iSharkFly-Docs/java-tutorials
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[BAEL-19675] - Move articles out of jackson part 2

Browse Source
This commit is contained in:
catalin-burcea
2019-11-26 12:28:18 +02:00
parent 9f25b72ca4
commit 3d35439fb5
119 changed files with 1087 additions and 469 deletions
Download Patch File Download Diff File Expand all files Collapse all files
jackson-2/src/main/java/com/baeldung/jackson/csv/JsonCsvConverter.java
-59
View File
@@ -1,59 +0,0 @@
package com.baeldung.jackson.csv;
import java.io.File;
import java.io.IOException;
import com.baeldung.jackson.entities.OrderLine;
import com.baeldung.jackson.mixin.OrderLineForCsv;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.MappingIterator;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.dataformat.csv.CsvMapper;
import com.fasterxml.jackson.dataformat.csv.CsvSchema;
import com.fasterxml.jackson.dataformat.csv.CsvSchema.Builder;
public class JsonCsvConverter {
public static void JsonToCsv(File jsonFile, File csvFile) throws IOException {
JsonNode jsonTree = new ObjectMapper().readTree(jsonFile);
Builder csvSchemaBuilder = CsvSchema.builder();
JsonNode firstObject = jsonTree.elements().next();
firstObject.fieldNames().forEachRemaining(fieldName -> {csvSchemaBuilder.addColumn(fieldName);} );
CsvSchema csvSchema = csvSchemaBuilder
.build()
.withHeader();
CsvMapper csvMapper = new CsvMapper();
csvMapper.writerFor(JsonNode.class)
.with(csvSchema)
.writeValue(csvFile, jsonTree);
}
public static void csvToJson(File csvFile, File jsonFile) throws IOException {
CsvSchema orderLineSchema = CsvSchema.emptySchema().withHeader();
CsvMapper csvMapper = new CsvMapper();
MappingIterator<OrderLine> orderLines = csvMapper.readerFor(OrderLine.class)
.with(orderLineSchema)
.readValues(csvFile);
new ObjectMapper()
.configure(SerializationFeature.INDENT_OUTPUT, true)
.writeValue(jsonFile, orderLines.readAll());
}
public static void JsonToFormattedCsv(File jsonFile, File csvFile) throws IOException {
CsvMapper csvMapper = new CsvMapper();
CsvSchema csvSchema = csvMapper
.schemaFor(OrderLineForCsv.class)
.withHeader();
csvMapper.addMixIn(OrderLine.class, OrderLineForCsv.class);
OrderLine[] orderLines = new ObjectMapper()
.readValue(jsonFile, OrderLine[].class);
csvMapper.writerFor(OrderLine[].class)
.with(csvSchema)
.writeValue(csvFile, orderLines);
}
}
jackson-2/src/main/java/com/baeldung/jackson/entities/Order.java
-68
View File
@@ -1,68 +0,0 @@
package com.baeldung.jackson.entities;
import java.time.LocalDate;
import java.util.ArrayList;
import java.util.List;
public class Order {
private String orderNo;
private LocalDate date;
private String customerName;
private List<OrderLine> orderLines;
public Order() {
}
public Order(String orderNo, LocalDate date, String customerName, List<OrderLine> orderLines) {
super();
this.orderNo = orderNo;
this.date = date;
this.customerName = customerName;
this.orderLines = orderLines;
}
public String getOrderNo() {
return orderNo;
}
public void setOrderNo(String orderNo) {
this.orderNo = orderNo;
}
public LocalDate getDate() {
return date;
}
public void setDate(LocalDate date) {
this.date = date;
}
public String getCustomerName() {
return customerName;
}
public void setCustomerName(String customerName) {
this.customerName = customerName;
}
public List<OrderLine> getOrderLines() {
if (orderLines == null) {
orderLines = new ArrayList<>();
}
return orderLines;
}
public void setOrderLines(List<OrderLine> orderLines) {
if (orderLines == null) {
orderLines = new ArrayList<>();
}
this.orderLines = orderLines;
}
@Override
public String toString() {
return "Order [orderNo=" + orderNo + ", date=" + date + ", customerName=" + customerName + ", orderLines=" + orderLines + "]";
}
}
jackson-2/src/main/java/com/baeldung/jackson/entities/OrderLine.java
-49
View File
@@ -1,49 +0,0 @@
package com.baeldung.jackson.entities;
import java.math.BigDecimal;
public class OrderLine {
private String item;
private int quantity;
private BigDecimal unitPrice;
public OrderLine() {
}
public OrderLine(String item, int quantity, BigDecimal unitPrice) {
super();
this.item = item;
this.quantity = quantity;
this.unitPrice = unitPrice;
}
public String getItem() {
return item;
}
public void setItem(String item) {
this.item = item;
}
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
public BigDecimal getUnitPrice() {
return unitPrice;
}
public void setUnitPrice(BigDecimal unitPrice) {
this.unitPrice = unitPrice;
}
@Override
public String toString() {
return "OrderLine [item=" + item + ", quantity=" + quantity + ", unitPrice=" + unitPrice + "]";
}
}
jackson-2/src/main/java/com/baeldung/jackson/entities/Weather.java
-44
View File
@@ -1,44 +0,0 @@
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/java/com/baeldung/jackson/mixin/OrderLineForCsv.java
-25
View File
@@ -1,25 +0,0 @@
package com.baeldung.jackson.mixin;
import java.math.BigDecimal;
import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.annotation.JsonPropertyOrder;
@JsonPropertyOrder({
"count",
"name"
})
public abstract class OrderLineForCsv {
@JsonProperty("name")
private String item;
@JsonProperty("count")
private int quantity;
@JsonIgnore
private BigDecimal unitPrice;
}
jackson-2/src/main/resources/orderInput.yaml
-11
View File
@@ -1,11 +0,0 @@
orderNo: A001
date: 2019-04-17
customerName: Customer, Joe
orderLines:
- item: No. 9 Sprockets
quantity: 12
unitPrice: 1.23
- item: Widget (10mm)
quantity: 4
unitPrice: 3.45
jackson-2/src/main/resources/orderLines.csv
-3
View File
@@ -1,3 +0,0 @@
item,quantity,unitPrice
"No. 9 Sprockets",12,1.23
"Widget (10mm)",4,3.45
1 item quantity unitPrice
2 No. 9 Sprockets 12 1.23
3 Widget (10mm) 4 3.45
jackson-2/src/main/resources/orderLines.json
-9
View File
@@ -1,9 +0,0 @@
[ {
"item" : "No. 9 Sprockets",
"quantity" : 12,
"unitPrice" : 1.23
}, {
"item" : "Widget (10mm)",
"quantity" : 4,
"unitPrice" : 3.45
} ]
jackson-2/src/test/java/com/baeldung/jackson/csv/CsvUnitTest.java
-54
View File
@@ -1,54 +0,0 @@
package com.baeldung.jackson.csv;
import static org.junit.Assert.assertEquals;
import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.List;
import org.junit.Test;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.google.common.io.Files;
public class CsvUnitTest {
@Test
public void givenJsonInput_thenWriteCsv() throws JsonParseException, JsonMappingException, IOException {
JsonCsvConverter.JsonToCsv(new File("src/main/resources/orderLines.json"),
new File("src/main/resources/csvFromJson.csv"));
assertEquals(readFile("src/main/resources/csvFromJson.csv"),
readFile("src/test/resources/expectedCsvFromJson.csv"));
}
@Test
public void givenCsvInput_thenWritesJson() throws JsonParseException, JsonMappingException, IOException {
JsonCsvConverter.csvToJson(new File("src/main/resources/orderLines.csv"),
new File("src/main/resources/jsonFromCsv.json"));
assertEquals(readFile("src/main/resources/jsonFromCsv.json"),
readFile("src/test/resources/expectedJsonFromCsv.json"));
}
@Test
public void givenJsonInput_thenWriteFormattedCsvOutput() throws JsonParseException, JsonMappingException, IOException {
JsonCsvConverter.JsonToFormattedCsv(new File("src/main/resources/orderLines.json"),
new File("src/main/resources/formattedCsvFromJson.csv"));
assertEquals(readFile("src/main/resources/formattedCsvFromJson.csv"),
readFile("src/test/resources/expectedFormattedCsvFromJson.csv"));
}
private List<String> readFile(String filename) throws IOException {
return Files.readLines(new File(filename), Charset.forName("utf-8"));
}
}
;
jackson-2/src/test/java/com/baeldung/jackson/deserialization/jsonalias/JsonAliasUnitTest.java
-38
View File
@@ -1,38 +0,0 @@
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());
}
}
jackson-2/src/test/java/com/baeldung/jackson/yaml/YamlUnitTest.java
-63
View File
@@ -1,63 +0,0 @@
package com.baeldung.jackson.yaml;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.File;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.RoundingMode;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.List;
import org.junit.Before;
import org.junit.Test;
import com.baeldung.jackson.entities.Order;
import com.baeldung.jackson.entities.OrderLine;
import com.fasterxml.jackson.core.JsonGenerationException;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
import com.fasterxml.jackson.dataformat.yaml.YAMLGenerator.Feature;
public class YamlUnitTest {
private ObjectMapper mapper;
@Before
public void setup() {
mapper = new ObjectMapper(new YAMLFactory().disable(Feature.WRITE_DOC_START_MARKER));
mapper.findAndRegisterModules();
mapper.disable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
}
@Test
public void givenYamlInput_ObjectCreated() throws JsonParseException, JsonMappingException, IOException {
Order order = mapper.readValue(new File("src/main/resources/orderInput.yaml"), Order.class);
assertEquals("A001", order.getOrderNo());
assertEquals(LocalDate.parse("2019-04-17", DateTimeFormatter.ISO_DATE), order.getDate());
assertEquals("Customer, Joe", order.getCustomerName());
assertEquals(2, order.getOrderLines()
.size());
}
@Test
public void givenYamlObject_FileWritten() throws JsonGenerationException, JsonMappingException, IOException {
List<OrderLine> lines = new ArrayList<>();
lines.add(new OrderLine("Copper Wire (200ft)", 1, new BigDecimal(50.67).setScale(2, RoundingMode.HALF_UP)));
lines.add(new OrderLine("Washers (1/4\")", 24, new BigDecimal(.15).setScale(2, RoundingMode.HALF_UP)));
Order order = new Order(
"B-9910",
LocalDate.parse("2019-04-18", DateTimeFormatter.ISO_DATE),
"Customer, Jane",
lines);
mapper.writeValue(new File("src/main/resources/orderOutput.yaml"), order);
File outputYaml = new File("src/main/resources/orderOutput.yaml");
assertTrue(outputYaml.exists());
}
}
jackson-2/src/test/resources/expectedCsvFromJson.csv
-3
View File
@@ -1,3 +0,0 @@
item,quantity,unitPrice
"No. 9 Sprockets",12,1.23
"Widget (10mm)",4,3.45
1 item quantity unitPrice
2 No. 9 Sprockets 12 1.23
3 Widget (10mm) 4 3.45
jackson-2/src/test/resources/expectedFormattedCsvFromJson.csv
-3
View File
@@ -1,3 +0,0 @@
count,name
12,"No. 9 Sprockets"
4,"Widget (10mm)"
1 count name
2 12 No. 9 Sprockets
3 4 Widget (10mm)
jackson-2/src/test/resources/expectedJsonFromCsv.json
-9
View File
@@ -1,9 +0,0 @@
[ {
"item" : "No. 9 Sprockets",
"quantity" : 12,
"unitPrice" : 1.23
}, {
"item" : "Widget (10mm)",
"quantity" : 4,
"unitPrice" : 3.45
} ]