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：
- @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
- @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
- @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：
- @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
- @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
- @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.