juplo.de Git - demos/noanno/blob - src/main/java/de/juplo/examples/jackson/SerializationExample.java

   1 package de.juplo.examples.jackson;
   2
   3 import com.fasterxml.jackson.annotation.JsonAutoDetect;
   4 import com.fasterxml.jackson.annotation.PropertyAccessor;
   5 import com.fasterxml.jackson.databind.ObjectMapper;
   6 import com.fasterxml.jackson.databind.SerializationFeature;
   7
   8 import java.util.Arrays;
   9 import java.util.HashMap;
  10 import java.util.Map;
  11
  12 public class SerializationExample {
  13
  14         public static void main(String[] args) throws Exception {
  15                 ObjectMapper mapper = new ObjectMapper();
  16                 mapper.setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY);
  17                 mapper.enable(SerializationFeature.INDENT_OUTPUT);
  18                 String str = mapper.writeValueAsString(new Bar());
  19                 System.out.println(str);
  20         }
  21
  22         static class Foo {
  23                 int i = 9;
  24                 String str = "Hallo Welt!";
  25                 Map<Integer, String> map =
  26                                 Arrays
  27                                                 .asList("A", "B", null, "c", "D")
  28                                                 .stream()
  29                                                 .collect(HashMap<Integer, String>::new, (m, v) -> m.put(m.size(), v), (m, m2) -> {});
  30         }
  31
  32         static class Bar {
  33                 int j = 42;
  34                 Foo foo = new Foo();
  35         }
  36 }