文章目录
1.RequestMapping注解
1.1 注解加在方法上
1.2 注解加在类上
2.ResultMapping的属性
2.1 value属性
2.2 Method属性
2.3 params属性
2.4 headers属性
3.路径``
1.RequestMapping注解
RequestMapping注解的作用是建立请求URL和处理方法之间的关系
RequestMapping注解可以作用在类上和方法上
作用在类上:第一级的访问目录
作用在方法上:第二级的访问目录
1.1 注解加在方法上
如果注解加在方法上代表二级目录
- @Controller
- public class HelloController {
- @RequestMapping(path = "/testRequestMapping")
- public String testRequestMapping(){
- System.out.println("测试RequestMapping注解");
- return "success";
- }
- }
那么请求路径为:
- <%@ page contentType="text/html;charset=UTF-8" language="java" %>
- <html>
- <head>
- <title>$Title$title>
- head>
- <body>
- <a href="/testRequestMapping">RequestMapping注解a>
- body>
- html>
2.ResultMapping的属性
path:指定请求路径的URL
value:value属性和path属性是一样的
method:指定该方法请求方式
params:指定限制请求参数的条件
headers:发送的请求中必须包含的请求头
2.1 value属性
当只有一个value和path属性时,关键字可以省略:
- @Controller
- @RequestMapping(path = "/user")
- public class HelloController {
- @RequestMapping(value = "/testRequestMapping")
- public String testRequestMapping(){
- System.out.println("测试RequestMapping注解");
- return "success";
- }
- }
- <%@ page contentType="text/html;charset=UTF-8" language="java" %>
- <html>
- <head>
- <title>$Title$title>
- head>
- <body>
- <a href="/user/testRequestMapping">RequestMapping注解a>
- body>
- html>
- @Controller
- @RequestMapping(path = "/user")
- public class HelloController {
- @RequestMapping(value = "/testRequestMapping",method = {RequestMethod.POST})
- public String testRequestMapping(){
- System.out.println("测试RequestMapping注解");
- return "success";
- }
- }
2.3 params属性
如果只指定username属性
- @Controller
- @RequestMapping(path = "/user")
- public class HelloController {
- @RequestMapping(value = "/testRequestMapping",params = {"username"})
- public String testRequestMapping(){
- System.out.println("测试RequestMapping注解");
- return "success";
- }
- }
那么请求路径为中username的属性值可以为任意的
- <%@ page contentType="text/html;charset=UTF-8" language="java" %>
- <html>
- <head>
- <title>$Title$title>
- head>
- <body>
- <a href="/user/testRequestMapping?username=ghh">RequestMapping注解a>
- body>
- html>
如果指定username的属性值
- @Controller
- @RequestMapping(path = "/user")
- public class HelloController {
- @RequestMapping(value = "/testRequestMapping",params = {"username=haha"})
- public String testRequestMapping(){
- System.out.println("测试RequestMapping注解");
- return "success";
- }
- }
- <%@ page contentType="text/html;charset=UTF-8" language="java" %>
- <html>
- <head>
- <title>$Title$title>
- head>
- <body>
- <a href="/user/testRequestMapping?username=haha">RequestMapping注解a>
- body>
- html>
- @Controller
- @RequestMapping(path = "/user")
- public class HelloController {
- @RequestMapping(value = "/testRequestMapping",headers = {"Accept"})
- public String testRequestMapping(){
- System.out.println("测试RequestMapping注解");
- return "success";
- }
- }
如果没有配置项目路径也没有配置/
,那么就可以不用加/