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springMVC中复杂嵌套对象、List等集合类型数据绑定

2014-11-15 10:38 232 查看


springMVC中复杂嵌套对象、List等集合类型数据绑定

[一]、概述

继前面一篇springMVC页面中多个对象的数据绑定，本文主要介绍如果实现复杂类型对象的数据绑定，比如前文中的父级对象CourseInfo中增加：String[]times,List<Student>
studentList这两个复杂类型属性，页面中数据如何才能准确绑定到对象上呢？

[二]、实现方法及测试

CourseInfo.java修改成如下：

查看源代码

打印帮助

1
package
com.micmiu.demo.web.v2.demo.vo;
2
3
import
java.util.List;
4
5
import
org.apache.commons.lang3.builder.ToStringBuilder;
6
7
import
com.micmiu.demo.web.v2.demo.entity.Course;
8
import
com.micmiu.demo.web.v2.demo.entity.Student;
9
import
com.micmiu.demo.web.v2.demo.entity.Teacher;
10
11
/**
12
*课程信息(view层)
13
*
14
*@author<ahref="http://www.micmiu.com">MichaelSun</a>
15
*/
16
public
class
CourseInfo{
17
18
//课程介绍
19
private

Coursecourse;
20
21
//老师信息
22
private

Teacherteacher;
23
24
//上课时间
25
private

String[]times;
26
27
//学生列表
28
private

List<Student>studentList;
29
30
public

CoursegetCourse(){
31
return

course;
32
}
33
34
public

TeachergetTeacher(){
35
return

teacher;
36
}
37
38
public

void
setCourse(Coursecourse){
39
this
.course=course;
40
}
41
42
public

void
setTeacher(Teacherteacher){
43
this
.teacher=teacher;
44
}
45
46
public

String[]getTimes(){
47
return

times;
48
}
49
50
public

List<Student>getStudentList(){
51
return

studentList;
52
}
53
54
public

void
setTimes(String[]times){
55
this
.times=times;
56
}
57
58
public

void
setStudentList(List<Student>studentList){
59
this
.studentList=studentList;
60
}
61
62
@Override
63
public

StringtoString(){
64
return

ToStringBuilder.reflectionToString(
this
);
65
}
66
}
Student.java:

查看源代码

打印帮助

1
package
com.micmiu.demo.web.v2.demo.entity;
2
3
import
javax.persistence.Column;
4
import
javax.persistence.Entity;
5
import
javax.persistence.Table;
6
7
import
org.apache.commons.lang3.builder.ToStringBuilder;
8
9
import
com.micmiu.demo.web.v2.base.entity.IdEntity;
10
11
/**
12
*学生信息
13
*
14
*@author<ahref="http://www.micmiu.com">MichaelSun</a>
15
*/
16
@Entity
17
@Table
(name=
"T_DEMO_STUDENT"
)
18
public
class
Student
extends

IdEntity{
19
20
@Column
(name=
"NAME"
)
21
private

Stringname;
22
23
@Column
(name=
"EMAIL"
)
24
private

Stringemail;
25
26
@Column
(name=
"CLASS_NAME"
)
27
private

StringclassName;
28
29
public

StringgetName(){
30
return

name;
31
}
32
33
public

StringgetEmail(){
34
return

email;
35
}
36
37
public

StringgetClassName(){
38
return

className;
39
}
40
41
public

void
setName(Stringname){
42
this
.name=name;
43
}
44
45
public

void
setEmail(Stringemail){
46
this
.email=email;
47
}
48
49
public

void
setClassName(StringclassName){
50
this
.className=className;
51
}
52
53
@Override
54
public

StringtoString(){
55
return

ToStringBuilder.reflectionToString(
this
);
56
}
57
}
view层页面修改成如下：

查看源代码

打印帮助

1
<
form:form

id
=
"input-form"

modelAttribute
=
"courseInfo"
2
action
=
"${ctx}/demo/course.do?method=save"

method
=
"post"
>
3
<
input

type
=
"hidden"

name
=
"id"

value
=
"${course.id}"

/>
4
<
fieldset

class
=
"prepend-top"
>
5
<
legend
>课程信息</
legend
>
6
<
div

id
=
"messageBox"

class
=
"error-msg"

style
=
"display:none"
>输入有误，请先更正。</
div
>
7
<
div
>
8
<
label

for
=
"course.name"

class
=
"field"
>课程名称:</
label
><
input
9
type
=
"text"

id
=
"course.name"

name
=
"course.name"

size
=
"20"
10
value
=
"${courseInfo.course.name}"

class
=
"required"

/>
11
</
div
>
12
<
div
>
13
<
label

for
=
"course.description"

class
=
"field"
>课程介绍:</
label
><
input
14
type
=
"text"

id
=
"course.description"

name
=
"course.description"
15
size
=
"20"

value
=
"${courseInfo.course.description}"

class
=
"required"

/>
16
</
div
>
17
18
<
div
>
19
<
label

for
=
"teacher.name"

class
=
"field"
>老师姓名:</
label
><
input
20
type
=
"text"

id
=
"teacher.name"

name
=
"teacher.name"

size
=
"20"
21
value
=
"${courseInfo.teacher.name}"

class
=
"required"

/>
22
</
div
>
23
<
div
>
24
<
label

for
=
"teacher.email"

class
=
"field"
>老师Email:</
label
><
input
25
type
=
"text"

id
=
"teacher.email"

name
=
"teacher.email"

size
=
"20"
26
value
=
"${courseInfo.teacher.email}"

class
=
"required"

/>
27
</
div
>
28
<
div
>
29
<
label

for
=
"times"

class
=
"field"
>上课时间:</
label
><
input

type
=
"text"
30
id
=
"times[0]"

name
=
"times"

size
=
"20"

value
=
"周一"

class
=
"required"

/>
31
<
input

type
=
"text"

id
=
"times[1]"

name
=
"times"

size
=
"20"

value
=
"周三"
32
class
=
"required"

/><
input
type
=
"text"

id
=
"times[2]"

name
=
"times"
33
size
=
"20"

value
=
"周五"

class
=
"required"

/>
34
</
div
>
35
36
<
div
>
37
<
label

for
=
"studentList[0].name"

class
=
"field"
>学生1姓名:</
label
><
input
38
type
=
"text"

id
=
"studentList[0].name"

name
=
"studentList[0].name"

size
=
"20"
39
value
=
"学生1姓名"

class
=
"required"

/>
40
</
div
>
41
<
div
>
42
<
label

for
=
"studentList[0].email"

class
=
"field"
>学生1Email:</
label
><
input
43
type
=
"text"

id
=
"studentList[0].email"

name
=
"studentList[0].email"

size
=
"20"
44
value
=
"学生1Email"

class
=
"required"

/>
45
</
div
>
46
<
div
>
47
<
label

for
=
"studentList[1].name"

class
=
"field"
>学生2姓名:</
label
><
input
48
type
=
"text"

id
=
"studentList[1].name"

name
=
"studentList[1].name"

size
=
"20"
49
value
=
"学生2姓名"

class
=
"required"

/>
50
</
div
>
51
<
div
>
52
<
label

for
=
"studentList[1].email"

class
=
"field"
>学生2Email:</
label
><
input
53
type
=
"text"

id
=
"studentList[0].email"

name
=
"studentList[1].email"

size
=
"20"
54
value
=
"学生2Email"

class
=
"required"

/>
55
</
div
>
56
</
fieldset
>
注意：复杂对象在页面元素中各属性的定义规则。

controller对应的CourseAction.java实现修改成如下：

查看源代码

打印帮助

1
@RequestMapping
(params={
"method=save"
})
2
@ResponseBody
3
public

Stringsave(Modelmodel,ModelAndViewmv,CourseInfocourseInfo,
4
RedirectAttributesredirectAttributes){
5
System.out.println(
"course>>"

+courseInfo.getCourse());
6
System.out.println(
"teacher>>"

+courseInfo.getTeacher());
7
8
for

(Stringtime:courseInfo.getTimes()){
9
System.out.println(
"time>>"

+time);
10
}
11
for

(Studentstudent:courseInfo.getStudentList()){
12
System.out.println(
"student>>"

+student);
13
}
14
15
System.out.println(
"courseInfo>>"

+courseInfo);
16
Stringmessage=
"save"
;
17
redirectAttributes.addFlashAttribute(
"message"
,message);
18
return

message;
19
}
controller中的部分方法省略，这里主要测试下页面数据绑定的结果，测试过程如下：

表单输入内容如下图：





提交后，控制台输出日志如下：

course>>com.micmiu.demo.web.v2.demo.entity.Course@e11326[name=课程名称,description=课程介绍,id=<null>]
teacher>>com.micmiu.demo.web.v2.demo.entity.Teacher@b03bd5[name=老师姓名,email=老师Email,grade=<null>,id=<null>]
time>>周一
time>>周三
time>>周五
student>>com.micmiu.demo.web.v2.demo.entity.Student@13cd6aa[name=学生1姓名,email=学生1Email,className=<null>,id=<null>]
student>>com.micmiu.demo.web.v2.demo.entity.Student@13137a2[name=学生2姓名,email=学生2Email,className=<null>,id=<null>]
courseInfo>>com.micmiu.demo.web.v2.demo.vo.CourseInfo@ce4be6[course=com.micmiu.demo.web.v2.demo.entity.Course@e11326[name=课程名称,description=课程介绍,id=<null>],teacher=com.micmiu.demo.web.v2.demo.entity.Teacher@b03bd5[name=老师姓名,email=老师Email,grade=<null>,id=<null>],times={周一,周三,周五},studentList=[com.micmiu.demo.web.v2.demo.entity.Student@13cd6aa[name=学生1姓名,email=学生1Email,className=<null>,id=<null>],com.micmiu.demo.web.v2.demo.entity.Student@13137a2[name=学生2姓名,email=学生2Email,className=<null>,id=<null>]]]

从日志中可以看出:不管是string数组对象times还是复杂列表对象studentList，数据绑定准确无误。
                                            

                                        

                        
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