>> converters) { converters.add(new ByteArrayHttpMessageConverter()); converters.add (new StringHttpMessageConverter()); converters.add(new ResourceHttpMessageConverter()); converters.add(new AllEncompassingFormHttpMessageConverter()); converters.add(new StringHttpMessageConverter ()); converters.add(longToStringConverter()); } /** * 将返回给前端的Long和long,统一转化成字符串 * *
>> converters) { //converters.removeIf(t -> t instanceof MappingJackson2HttpMessageConverter ); converters.clear(); StringHttpMessageConverter converter = new StringHttpMessageConverter ( Charset.forName("UTF-8")); converters.add(converter); converters.add
转换数据类型:citycode(列名称) data = pd.read_csv(self.file_path, encoding='utf-8', converters={'citycode ': str}) # data = pd.read_csv(self.file_path, encoding='gb2312', converters={'citycode': str}) else: # converters 转换数据类型:citycode(列名称) data = pd.read_excel(self.file_path , encoding='utf-8', converters={'citycode': str}) # data = pd.read_excel(self.file_path, encoding='gb2312', converters={'citycode': str}) # 有合并的单元格,填充 NaN 数据 data = data.fillna
= {} def register_converter(converter, type_name): REGISTERED_CONVERTERS[type_name] = converter () get_converters.cache_clear() 从上面我们可以非常分析的看到,django内置的路径转换器是先定义了一个类,类中定义了一个类属性regex作为正则表达式的值,然后定义了 2个方法to_python和to_url,最后定义了一个register_converter函数,将路径转换器注册到django中去 我们这里给他划分为5步: 1.创建一个converters.py, 小案例 接下来我们自己定义一个转换器,满足4位数字的路径匹配 新建一个converters.py文件,代码如下: class FourDigitYearConverter: # 定义正则表达式 # 注册自定义转换器 register_converter(converters.FourDigitYearConverter, 'yyyy') # yyyy是自定义转换器的类型名称 urlpatterns
>> converters) { super.configureMessageConverters(converters); /** * 1、定义一个 fastJson的配置信息,是否要格式化返回的Json数据; * 3、处理中文乱码 * 4、在convert中添加配置信息; * 5、将convert添加到converters 、在convert中添加配置信息; fastConverter.setFastJsonConfig(fastJsonConfig); // 5、将convert添加到converters 当中; converters.add(fastConverter); } Spring Boot 2.x配置模板 @Configuration public class WebMvcByFastjson >> converters) { converters.add(fastJsonHttpMessageConverter()); } }
converters = new Converters(); private final Map<ConverterCacheKey, GenericConverter> converterCache Converters是GenericConversionService的内部类,用于管理(添加、删除、查找)转换器们。 1、内部类Converters 它管理所有转换器,包括添加、删除、查找。 = null) { ... // 返回结果 } // 2、去converters里查找 converter = this.converters.find(sourceType, targetType > converters) { this.converters = converters; } @Override public void afterPropertiesSet() { /
>> converters) { // 将MappingJackson2HttpMessageConverter放到第一个 converters.removeIf(converter -> converter instanceof MappingJackson2HttpMessageConverter); converters.add(jackson2HttpMessageConverter ); Collections.reverse(converters); Integer byteConverterIdx = Steam.of(converters).findFirstIdx (c -> c instanceof ByteArrayHttpMessageConverter); converters.add(0, converters.get(byteConverterIdx
>> converters) { super.configureMessageConverters(converters); converters.add(new ByteArrayHttpMessageConverter ()); // ByteArrayHttpMessageConverter 必须加在前面,处理byte数据 converters.add(fastJsonConverter);// fastjsonConverter
converters = new Converters(); private final Map<ConverterCacheKey, GenericConverter> converterCache Converters是GenericConversionService的内部类,用于管理(添加、删除、查找)转换器们。 1、内部类Converters 它管理所有转换器,包括添加、删除、查找。 = null) { ... // 返回结果 } // 2、去converters里查找 converter = this.converters.find(sourceType, targetType > converters) { this.converters = converters; } @Override public void afterPropertiesSet() { /
converter : null); } converter = this.converters.find(sourceType, targetType); ,converters 对象为 GenericConversionService 的内部类。 private final Converters converters = new Converters(); private final Map<ConverterCacheKey, GenericConverter 在 getConverter() 中如果缓存 converterCache 中 不存在,则调用 Converters 对象的 find() 方法获取相应的 GenericConverter,如下: public ); invalidateCache(); } 直接调用内部类 Converters 的 add() 方法,如下: public void add(GenericConverter converter
(new Common.JsonConverter.NullableConverter<long>()); options.JsonSerializerOptions.Converters.Add (new Common.JsonConverter.NullableConverter<int>()); options.JsonSerializerOptions.Converters.Add (new Common.JsonConverter.NullableConverter<double>()); options.JsonSerializerOptions.Converters.Add (new Common.JsonConverter.NullableConverter<float>()); options.JsonSerializerOptions.Converters.Add (new Common.JsonConverter.NullableConverter<Guid>()); options.JsonSerializerOptions.Converters.Add
<type 'float'>, comments='#', delimiter=None, skip_header=0, skip_footer=0, converters # ndarray_data = numpy.genfromtxt(fname='data.txt', dtype=str,delimiter, skip_header, skip_footer, converters The converters can also be used to provide a default value for missing data: converters = {3: lambda - Override this value to receive unicode arrays and pass strings as input to converters 对于不含有中文的数据,dtype=str是可以的,如果含有中文,除了设置dtype=str以外,还要用converters做转码''' ndarry_1 = numpy.genfromtxt(fname
<mvc:annotation-driven> <mvc:message-converters> <bean class="com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter "/> </mvc:message-converters> </mvc:annotation-driven> 通常默认配置已经可以满足大部分使用场景,如果你想对它进行自定义配置的话, <property name="fastJsonConfig" ref="fastJsonConfig"/> </bean> </mvc:message-converters >> converters) { FastJsonHttpMessageConverter converter = new FastJsonHttpMessageConverter(); //converter.setFastJsonConfig(config); converters.add(converter); } } 在 Spring Data Redis
= _org.apache.jmeter.save.converters.IntegerPropertyConverter= _org.apache.jmeter.save.converters.LongPropertyConverter = _org.apache.jmeter.save.converters.MultiPropertyConverter=collection _org.apache.jmeter.save.converters.SampleEventConverter = _org.apache.jmeter.save.converters.SampleResultConverter=collection _org.apache.jmeter.save.converters.SampleSaveConfigurationConverter =collection _org.apache.jmeter.save.converters.StringPropertyConverter= _org.apache.jmeter.save.converters.HashTreeConverter =collection _org.apache.jmeter.save.converters.TestElementConverter=collection _org.apache.jmeter.save.converters.TestElementPropertyConverter
this.conversionService = createConversionService(); ConversionServiceFactory.registerConverters(this.converters createConversionService() 初始化 conversionService,然后调用 ConversionServiceFactory.registerConverters() 将定义的 converters > converters, ConverterRegistry registry) { if (converters ! = null) { for (Object converter : converters) { if (converter instanceof GenericConverter) { class="org.springframework.context.support.ConversionServiceFactoryBean"> <property name="<em>converters</em>
>> converters) { //1.需要定义一个convert转换消息的对象; FastJsonHttpMessageConverter fastJsonHttpMessageConverter fastMediaTypes); fastJsonHttpMessageConverter.setFastJsonConfig(fastJsonConfig); //5.将convert添加到converters converters.add(fastJsonHttpMessageConverter); } } 属性设置代码 @JSONField(format = "yyyy-MM-dd") >> converters) { //1.需要定义一个convert转换消息的对象; FastJsonHttpMessageConverter fastJsonHttpMessageConverter converters.add(fastJsonHttpMessageConverter); } }
//也就说对ConverterRegistry接口的实现最终是委托给它去完成的,它是整个转换服务正常work的内核 private final Converters converters = new Converters(); //它用两个成员变量来管理转换器们,其中converterCache是缓存用于加速查找,因此更为重要的便是Converters喽。 > targetType) { //可以看出是converters管理某个转换器的删除 this.converters.remove(sourceType, targetType); //清空缓存 > converters, ConverterRegistry registry) { if (converters ! > converters) { this.converters = converters; } //因为该类实现了InitializingBean接口,因此需要重写该方法,在bean
>> converters) { converters.add(new ByteArrayHttpMessageConverter()); } 更多的控制,可以重写extendMessageConverters >> converters) { converters.clear(); converters.add(new ByteArrayHttpMessageConverter()); } 分析
>> converters) { super.configureMessageConverters(converters); converters.add(responseBodyConverter StringHttpMessageConverter(StandardCharsets.UTF_8) } override fun configureMessageConverters( converters : MutableList<HttpMessageConverter<*>>) { super.configureMessageConverters(converters) converters.add(responseBodyConverter()) } override fun configureContentNegotiation(
>> converters) { converters.add(new MyConverter()); } } public class MyConverter implements >> converters) { converters.add(new MyConverter()); } } 怎么生效的呢?