Java Spring Controller 获取请求参数的几种方法
1、直接把表单的参数写在Controller相应的方法的形参中,适用于get方式提交,不适用于post方式提交。若"Content-Type"="application/x-www-form-urlencoded",可用post提交
url形式:http://localhost:8080/SSMDemo/demo/addUser1?username=lixiaoxi&password=111111 提交的参数需要和Controller方法中的入参名称一致。
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/** * 1.直接把表单的参数写在Controller相应的方法的形参中 * @param username * @param password * @return */ @RequestMapping ( "/addUser1" ) public String addUser1(String username,String password) { System.out.println( "username is:" +username); System.out.println( "password is:" +password); return "demo/index" ; } |
2、通过HttpServletRequest接收,post方式和get方式都可以。
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/** * 2、通过HttpServletRequest接收 * @param request * @return */ @RequestMapping ( "/addUser2" ) public String addUser2(HttpServletRequest request) { String username=request.getParameter( "username" ); String password=request.getParameter( "password" ); System.out.println( "username is:" +username); System.out.println( "password is:" +password); return "demo/index" ; } |
3、通过一个bean来接收,post方式和get方式都可以。
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/** * 3、通过一个bean来接收 * @param user * @return */ @RequestMapping ( "/addUser3" ) public String addUser3(UserModel user) { System.out.println( "username is:" +user.getUsername()); System.out.println( "password is:" +user.getPassword()); return "demo/index" ; } |
4、使用@ModelAttribute注解获取POST请求的FORM表单数据
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/** * 4、使用@ModelAttribute注解获取POST请求的FORM表单数据 * @param user * @return */ @RequestMapping (value= "/addUser5" ,method=RequestMethod.POST) public String addUser5( @ModelAttribute ( "user" ) UserModel user) { System.out.println( "username is:" +user.getUsername()); System.out.println( "password is:" +user.getPassword()); return "demo/index" ; } |
5、用注解@RequestParam绑定请求参数到方法入参
当请求参数username不存在时会有异常发生,可以通过设置属性required=false解决,例如:
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@RequestParam (value= "username" , required= false ) **** 若 "Content-Type" = "application/x-www-form-urlencoded" ,post get都可以 **** 若 "Content-Type" = "application/application/json" ,只适用get /** * 5、用注解@RequestParam绑定请求参数到方法入参 * @param username * @param password * @return */ @RequestMapping (value= "/addUser6" ,method=RequestMethod.GET) public String addUser6( @RequestParam ( "username" ) String username, @RequestParam ( "password" ) String password) { System.out.println( "username is:" +username); System.out.println( "password is:" +password); return "demo/index" ; } |
6、用request.getQueryString() 获取spring MVC get请求的参数,只适用get请求
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@RequestMapping (value= "/addUser6" ,method=RequestMethod.GET) public String addUser6(HttpServletRequest request) { System.out.println( "username is:" +request.getQueryString()); return "demo/index" ; } |
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原文链接:http://www.cnblogs.com/wxwBlog/p/6128882.html