转:Spring mvc中@RequestMapping 6个基本用法小结
2024-08-28 20:02:49
小结下spring mvc中的@RequestMapping的用法。
1)最基本的,方法级别上应用,例如:
Java代码
- @RequestMapping(value="/departments")
- public String simplePattern(){
- System.out.println("simplePattern method was called");
- return "someResult";
- }
则访问http://localhost/xxxx/departments的时候,会调用 simplePattern方法了
2) 参数绑定
Java代码
- @RequestMapping(value="/departments")
- public String findDepatment(
- @RequestParam("departmentId") String departmentId){
- System.out.println("Find department with ID: " + departmentId);
- return "someResult";
- }
形如这样的访问形式:
/departments?departmentId=23就可以触发访问findDepatment方法了
3 REST风格的参数
Java代码
- @RequestMapping(value="/departments/{departmentId}")
- public String findDepatment(@PathVariable String departmentId){
- System.out.println("Find department with ID: " + departmentId);
- return "someResult";
- }
形如REST风格的地址访问,比如:
/departments/23,其中用(@PathVariable接收rest风格的参数
4 REST风格的参数绑定形式之2
先看例子,这个有点象之前的:
Java代码
- @RequestMapping(value="/departments/{departmentId}")
- public String findDepatmentAlternative(
- @PathVariable("departmentId") String someDepartmentId){
- System.out.println("Find department with ID: " + someDepartmentId);
- return "someResult";
- }
这个有点不同,就是接收形如/departments/23的URL访问,把23作为传入的departmetnId,,但是在实际的方法findDepatmentAlternative中,使用
@PathVariable("departmentId") String someDepartmentId,将其绑定为
someDepartmentId,所以这里someDepartmentId为23
5 url中同时绑定多个id
Java代码
- @RequestMapping(value="/departments/{departmentId}/employees/{employeeId}")
- public String findEmployee(
- @PathVariable String departmentId,
- @PathVariable String employeeId){
- System.out.println("Find employee with ID: " + employeeId +
- " from department: " + departmentId);
- return "someResult";
- }
这个其实也比较好理解了。
6 支持正则表达式
Java代码
- @RequestMapping(value="/{textualPart:[a-z-]+}.{numericPart:[\\d]+}")
- public String regularExpression(
- @PathVariable String textualPart,
- @PathVariable String numericPart){
- System.out.println("Textual part: " + textualPart +
- ", numeric part: " + numericPart);
- return "someResult";
- }
比如如下的URL:/sometext.123,则输出:
Textual part: sometext, numeric part: 123.
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