将前端请求中的数据绑定到Spring MVC响应方法中参数的四种方法

一、映射URL绑定的占位符到方法参数

1.方法

使用@PathVariable注解

2.代码示例

a.接收请求方法

@RequestMapping(value = "/deleteInfo/{id}")
public String deleteInfo(@PathVariable("id") int shopCartId) {
    return "删除成功";
}

b.发出请求

<a href="../shopCart/deleteInfo/1"></a>

 

二、绑定请求中的参数到方法参数

1.方法

使用@RequestParam注解

2.代码示例

a.接收请求方法

@RequestMapping(value = "/changeAmount")
public String changeAmount(@RequestParam(value = "amount") String amount,
        @RequestParam(value = "shopCartId") String shopCartId) {
  return "修改成功"; }

 b.发出请求

<a href="../shopCart/changeAmount?amount=3&shopCartId=10"></a>

 

三、绑定表单对象到方法参数(实例对象)

1.方法

创建表单发送请求

2.代码示例

a.接收请求方法

@RequestMapping("/saveInfo")
public String saveInfo(Book book){
    return "保存成功";
}

b.发出请求

<form action="../shopCart/saveInfo" method="post">
    BookName:<input type="text" name="bookName"><br>
    BookId:<input type="password" name="bookId"><br>
    sellerId:<input type="text" name="seller.sellerId"><br>
    sellerName:<input type="text" name="seller.sellerName"><br>
    <input type="submit" value="提交">
</form>

c.Book.java

public class Book{
  private int bookId;
  private String bookName;
  private Seller seller;
  // 省略getter和setter方法
}

d.Seller.java

public class Seller{
  private int sellerId;
  private String sellerName;
  // 省略getter和setter方法
}

 

四、绑定表单对象到方法参数(Map对象)

1.方法

创建表单发送请求

2.代码示例

a.接收请求方法

@RequestMapping("/getUser")
public String getUser(UserMap uMap) {
    Set set=uMap.getuMap().keySet();
    Iterator iterator=set.iterator();
    while(iterator.hasNext()) {
        Object keyName=iterator.next();
        User u=uMap.getuMap().get(keyName);
        System.out.println(u);
    }
    return "success";        
}

b.发出请求

<form action="../user/getUser" method="post">
    loginName1:<input type="text" name="uMap['u1'].loginName"><br>
    loginPwd1:<input type="password" name="uMap['u1'].loginPwd"><br>
    province1:<input type="text" name="uMap['u1'].address.province"><br>
    city1:<input type="text" name="uMap['u1'].address.city"><br>
    loginName2:<input type="text" name="uMap['u2'].loginName"><br>
    loginPwd2:<input type="password" name="uMap['u2'].loginPwd"><br>
    province2:<input type="text" name="uMap['u2'].address.province"><br>
    city2:<input type="text" name="uMap['u2'].address.city"><br>
    <input type="submit" value="提交">
</form>

c.UserMap.java

public class UserMap {
    private Map<String, User> uMap;

    public Map<String, User> getuMap() {
        return uMap;
    }

    public void setuMap(Map<String, User> uMap) {
        this.uMap = uMap;
    }
}

 

posted @ 2019-10-15 21:08  想看云飞却没风~  阅读(355)  评论(0编辑  收藏  举报