spring mvc 参数绑定

基础类型

原始类型：id必须要传，否则报错。

@RequestMapping("/test")
@ResponseBody
public ResponseData test(int id) {}

包装类型：id可以不传，后台接受到null。

@RequestMapping("/test")
@ResponseBody
public ResponseData test(Integer id) {}

list&set

简单类型

前台

form表单

<form action="${ctx}/test/test" method="post">
    <input type="text" name="ids">
    <input type="text" name="ids">
    <input type="text" name="ids">
    <input type="submit">
</form>

ajax

var data = [];
data.push(1);
data.push(2);
data.push(3);
$.ajax({
    url: ctx + "/test/test",
    traditional:true,//必要
    data: {ids: data},
    success: function (result) {
        alert(result);
    }
})

后台

@RequestMapping("/test")
@ResponseBody
public ResponseData test(@RequestParam List<Integer>ids) {}

复杂类型

如list<User>users：（略）同json格式对象

数组

前台

form表单

<form action="${ctx}/test/test" method="post">
    <input type="text" name="ids">
    <input type="text" name="ids">
    <input type="text" name="ids">
    <input type="submit">
</form>

ajax

var data = [];
data.push(1);
data.push(2);
data.push(3);
$.ajax({
    url: ctx + "/test/test",
    traditional:true,//必要
    data: {ids: data},
    success: function (result) {
        alert(result);
    }
})

后台

@RequestMapping("/test")
@ResponseBody
public ResponseData test(Integer[]ids) {
}

map

前台

form

<form action="${ctx}/test/test" method="post">
    <input type="text" name="name">
    <input type="text" name="sex">
    <input type="submit">
</form>

ajax

var data = {name:"zhangsan",sex:"man"};
$.ajax({
    url: ctx + "/test/test",
    data:data,
    success: function (result) {
        alert(result);
    }
});

后台

@RequestMapping("/test")
@ResponseBody
public ResponseData test(@RequestParam Map<String,String> params) {}

pojo简单属性

前台

form

<form action="${ctx}/test/test" method="post">
    <input type="text" name="name">
    <input type="text" name="sex">
    <input type="submit">
</form>

ajax

var data = {name:"zhangsan",sex:"man"};
$.ajax({
    url: ctx + "/test/test",
    data:data,
    success: function (result) {
        alert(result);
    }
});

后台

@RequestMapping("/test")
@ResponseBody
public ResponseData test(User user) {}

public class User{
    private String name;
    private String sex;
    //get and set ...
}

pojo包含list

前台

form

<form action="${ctx}/test/test" method="post">
    <input type="text" name="userName" value="zhangsan">
    <input type="text" name="sex" value="123">
    <input type="text" name="posts[0].code" value="232"/>
    <input type="text" name="posts[0].name" value="ad"/>
    <input type="text" name="posts[1].code" value="ad"/>
    <input type="text" name="posts[1].name" value="232"/>
    <input type="submit">
</form>

ajax

var user={userName:"zhangsan",password:"123"};
user['posts[0].name']="ada";
user['posts[0].code']="ada";
user['posts[1].name']="ad";
user['posts[1].code']="ad2323a";
$.ajax({
    url: ctx + "/test/test",
    type:"post",
    contentType: "application/x-www-form-urlencoded",
    data:user,
    success: function (result) {
        alert(result);
    }
});

后台

public class User{
    private String name;
    private String sex;
    private List<Post> posts;
    //get and set ...
}

public class Post {
    private String code;
    private String name;
    //get and set ...
}

@RequestMapping("/test")
@ResponseBody
public ResponseData test(User user) {}

date类型

使用注解方式

绑定单个方法

对于传递参数为Date类型，可以在参数前添加@DateTimeFormat注解。如下：

@RequestMapping("/test")
public void test(@DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss") Date date){}

如果传递过来的是对象，可以在对象属性上添加注解。

@RequestMapping("/test")
public void test(Person person){}

Public class Person{
    @DateTimeFormat(pattern="yyyy-MM-dd HH:mm:ss")
    Private Date date;
    Private String name;
}

绑定整个controller的所有方法：

@Controller
public class FormController {

    @InitBinder
    public void initBinder(WebDataBinder binder) {
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        dateFormat.setLenient(false);
        binder.registerCustomEditor(Date.class, new CustomDateEditor(dateFormat, false));
    }
}

@Controller
public class FormController {
   @InitBinder
    protected void initBinder(WebDataBinder binder) {
        binder.addCustomFormatter(new DateFormatter("yyyy-MM-dd"));
    }
}

使用PropertyEditor方式

使用ConversionService方式

参考：

https://www.2cto.com/kf/201501/374062.html

https://docs.spring.io/spring/docs/current/spring-framework-reference/web.html#mvc-ann-initbinder

枚举类型

mvc配置文件添加：

 <!--枚举类型转化器-->
    <bean id="formattingConversionService"
          class="org.springframework.format.support.FormattingConversionServiceFactoryBean">
        <property name="converters">
            <set>
                <bean class="org.springframework.core.convert.support.StringToEnumConverterFactory"/>
            </set>
        </property>
    </bean>

参考：

Spring Boot绑定枚举类型参数

Spring MVC 自动为对象注入枚举类型

json格式对象

后台

@RequestMapping(value = "introductionData.do", method = {RequestMethod.POST})
@ResponseBody
public RestResult introductionData(@RequestBody SignData signData) {
}

public class SignData {
    private ApplicationInformation applicationInformation;
    private ApplyUserInformation applyUserInformation;
    private StudentInformation studentInformation;
    private List<VolunteerItem> volunteerItems;
    private ResidencePermit residencePermit;
    private List<Family> families;
	//get and set ...
}

前台

var data = {}
var applyUserInformation = {
    "applyName": APPLYNAME,
    "applyCardType": "0",
    "applyCardID": APPLYIDCARD,
    "applyMobile": APPLYMOBILE
};
var applicationInformation = {
    "live_address": nowaddress,
    "addressJZArea": addressJZArea,
    "schoolLevel": schoolLevel,
    "schoolType": schoolType,
    "applyName": APPLYNAME,
    "contacts": contacts,
    "contactNumber": contactNumber
};
var studentInformation = {
    "cardType": cardType,
    "cardID": cardID,
    "studentName": studentName,
    "studentType": studentType,
    "studentType1": studentSpecialCase,
    "isDisability": "0",
    "studentCategory": "0",
    "birthday":birthday,
    "graduationschool":SchoolName,
    "graduationclass":classNameinfo,
    "applyName": APPLYNAME
};
data["applyUserInformation"] = applyUserInformation;
data["applicationInformation"] = applicationInformation;
data["studentInformation"] = studentInformation;

$.ajax({
    url: ctx + '/overseasData.do',
    type: "post",
    data: JSON.stringify(data),
    contentType: "application/json;charset=utf-8",
    success: function (result) {}
})

参考：https://blog.csdn.net/qq_29663071/article/details/68922043