控制器：

package com.awaimai.web;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

import java.util.HashMap;
import java.util.Map;

@RestController
public class kzq
{

    @RequestMapping("/param/requestparam22")
    public String requestParam22(@RequestParam(value = "username",defaultValue = "abc21") String name)
    {

        return name;
    }


}

　　

 

web访问：