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 { @Override public String nameForField(MapperConfig<?> config, AnnotatedField field, String defaultName) { return defaultName; } @Override public String nameForGetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) { return underscoreName(defaultName); } @Override public String nameForSetterMethod(MapperConfig<?> config, AnnotatedMethod method, String defaultName) { return underscoreName(defaultName); } @Override public 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(); } }
