Examples of org.springside.modules.mapper.JsonMapper

org.springside.modules.mapper.JsonMapper
简单封装Jackson，实现JSON String<->Java Object的Mapper. 封装不同的输出风格, 使用不同的builder函数创建实例. @author calvin

  @Test
  public void threeTypeInclusion() {
    TestBean bean = new TestBean("A");


    // 打印全部属性
    JsonMapper normalMapper = new JsonMapper();
    assertThat(normalMapper.toJson(bean)).isEqualTo(
        "{\"name\":\"A\",\"defaultValue\":\"hello\",\"nullValue\":null}");


    // 不打印nullValue属性
    JsonMapper nonEmptyMapper = JsonMapper.nonEmptyMapper();
    assertThat(nonEmptyMapper.toJson(bean)).isEqualTo("{\"name\":\"A\",\"defaultValue\":\"hello\"}");


    // 不打印默认值未改变的nullValue与defaultValue属性
    JsonMapper nonDefaultMaper = JsonMapper.nonDefaultMapper();
    assertThat(nonDefaultMaper.toJson(bean)).isEqualTo("{\"name\":\"A\"}");
  }

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  /*
   * 测试直接使用Jaxb的annotaion
   */
  @Test
  public void jaxbAnnoation() {
    JsonMapper newMapper = new JsonMapper();
    newMapper.enableJaxbAnnotation();
    TestBean3 testBean = new TestBean3(1, "foo", 18);
    // 结果name属性输出在前，且被改名为productName，且age属性被ignore
    assertThat(newMapper.toJson(testBean)).isEqualTo("{\"productName\":\"foo\",\"id\":1}");
  }

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    assertThat(mapper.fromJson("\"One\"", TestEnum.class)).isEqualTo(TestEnum.One);
    assertThat(mapper.fromJson("0", TestEnum.class)).isEqualTo(TestEnum.One);


    // 使用enum.toString(), 注意配置必須在所有讀寫動作之前調用.
    // 建议toString()使用index数字属性，比enum.name()节约了空间，比enum.order()则不会有顺序随时改变不确定的问题。
    JsonMapper newMapper = new JsonMapper();
    newMapper.enableEnumUseToString();
    assertThat(newMapper.toJson(TestEnum.One)).isEqualTo("\"1\"");
    assertThat(newMapper.fromJson("\"1\"", TestEnum.class)).isEqualTo(TestEnum.One);
  }

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   * 测试自定义转换器，整体感觉稍显复杂。这里是将Money和Long互转.
   */
  @Test
  public void customConverter() {


    JsonMapper newMapper = JsonMapper.nonEmptyMapper();


    SimpleModule moneyModule = new SimpleModule("MoneyModule");
    moneyModule.addSerializer(new MoneySerializer());
    moneyModule.addDeserializer(Money.class, new MoneyDeserializer());
    newMapper.getMapper().registerModule(moneyModule);


    // tojson
    User user = new User();
    user.setName("foo");
    user.setSalary(new Money(1.2));


    String jsonString = newMapper.toJson(user);


    assertThat(jsonString).isEqualTo("{\"name\":\"foo\",\"salary\":\"1.2\"}");


    // from
    User resultUser = newMapper.fromJson(jsonString, User.class);
    assertThat(resultUser.getSalary().value).isEqualTo(1.2);


  }

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  @Test
  public void customPropertyNaming() throws JsonMappingException {


    TestBean bean = new TestBean("foo");
    bean.setDefaultValue("bar");
    JsonMapper newMapper = JsonMapper.nonEmptyMapper();
    newMapper.getMapper().setPropertyNamingStrategy(new LowerCaseNaming());
    assertThat(newMapper.toJson(bean)).isEqualTo("{\"name\":\"foo\",\"defaultvalue\":\"bar\"}");
  }

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Related Classes of org.springside.modules.mapper.JsonMapper

com.fasterxml.jackson.databind.ObjectMapper

com.fasterxml.jackson.databind.util.JSONPObject

com.fasterxml.jackson.module.jaxb.JaxbAnnotationModule

org.springside.examples.showcase.demos.utilities.json.JsonDemo

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