICE_TRAIN=8;
+
+	public static final int INVOICE_AIR=9;
+
+}

src/main/java/demo/invoice/InvoiceOperation.java

@@ -0,0 +1,37 @@
+package demo.invoice;
+
+public class InvoiceOperation {
+
+	/**
+	 * 计算发票类型。
+	 * 根据发票代码、发票号码计算得到发票类型。
+	 * @param invoiceNo
+	 * @param invoiceCode
+	 * @return
+	 */
+	public static int calculateInvoiceType(String invoiceNo,String invoiceCode){
+		int invoiceType=(int)(Math.random()*2+8);
+		System.out.println("发票类型为："+invoiceType);
+		return invoiceType;
+	}
+
+	/**
+	 * 根据不同的发票类型生成不同的发票服务
+	 * @param invoice
+	 */
+	public static void updateInvoice(Invoice invoice){
+		String invoiceNo=invoice.getInvoiceNo();
+		String invoiceCode=invoice.getInvoiceCode();
+		int invoiceType=calculateInvoiceType(invoiceNo,invoiceCode);
+		InvoiceService invoiceService;
+		if(invoiceType==InvoiceConstant.INVOICE_TRAIN) {
+			invoiceService=new InvoiceServiceAir();
+		}else if(invoiceType==InvoiceConstant.INVOICE_AIR){
+			invoiceService=new InvoiceServiceTrain();
+		}else {
+			invoiceService=new InvoiceServiceOther();
+		}
+		invoiceService.updateInvoice();
+	}
+
+}

src/main/java/demo/invoice/InvoicePatternTest.java

@@ -0,0 +1,14 @@
+package demo.invoice;
+
+/**
+ *
+ */
+public class InvoicePatternTest {
+	public static void main(String[] args) {
+		String invoiceNo="invoiceNo";
+		String invoiceCode="invoiceCode";
+		Invoice invoice=Invoice.builder().invoiceCode(invoiceCode).invoiceNo(invoiceNo).build();
+		InvoiceOperation.updateInvoice(invoice);
+	}
+
+}

src/main/java/demo/invoice/InvoiceService.java

@@ -0,0 +1,14 @@
+package demo.invoice;
+
+
+/**
+ * 变化的部分，使用接口实现。相同的部分，使用继承复用。
+ */
+public interface InvoiceService {
+	Invoice queryInvoice(Invoice invoice);
+
+	int saveInvoice();
+
+	int updateInvoice();
+
+}

src/main/java/demo/invoice/InvoiceServiceAir.java

@@ -0,0 +1,28 @@
+package demo.invoice;
+
+public class InvoiceServiceAir extends InvoiceOperation implements InvoiceService {
+
+	/**
+	 * 此处的参数类型，应该是Invoice还是InvoiceAir?
+	 * @param invoice
+	 * @return
+	 */
+	@Override
+	public Invoice queryInvoice(Invoice invoice) {
+		System.out.println("查询飞机票");
+		return null;
+	}
+
+	@Override
+	public int saveInvoice() {
+		System.out.println("保存飞机票");
+		return 0;
+	}
+
+	@Override
+	public int updateInvoice() {
+		System.out.println("更新飞机票");
+		return 0;
+	}
+
+}

src/main/java/demo/invoice/InvoiceServiceOther.java

@@ -0,0 +1,22 @@
+package demo.invoice;
+
+public class InvoiceServiceOther extends InvoiceOperation implements InvoiceService {
+	@Override
+	public Invoice queryInvoice(Invoice invoice) {
+		System.out.println("查询其他发票");
+		return null;
+	}
+
+	@Override
+	public int saveInvoice() {
+		System.out.println("保存其他发票");
+		return 0;
+	}
+
+	@Override
+	public int updateInvoice() {
+		System.out.println("更新其他发票");
+		return 0;
+	}
+
+}

src/main/java/demo/invoice/InvoiceServiceTrain.java

@@ -0,0 +1,22 @@
+package demo.invoice;
+
+public class InvoiceServiceTrain  extends InvoiceOperation implements InvoiceService {
+	@Override
+	public Invoice queryInvoice(Invoice invoice) {
+		System.out.println("查询火车票");
+		return null;
+	}
+
+	@Override
+	public int saveInvoice() {
+		System.out.println("保存火车票");
+		return 0;
+	}
+
+	@Override
+	public int updateInvoice() {
+		System.out.println("更新火车票");
+		return 0;
+	}
+
+}

src/main/java/demo/invoice/InvoiceTrain.java

@@ -0,0 +1,26 @@
+package demo.invoice;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.math.BigDecimal;
+
+
+@Data
+@Builder
+@AllArgsConstructor
+@NoArgsConstructor
+public class InvoiceTrain {
+	private String invoiceNo;
+	private String invoiceCode;
+	private Integer invoiceType;
+
+	private BigDecimal invoiceAmount;
+	private BigDecimal taxAmount;
+	private BigDecimal totalAmount;
+
+	private String trainNum;
+	private String passengerName;
+}