SpringMVC的请求(上)

• 文章目录
• • @[TOC](文章目录)
• 一、获得请求参数
• 二、获得基本类型参数
• 三、获得pojo类型参数
• 四、获得数组类型参数
• 五、获得集合类型参数
• 六、请求数据乱码
• 七、参数绑定注解
• 八、获得Restful风格参数
• 九、自定义类型转换器
• 十、获得Servlet相关的API
• 十一、获得请求头
• 十二、@CookieValue

 @RequestMapping(value = "/quick11")
    @ResponseBody  //告诉SpringMVC框架不进行视图跳转，直接进行数据响应
    public void save11(String userName,int age) throws IOException {
        System.out.println(userName);
        System.out.println(age);
 //http://localhost:8080/SpringMVC/user/quick11?userName=jack&age=17
    }

@RequestMapping(value = "/quick12")
    @ResponseBody  //告诉SpringMVC框架不进行视图跳转，直接进行数据响应
    public void save12(User user) throws IOException {
        System.out.println(user);
//http://localhost:8080/SpringMVC/user/quick12?username=jack&age=22
    }

@RequestMapping(value = "/quick13")
    @ResponseBody  //告诉SpringMVC框架不进行视图跳转，直接进行数据响应
    public void save13(String [] strs) throws IOException {
        System.out.println(Arrays.asList(strs));
 //http://localhost:8080/SpringMVC/user/quick13?strs=111&strs=222&strs=333

    }

form.jsp:

<%--
  Created by IntelliJ IDEA.
  User: 86166
  Date: 2022/6/29
  Time: 17:14
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@page isELIgnored="false" %>


    



    
    
    
    
    

VO:

package com.study.domain;

import java.util.List;

public class VO {
    private List userList;

    public List getUserList() {
        return userList;
    }

    public void setUserList(List userList) {
        this.userList = userList;
    }

    @Override
    public String toString() {
        return "VO{" +
                "userList=" + userList +
                '}';
    }
}

 @RequestMapping(value = "/quick14")
    @ResponseBody  //告诉SpringMVC框架不进行视图跳转，直接进行数据响应
    public void save14(VO vo) throws IOException {
        System.out.println(vo);
    }

 
    
        
        characterEncodingFilter
        org.springframework.web.filter.CharacterEncodingFilter
        
            encoding
            utf-8
        
    
    
        characterEncodingFilter
        
        /*
    

 @RequestMapping(value = "/quick14")
    @ResponseBody  //告诉SpringMVC框架不进行视图跳转，直接进行数据响应
    public void save14(VO vo) throws IOException {
        System.out.println(vo);
    }

当请求参数名称与Controller的业务方法参数不一致时，需要通过@RequestParam注解显示绑定。

 @RequestMapping(value = "/quick15")
    @ResponseBody  //告诉SpringMVC框架不进行视图跳转，直接进行数据响应
    public void save15(@RequestParam(value = "name",required = false,defaultValue = "jack")String userName) throws IOException {
        System.out.println(userName);

    }

//http://localhost:8080/SpringMVC/user/quick16/jack
    @RequestMapping(value = "/quick16/{username}")
    @ResponseBody  //告诉SpringMVC框架不进行视图跳转，直接进行数据响应
    public void save16(@PathVariable("username") String userName) throws IOException {
        System.out.println(userName);

    }

1.实现DateConverter接口：

package com.study.converter;
import org.springframework.core.convert.converter.Converter;

import javax.xml.crypto.Data;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DateConverter implements Converter {

    @Override
    public Date convert(String dateStr) {
        //将日期字符串转换为日期对象 返回
        Date date=null;
        SimpleDateFormat d = new SimpleDateFormat("yyyy-MM-dd");
        try {
            date = d.parse(dateStr);
        } catch (ParseException e) {
            e.printStackTrace();
        }

        return date;
    }
}

2.声明转换器：

3.在annotation-driven中引用转换器

 @RequestMapping(value = "/quick17")
    @ResponseBody  //告诉SpringMVC框架不进行视图跳转，直接进行数据响应
    public void save17(Date date) throws IOException {
        System.out.println(date);

    }

 @RequestMapping(value = "/quick18")
    @ResponseBody  //告诉SpringMVC框架不进行视图跳转，直接进行数据响应
    public void save18(HttpServletRequest request, HttpServletResponse response, HttpSession session) throws IOException {
        System.out.println(request);
        System.out.println(response);
        System.out.println(session);

    }

 @RequestMapping(value = "/quick19")
    @ResponseBody  //告诉SpringMVC框架不进行视图跳转，直接进行数据响应
    public void save19(@RequestHeader(value = "User-Agent",required = false) String user_agent) throws IOException {
        System.out.println(user_agent);


    }

 @RequestMapping(value = "/quick20")
    @ResponseBody  //告诉SpringMVC框架不进行视图跳转，直接进行数据响应
    public void save20(@CookieValue(value = "JSESSIONID",required = false) String jsessionId) throws IOException {
        System.out.println(jsessionId);


    }