Spring MVC初步使用

Spring MVC 几种传参方式

本次沿用上次的工程，在controller中添加几个方法

创建User模型

public class User {  private String username;  private String password;  public String getUsername() {    return username;  }  public void setUsername(String username) {    this.username = username;  }  public String getPassword() {    return password;  }  public void setPassword(String password) {    this.password = password;  }}

修改IndexController

直接把表单参数写入Controller的相应方法中

@RequestMapping("/addUser1")  public String addUser1(String username, String password) {    System.out.println("username is:" + username);    System.out.println("password is:" + password);    return "index";  }

通过user bean 来接收

@RequestMapping("/addUser2")  public String addUser3(UserModel user) {    System.out.println("username is:"+user.getUsername());    System.out.println("password is:"+user.getPassword());    return "index";  }

通过HttpServletRequest来接收

@RequestMapping("/addUser3")  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 "index";  }

通过PathVariable接收

@RequestMapping(value = "/addUser4/{username}/{password}", method = RequestMethod.GET)  public String addUser4(@PathVariable String username, @PathVariable String password) {    System.out.println("username is:" + username);    System.out.println("password is:" + password);    return "index";  }

用注解@RequestParam绑定请求参数

@RequestMapping(value = "/addUser5", 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 "index";  }