SpringMVC通过注解获得参数的实例

SpringMVC通过注解获得参数的实例

SpringMVC可以通过RequestParam注解来映射获得参数，具体用法如下：

例子：

配置过程省略

1.新建controller类

package com.loger.controller;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

@Controller

public class RequestParam {

public static final String SUCCESS = "success";

@RequestMapping(value="/requestparam")

public String requestParam(@org.springframework.web.bind.annotation.

RequestParam(value="username") String un,

http:// @org.springframework.web.bind.annotation.RequestParam(value="age") Integer age){

System.out.println(un + " " + age);

return SUCCESS;

}

}

2.index.jsp

运行结果：

补充：如果表单名跟方法的参数名一致的话，无需再用@RequestParam注解来映射。

如改为

@RequestMapping(value="/requestparam")

public String requestParam(String username,Integer age)即可！

用类作为参数，且包含级联属性的参数获取方法：

1.新建Adress类

package com.loger.bean;

public class Address {

private String province;

private String city;

public String getProvince() {

return province;

}

public void setProvince(String province) {

this.province = province;

}

public String getCity() {

return city;

}

public void setCity(String city) {

this.city = city;

}

@Override

public String toString() {

return "Address [province=" + province + ", city=" + city + "]";

}

}

2.新建User类

package com.loger.bean;

public class User {

private String name;

private int age;

FIYEYprivate Address address;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public Address getAddress() {

return address;

}

public void setAddress(Address address) {

this.address = address;

}

@Override

public String toString() {

return "User [name=" + name + ", age=" + age + ", address=" + address + "]";

}

}

3.controller

4.表单

User有级联属性Address，表单传入的参数是address.city address.province

姓名：

年龄：

城市：

省份：

运行结果：

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