HandlerMethodArgumentResolver完美解决 springmvc注入参数多传报错

package com.qlkj.jgt.flow.app.resolver;import com.alibaba.fastjson.JSONObject;
import com.fqgj.jkzj.common.base.BaseSO;
import com.fqgj.jkzj.common.base.BaseVO;
import org.apache.commons.io.IOUtils;
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;/**
* @author vampire
* @date 2019/3/28 4:41 PM
*/
public class CustomArgumentResolver implements HandlerMethodArgumentResolver {
@Override
public boolean supportsParameter(MethodParameter methodParameter) {
Class paramObjClass = methodParameter.getParameterType();
//这里我定义的是如果入参为继承基类的时候就进入这个自定义参数解析方法中
if (BaseSO.class.isAssignableFrom(paramObjClass)) {
return true;
}
return false;
} @Override
public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer modelAndViewContainer, NativeWebRequest webRequest, WebDataBinderFactory webDataBinderFactory) throws Exception {
Class paramObjClass = parameter.getParameterType(); String json = getRequestBody(webRequest); Object paramObj = paramObjClass.newInstance();
Object object = JSONObject.parseObject(json, paramObjClass);
return object != null ? object : paramObj;
} private String getRequestBody(NativeWebRequest webRequest) {
HttpServletRequest servletRequest = webRequest.getNativeRequest(HttpServletRequest.class);
String jsonBody = (String) webRequest.getAttribute("params", NativeWebRequest.SCOPE_REQUEST);
if (jsonBody == null) {
try {
jsonBody = IOUtils.toString(servletRequest.getInputStream());
webRequest.setAttribute("params", jsonBody, NativeWebRequest.SCOPE_REQUEST);
} catch (IOException e) {
throw new RuntimeException(e);
}
} return jsonBody;
}}

<mvc:annotation-driven>
<mvc:argument-resolvers>
<bean class="com.qlkj.jgt.flow.app.resolver.CustomArgumentResolver"/>
</mvc:argument-resolvers>
</mvc:annotation-driven>