由于之前用@RequestParam無(wú)法接收request payload 正文格式為json格式的字符串，只能使用@RequestBody整個(gè)接收，覺(jué)得麻煩，但是spring自帶的參數(shù)解析器不具有這種功能，只能嘗試著用自定義參數(shù)解析器去解決。自定義解析器需要實(shí)現(xiàn)HandlerMethodArgumentResolver接口，HandlerMethodArgumentResolver接口包含兩個(gè)接口：這里寫圖片描述接口說(shuō)明： supportsParameter：用于判定是否需要處理該參數(shù)分解，返回true為需要，并會(huì)去調(diào)用下面的方法resolveArgument。 resolveArgument：真正用于處理參數(shù)分解的方法，返回的Object就是controller方法上的形參對(duì)象。1、自定義注解package com.manqian.crm.resolver;import java.lang.annotation.ElementType; import java.lang.annotation.Retention; import java.lang.annotation.RetentionPolicy; import java.lang.annotation.Target;@Target(ElementType.PARAMETER) @Retention(RetentionPolicy.RUNTIME) public @interface JsonParam {String value();boolean required() default true;String defaultValue() default ""; }若不想自定義注解，可以直接在實(shí)現(xiàn)HandlerMethodArgumentResolver的supportsParameter直接返回true2、自定義參數(shù)解析器，實(shí)現(xiàn)HandlerMethodArgumentResolver接口package com.manqian.crm.resolver;import com.jayway.jsonpath.JsonPath; import com.jayway.jsonpath.PathNotFoundException; import com.manqian.crm.api.exception.ParamCheckException; import org.apache.commons.io.IOUtils; import org.springframework.context.annotation.Configuration; import org.springframework.core.MethodParameter; import org.springframework.web.bind.support.WebDataBinderFactory; import org.springframework.web.context.request.NativeWebRequest; import org.springframework.web.method.support.HandlerMethodArgumentResolver; import org.springframework.web.method.support.ModelAndViewContainer;import javax.servlet.http.HttpServletRequest; import java.io.IOException;public class JsonPathArgumentResolver implements HandlerMethodArgumentResolver {private static final String JSON_REQUEST_BODY = "JSON_REQUEST_BODY";//判斷是否支持要轉(zhuǎn)換的參數(shù)類型@Overridepublic boolean supportsParameter(MethodParameter parameter) {return parameter.hasParameterAnnotation(JsonParam.class);}//當(dāng)支持后進(jìn)行相應(yīng)的轉(zhuǎn)換@Overridepublic Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer, NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {String body = getRequestBody(webRequest);Object val = null;try {val = JsonPath.read(body, parameter.getParameterAnnotation(JsonParam.class).value());if (parameter.getParameterAnnotation(JsonParam.class).required() && val == null) {throw new ParamCheckException(parameter.getParameterAnnotation(JsonParam.class).value() + "不能為空");}} catch (PathNotFoundException exception) {System.out.println(exception.getStackTrace());if (parameter.getParameterAnnotation(JsonParam.class).required()) { // ? ? ? ? ? ? ? ?throw new ParamCheckException(parameter.getParameterAnnotation(JsonParam.class).value() + "不能為空");throw exception;}}return val;}private String getRequestBody(NativeWebRequest webRequest) {HttpServletRequest servletRequest = webRequest.getNativeRequest(HttpServletRequest.class);String jsonBody = (String) servletRequest.getAttribute(JSON_REQUEST_BODY);if (jsonBody == null) {try {jsonBody = IOUtils.toString(servletRequest.getInputStream());servletRequest.setAttribute(JSON_REQUEST_BODY, jsonBody);} catch (IOException e) {throw new RuntimeException(e);}}return jsonBody;}}3、注冊(cè)自定義參數(shù)解析器 springboot方式： 1、package com.demo;import java.util.List;import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.web.method.support.HandlerMethodArgumentResolver; import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;import com.demo.mvc.component.MultiPersonArgumentResolver; import com.demo.mvc.component.PersonArgumentResolver;@SpringBootApplication public class WebMvcConfiguration extends WebMvcConfigurationSupport {@Overrideprotected void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {// 注冊(cè)JsonPathArgumentResolver的參數(shù)分解器argumentResolvers.add(new JsonPathArgumentResolver());} }2、package com.manqian.crm.resolver;import org.springframework.context.annotation.Configuration; import org.springframework.web.method.support.HandlerMethodArgumentResolver; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;import java.util.List;@Configuration public class ClientResourcesConfig extends WebMvcConfigurerAdapter {@Overridepublic void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) { // ? ? ? ?super.addArgumentResolvers(argumentResolvers);argumentResolvers.add(new JsonPathArgumentResolver());} }傳統(tǒng)XML格式： 1、<mvc:annotation-driven><mvc:argument-resolvers><bean class="com.manqian.crm.resolver.JsonPathArgumentResolver"/></mvc:argument-resolvers> </mvc:annotation-driven>2、<bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"><property name="jsonPathArgumentResolver"><bean class="com.manqian.crm.resolver.JsonPathArgumentResolver"/></property> </bean>

使用：
1、依賴：

com.jayway.jsonpath
json-path
2、controller方法使用@JsonParam接收參數(shù)
這里寫圖片描述

參考：https://stackoverflow.com/questions/12893566/passing-multiple-variables-in-requestbody-to-a-spring-mvc-controller-using-ajax/12897632#12897632

https://my.oschina.net/sugarZone/blog/704575

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