SpringBoot集成自定义HandlerMethodArgumentResolver

传统SpringMVC集成自定义HandlerMethodArgumentResolver的方式为：http://www.cnblogs.com/yangzhilong/p/6282218.html

在SpringBoot中是去配置文件化的，具体做法有：

1、启动类继承WebMvcConfigurerAdapter

2、另外写一个@Configuration注解的来继承WebMvcConfigurerAdapter（推荐）

import java.util.List;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

import org.springframework.context.annotation.ComponentScan;

import org.springframework.web.method.support.HandlerMethodArgumentResolver;

import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

import com.longge.LoginUserInfoMethodArgumentResolver;

@SpringBootApplication

public class MyBootApplication extends WebMvcConfigurerAdapter{

    public static void main(String[] args) {

        SpringApplication.run(MyBootApplication.class, args);

    }

    @Override

    public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) {

        super.addArgumentResolvers(argumentResolvers);

        argumentResolvers.add(new LoginUserInfoMethodArgumentResolver());

    }

}

import org.apache.commons.lang3.StringUtils;

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.longge.utils.Constant;

import com.longge.utils.RedisCacheUtils;

/**

 * 获取用户的session dto

 */

public class LoginUserInfoMethodArgumentResolver implements HandlerMethodArgumentResolver {

    @Override

    public Object resolveArgument(MethodParameter arg0, ModelAndViewContainer arg1, NativeWebRequest arg2,

            WebDataBinderFactory arg3) throws Exception {

        String token = arg2.getHeader(Constant.TOKEN_KEY);

        if(StringUtils.isNotBlank(token)) {

            return RedisCacheUtils.getUserInfo(token);

        }

        return null;

    }

    @Override

    public boolean supportsParameter(MethodParameter arg0) {

        return arg0.getParameterType().equals(UserInfo.class);

    }

}

使用方法：

@ApiOperation("新增")

@PutMapping("add")

public ResponseResult<SupplierDto> add(UserInfo userInfo, @Valid @RequestBody SupplierDto supplierDto) {

    // 这里的UserInfo不需要加任何注解，因为LoginUserInfoMethodArgumentResolver是对class的类型来解析的

}