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JAVAweb学习日记（六）请求响应

article 2025/1/23 17:08:34

一、请求-简单参数&实体参数

原始方式：

package com.itheima.controller;

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

import javax.servlet.http.HttpServletRequest;

//测试请求参数接受
@RestController
public class RequestController {

    //原始方式
    @RequestMapping("/simpleParam")
    public String simpleParam(HttpServletRequest request){
        String name=request.getParameter("name");
        String agestr=request.getParameter("age");

        int age=Integer.parseInt(agestr);
        System.out.println(name+":"+age);
        return "OK";
    }
}

Springboot方式：

package com.itheima.controller;

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

import javax.servlet.http.HttpServletRequest;

//测试请求参数接受
@RestController
public class RequestController {

    //原始方式
/*    @RequestMapping("/simpleParam")
    public String simpleParam(HttpServletRequest request){
        String name=request.getParameter("name");
        String agestr=request.getParameter("age");

        int age=Integer.parseInt(agestr);
        System.out.println(name+":"+age);
        return "OK";
    }*/

    //springboot方式
    @RequestMapping("/simpleParam")
    public String simpleParam(String name,Integer age){
        System.out.println(name+":"+age);
        return "OK";
    }
}

请求参数不匹配：

package com.itheima.controller;

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

import javax.servlet.http.HttpServletRequest;

//测试请求参数接受
@RestController
public class RequestController {

    //springboot方式
    @RequestMapping("/simpleParam")
    public String simpleParam(@RequestParam(name="name",required = false) String uuusername, Integer age){
        //传递的参数  required=false 表示当前注解的参数可以不传递  若没有标记flase则该注解函数必须传递否则报错
        System.out.println(uuusername+":"+age);
        return "OK";
    }
}

小结：

实体参数：

简单实体对象：

package com.itheima.controller;

import com.itheima.pojo.User;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;

//测试请求参数接受
@RestController
public class RequestController {
    //实体参数
    @RequestMapping("/simplePojo")
    public String simplePojo(User user){
        System.out.println(user);
        return "OOK";
    }
}

复杂实体对象：

package com.itheima.controller;

import com.itheima.pojo.User;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import javax.servlet.http.HttpServletRequest;

//测试请求参数接受
@RestController
public class RequestController {

    //实体复杂对象
    @RequestMapping("/complexPojo")
    public String complexPojo(User user){
        System.out.println(user);
        return "OOKK";
    }
}