RequestMapping

@RequestMapping(value="welcome",method=RequestMethod.POST,params= {"name=zs","age!=23","!height"})

要求请求链接：
method规定请求方式必须是：post
params参数规定：name属性值必须为zs，可以没有age属性，如果有age属性，则其值一定不能为23。不能出现height属性

合法请求：

localhost:8080/SPringMVCProject/welcome
name="zs" 

	@RequestMapping(value="welcome2",headers= {"Accept=text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8","Accept-Encoding=gzip, deflate"})
要求请求头：必须有上述headers属性值
	

@RequestHeader 和 @CookieValue 注解

	//获取请求头的指定属性
	@RequestMapping(value = "testRequestHeader", method=RequestMethod.GET)
	public String testRequestHeader(@RequestHeader("Accept") String ac) {
		System.out.println("请求头accept："+ac);//请求头accept：text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9

		return "success"; //返回 success页面
	}
	//获取cookieValue的值
	@RequestMapping(value = "testCookieValue", method=RequestMethod.GET)
	public String testCookieValue(@CookieValue("JSESSIONID") String js) {
		System.out.println("jseesionid："+js); //jseesionid：FB9258C7DA7A98699C2ABC9491AC6146
		return "success"; //返回 success页面
	}

RequestParam 注解

@RequestParam(“uname”):接受前台传递的值，uname 属性不能没有,（但是可以通过require=false 来设置允许没有）等价于request.getParameter(“uname”);

@RequestParam(“uname”) String name,@RequestParam(value=“uage”,required=false,defaultValue=“23”)
:接受前台只传递uname属性，uage可以没有，如果没有有默认值为23.
required=false:该属性 不是必须的。
defaultValue=“23”：默认值23

ant风格

ant风格的请求路径

?  单字符
*  任意个字符（0或多个）
** 任意目录

@RequestMapping(value="welcome3/**/test") 
正确链接请求如：localhost:8080/SPringMVCProject/welcome3/xyz/abcz/asb/test


@RequestMapping(value="welcome4/a?c/test")
正确链接请求如：localhost:8080/SPringMVCProject/welcome4/axc/test


前端请求中有name属性，该属性的值被@PathVariable注解按名（name）获取传递给参数String name
@RequestMapping(value="welcome5/{name}")
public String  welcome5(@PathVariable("name") String name ) {
	System.out.println(name);
	return "success" ;//  views/success.jsp，默认使用了 请求转发的 跳转方式
}

使用对象来接受请求参数

实体类Student.java

package com.johnny.entity;

public class Student {
	private int id;
	private String name;
	private Address address ;
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Address getAddress() {
		return address;
	}
	public void setAddress(Address address) {
		this.address = address;
	}
	
}	

Address.java

package com.johnny.entity;

public class Address {
	private String homeAddress ; 
	private String schoolAddress ;
	public String getHomeAddress() {
		return homeAddress;
	}
	public void setHomeAddress(String homeAddress) {
		this.homeAddress = homeAddress;
	}
	public String getSchoolAddress() {
		return schoolAddress;
	}
	public void setSchoolAddress(String schoolAddress) {
		this.schoolAddress = schoolAddress;
	}
	
	@Override
	public String toString() {
		// TODO Auto-generated method stub
		return "address：["+ this.homeAddress+" " +this.schoolAddress+" ]";
	}
}

要求前端属性值必须实体类的属性名一一对应

	<form action="testObject" method="get">
		id:<input type="text" name="id">
		name:<input type="text" name="name">
		homeAddress:<input type="text" name="address.homeAddress">
		schoolAddress:<input type="text" name="address.schoolAddress">
		<input type="submit" value="查">
	</form>

使用Servlet类

在SpringMVC中使用原生态的Servlet API :HttpServletRequest ：直接将 servlet-api中的类、接口等 写在springMVC所映射的方法参数中即可：

		@RequestMapping(value="testServletAPI")
		public String testServletAPI(HttpServletRequest  request,HttpServletResponse response) {
//			request.getParameter("uname") ;
			System.out.println(request);
			return "success" ;
		}

原文链接:https://blog.csdn.net/weixin_44855907/article/details/117297911