1）带占位符的URL是Spring3.0新增的功能，该功能在SpringMVC向REST目标挺进发展过程中具有里程碑的意义。
2）通过@PathVariable可以将URL中占位符参数绑定到控制器处理方法的入参中：URL中的{xxx}占位符可以通过@PathVariable("xxx")绑定到操作方法的入参中。
在HelloWord.java中添加testPathVariable方法：
package com.dx.springlearn.handlers; import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod; @Controller
@RequestMapping("class_requestmapping")
public class HelloWord {
private static String SUCCESS = "success"; @RequestMapping("/testPathVariable/{id}")
public String testPathVariable(@PathVariable(value = "id", required = true) Integer id) {
System.out.println("testPathVariable: id: " + id);
return SUCCESS;
}
}
index.jsp添加链接：
<a href="class_requestmapping/testPathVariable/1">testPathVariable</a>
<br>