Spring MVC學習筆記2
這一篇部落格講的是三種方式通過Spring MVC傳參
1,根據HttpServletRequest物件進行傳參:controller 的程式碼如下:
/*
* 根據HttpServletRequest 物件傳遞引數
*/
@RequestMapping(value="/userInfo.do")
public String getUserInfo(HttpServletRequest request){
String userName = request.getParameter("userName");
String password = request.getParameter("password");
System.out.println("userName:"+userName+"\npassWord:"+password);
return "index";
}
2,直接將form表單中input的name作為引數傳入,這種方法可以適用於多種型別的傳參,但是需要用基本型別的封裝型別。如:int用Integer double用Double
示例程式碼如下:
/*
* 根據引數名直接傳遞引數,引數名稱需要與input的name保持一致
*/
@RequestMapping(value="/userInfo2.do")
public String getUserInfo2(String userName,String password){
System.out.println("userName:"+userName+"\npassword:"+password);
return "index";
}
3,通過bean物件作為引數進行傳參,這種方法十分方便,但要注意的是,form表單中,input的name值需要與類中變數的命名相同,並且型別同樣設定為封裝型別。
示例程式碼如下:
@RequestMapping(value="/userInfo3.do")
public String getUserInfo3(UserInfo userInfo){
System.out.println(userInfo);
return "index";
}
bean的程式碼:
public class UserInfo {
private Integer number;
private String name;
private Double score;
@Override
public String toString() {
return "UserInfo [number=" + number + ", name=" + name + ", score="
+ score + "]";
}
public Integer getNumber() {
return number;
}
public void setNumber(Integer number) {
this.number = number;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public double getScore() {
return score;
}
public void setScore(double score) {
this.score = score;
}
}