需求
php调用java接口时，因为php那边的属性都是下划线风格，java这边的属性都是驼峰的风格。配置springmvc的json转换，在requestBody的时候（调用对象的set 方法）将java属性name映射成下划线形式 和 请求的参数匹配；在responseBody的时候（调用对象的get方法）将java的属性name也映射成下划线形式。
MappingJackson2HttpMessageConverter配置
<mvc:annotation-driven><mvc:message-converters><bean class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"><property name="objectMapper"><bean class="com.fasterxml.jackson.databind.ObjectMapper"><!-- 处理responseBody 里面日期类型 --><!-- <property name="dateFormat"><bean class="java.text.SimpleDateFormat"><constructor-arg type="java.lang.String" value="yyyy-MM-dd HH:mm:ss" /></bean></property> --><!-- 为null字段时不显示 --><property name="serializationInclusion"><value type="com.fasterxml.jackson.annotation.JsonInclude.Include">NON_NULL</value></property><property name="propertyNamingStrategy"><!--<bean class="com.xxx.serializer.MyPropertyNamingStrategyBase" />--><bean class="com.fasterxml.jackson.databind.PropertyNamingStrategy.LowerCaseWithUnderscoresStrategy" /></property></bean></property><property name="supportedMediaTypes"><list><value>text/html;charset=UTF-8</value><value>application/json; charset=UTF-8</value></list></property></bean></mvc:message-converters></mvc:annotation-driven>
自定义PropertyNamingStrategy
import com.fasterxml.jackson.databind.PropertyNamingStrategy; import com.fasterxml.jackson.databind.cfg.MapperConfig; import com.fasterxml.jackson.databind.introspect.AnnotatedField; import com.fasterxml.jackson.databind.introspect.AnnotatedMethod; import com.fasterxml.jackson.databind.introspect.AnnotatedParameter; import org.apache.commons.lang3.StringUtils;/*** Created by hujunzheng on 2017/6/7.*/ public class MyPropertyNamingStrategyBase extends PropertyNamingStrategy {@Overridepublic String nameForField(MapperConfig<?> config, AnnotatedField field, String defaultName) {return defaultName;}@Overridepublic String nameForGetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) {return underscoreName(defaultName);}@Overridepublic String nameForSetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) {return underscoreName(defaultName);}@Overridepublic String nameForConstructorParameter(MapperConfig<?> config, AnnotatedParameter ctorParam,String defaultName) {return defaultName;}private String underscoreName(String name) {if (StringUtils.isEmpty(name)) {return "";}StringBuilder result = new StringBuilder();result.append(name.substring(0, 1).toLowerCase());for (int i = 1; i < name.length(); ++i) {String s = name.substring(i, i + 1);String slc = s.toLowerCase();if (!(s.equals(slc))) {result.append("_").append(slc);} else {result.append(s);}}return result.toString();}private String withoutUnderscoreName(String name) {if (StringUtils.isEmpty(name)) {return "";}StringBuilder result = new StringBuilder();result.append(name.substring(0, 1).toLowerCase());boolean underscore = false;for (int i = 1; i < name.length(); ++i) {String s = name.substring(i, i + 1);if ("_".equals(s)) {underscore = true;continue;} else {if (underscore) s = s.toUpperCase();underscore = false;}result.append(s);}return result.toString();} }
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