一、自定义参数解析

在使用Spring MVC传递List参数时直接自动映射出错如下

    @ResponseBody
    @PostMapping("/clarifySumitting")
    public String clarifySumitting(ArrayList<ClarifyIssue> clarifyIssues) {
        
        return "true";
    }

 

JQuery提交代码

function form_submitting(selections){
	//此处暂时禁用表格
	$table.bootstrapTable('showLoading');
	
	$.post('clarifySumitting',{"clarifyIssues":JSON.stringify(selections)},function(response){
		
	});
	
	//取消禁用
	$table.bootstrapTable('hideLoading');
}

　无法完成自动映射到Controller

采用自定义解析器配置完成自动映射

一、解析处理代码如下

package com.huaqin.workflow.handler;

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.List;

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 com.alibaba.fastjson.JSON;

public class ArrayListArgumentResolver implements HandlerMethodArgumentResolver {

    @Override
    public boolean supportsParameter(MethodParameter parameter) {
        return ArrayList.class.isAssignableFrom(parameter.getParameterType());
    }

    @Override
    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
            NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
            /**
             * 获取 Collection 中的泛型类型进行映射实例化
             */
            Type[] types = ((ParameterizedType)parameter.getGenericParameterType()).getActualTypeArguments();
            if (types.length==0) {
                throw new RuntimeException("com.huaqin.workflow.handler.CollectionsArgumentResolver:检测不到泛型映射");
            }
            Class<?> clazz = (Class<?>) types[0];
            
            /**
             * 通过参数名称获取请求数据
             */
            List<?> list = JSON.parseArray(webRequest.getParameter(parameter.getParameterName()),clazz);
        return list;
    }
}

二、交由Spring MVC处理器处理

package com.huaqin.workflow.controller;

import java.util.List;

import org.springframework.context.annotation.Configuration;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;

import com.alibaba.fastjson.support.spring.FastJsonHttpMessageConverter;

@Configuration
public class WebMvcConfg implements WebMvcConfigurer {

	
	@Override
	public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
		// TODO Auto-generated method stub
		converters.add(0, new FastJsonHttpMessageConverter());
		WebMvcConfigurer.super.configureMessageConverters(converters);
	}
	
}

完成自动映射