如何使用SpringMVC的消息转换器设置日期格式

  /**
   * 扩展Spring MVC框架的消息转换器
   * @param converters
   */
  @Override
  protected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {
      log.info("扩展消息转换器...");
      //创建一个消息转换器对象
      MappingJackson2HttpMessageConverter converter = new MappingJackson2HttpMessageConverter();
      //需要为消息转换器对象设置一个对象转换器，对象转换器可以将Java对象序列化为JSON
      converter.setObjectMapper(new JacksonObjectMapper());
      //将自己的消息转换器加入到相关容器中，并设置优先级
      converters.add(0, converter);
  }

/**
 * 对象映射器:基于jackson将Java对象转为json，或者将json转为Java对象
 * 将JSON解析为Java对象的过程称为 [从JSON反序列化Java对象]
 * 从Java对象生成JSON的过程称为 [序列化Java对象到JSON]
 */
public class JacksonObjectMapper extends ObjectMapper {

    public static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";
    public static final String DEFAULT_DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm";
    public static final String DEFAULT_TIME_FORMAT = "HH:mm:ss";

    public JacksonObjectMapper() {
        super();
        //收到未知属性时不报异常
        this.configure(FAIL_ON_UNKNOWN_PROPERTIES, false);

        //反序列化时，属性不存在的兼容处理
        this.getDeserializationConfig().withoutFeatures(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);

        SimpleModule simpleModule = new SimpleModule()
                .addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)))
                .addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)))
                .addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)))
                .addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT)))
                .addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT)))
                .addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)));

        //注册功能模块 例如，可以添加自定义序列化器和反序列化器
        this.registerModule(simpleModule);
    }
}

<mvc:annotation-driven conversion-service="conversionService"/>
<!--声明自定义转换器-->
<bean class="org.springframework.web.bind.support.ConfigurableWebBindingInitializer" id="webBindingInitializer">
    <property name="conversionService" ref="conversionService"/>
</bean>

<!--添加自定义日期转换器-->
<bean class="org.springframework.format.support.FormattingConversionServiceFactoryBean" id="conversionService">
  <property name="converters">
      <list>
          <bean class="com.ssm.converter.DataConverter"></bean>
      </list>
  </property>
</bean>

public class DataConverter implements Converter<String, Date> {
    //要遍历的输入字符串格式
    private SimpleDateFormat[] simpleDateFormats={
            new SimpleDateFormat("yyyy-MM-dd"),
            new SimpleDateFormat("yyyy/MM/dd"),
            new SimpleDateFormat("yyyy.MM.dd"),
            new SimpleDateFormat("yyyyMMdd"),
            new SimpleDateFormat("yyyy年MM月dd号"),
            new SimpleDateFormat("yyyy年MM月dd日")
    };
    //日期转换的具体方法
    public Date convert(String source) {

        for (SimpleDateFormat simpleDateFormat : simpleDateFormats) {
            try {
                simpleDateFormat.setTimeZone(TimeZone.getTimeZone("GMT"));
                System.out.println(simpleDateFormat.parse(source));
                return  simpleDateFormat.parse(source);
            } catch (ParseException parseException) {
                //parseException.printStackTrace();直接进入下一个字符串格式
                continue;
            }
        }
        try {
            throw new ParseException("日期转换失败",0);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}