Spring数据绑定大全

刚开始用spring mvc 做web开发时,经常会不知道如何合适绑定页面数据.用惯struts2的朋友更认为spring mvc 绑定数据不如struts2方便(本人最开始也是这么认为),经过一段时间的应用和测试,总结出以下几种情况,希望对刚接触spring mvc 的朋友有所帮助.

示例程序下载

查看spring源码可以看出spring支持转换的数据类型已经很多了.

 

org.springframework.beans.PropertyEditorRegistrySupport.java

[java] view plaincopy

1. /** 
2.      * Actually register the default editors for this registry instance. 
3.      */  
4.     private void doRegisterDefaultEditors() {  
5.         this.defaultEditors = new HashMap<Class, PropertyEditor>(64);  
6.         // Simple editors, without parameterization capabilities.  
7.         // The JDK does not contain a default editor for any of these target types.  
8.         this.defaultEditors.put(Charset.class, new CharsetEditor());  
9.         this.defaultEditors.put(Class.class, new ClassEditor());  
10.         this.defaultEditors.put(Class[].class, new ClassArrayEditor());  
11.         this.defaultEditors.put(Currency.class, new CurrencyEditor());  
12.         this.defaultEditors.put(File.class, new FileEditor());  
13.         this.defaultEditors.put(InputStream.class, new InputStreamEditor());  
14.         this.defaultEditors.put(Locale.class, new LocaleEditor());  
15.         this.defaultEditors.put(Pattern.class, new PatternEditor());  
16.         this.defaultEditors.put(Properties.class, new PropertiesEditor());  
17.         this.defaultEditors.put(Resource[].class, new ResourceArrayPropertyEditor());  
18.         this.defaultEditors.put(TimeZone.class, new TimeZoneEditor());  
19.         this.defaultEditors.put(URI.class, new URIEditor());  
20.         this.defaultEditors.put(URL.class, new URLEditor());  
21.         // Default instances of collection editors.  
22.         // Can be overridden by registering custom instances of those as custom editors.  
23.         this.defaultEditors.put(Collection.class, new CustomCollectionEditor(Collection.class));  
24.         this.defaultEditors.put(Set.class, new CustomCollectionEditor(Set.class));  
25.         this.defaultEditors.put(SortedSet.class, new CustomCollectionEditor(SortedSet.class));  
26.         this.defaultEditors.put(List.class, new CustomCollectionEditor(List.class));  
27.         this.defaultEditors.put(SortedMap.class, new CustomMapEditor(SortedMap.class));  
28.         // Default editors for primitive arrays.  
29.         this.defaultEditors.put(byte[].class, new ByteArrayPropertyEditor());  
30.         this.defaultEditors.put(char[].class, new CharArrayPropertyEditor());  
31.         // The JDK does not contain a default editor for char!  
32.         this.defaultEditors.put(char.class, new CharacterEditor(false));  
33.         this.defaultEditors.put(Character.class, new CharacterEditor(true));  
34.         // Spring's CustomBooleanEditor accepts more flag values than the JDK's default editor.  
35.         this.defaultEditors.put(boolean.class, new CustomBooleanEditor(false));  
36.         this.defaultEditors.put(Boolean.class, new CustomBooleanEditor(true));  
37.         // The JDK does not contain default editors for number wrapper types!  
38.         // Override JDK primitive number editors with our own CustomNumberEditor.  
39.         this.defaultEditors.put(byte.class, new CustomNumberEditor(Byte.class, false));  
40.         this.defaultEditors.put(Byte.class, new CustomNumberEditor(Byte.class, true));  
41.         this.defaultEditors.put(short.class, new CustomNumberEditor(Short.class, false));  
42.         this.defaultEditors.put(Short.class, new CustomNumberEditor(Short.class, true));  
43.         this.defaultEditors.put(int.class, new CustomNumberEditor(Integer.class, false));  
44.         this.defaultEditors.put(Integer.class, new CustomNumberEditor(Integer.class, true));  
45.         this.defaultEditors.put(long.class, new CustomNumberEditor(Long.class, false));  
46.         this.defaultEditors.put(Long.class, new CustomNumberEditor(Long.class, true));  
47.         this.defaultEditors.put(float.class, new CustomNumberEditor(Float.class, false));  
48.         this.defaultEditors.put(Float.class, new CustomNumberEditor(Float.class, true));  
49.         this.defaultEditors.put(double.class, new CustomNumberEditor(Double.class, false));  
50.         this.defaultEditors.put(Double.class, new CustomNumberEditor(Double.class, true));  
51.         this.defaultEditors.put(BigDecimal.class, new CustomNumberEditor(BigDecimal.class, true));  
52.         this.defaultEditors.put(BigInteger.class, new CustomNumberEditor(BigInteger.class, true));  
53.         // Only register config value editors if explicitly requested.  
54.         if (this.configValueEditorsActive) {  
55.             StringArrayPropertyEditor sae = new StringArrayPropertyEditor();  
56.             this.defaultEditors.put(String[].class, sae);  
57.             this.defaultEditors.put(short[].class, sae);  
58.             this.defaultEditors.put(int[].class, sae);  
59.             this.defaultEditors.put(long[].class, sae);  
60.         }  
61.     }  

 

 

1.基本数据类型

很简单,该怎么写就怎么写.

controller代码

[java] view plaincopy

1. @RequestMapping  
2.     public void test1(String name, Integer age, Double income, Boolean isMarried, String[] interests)  
3.     {  
4.         System.out.println("简单数据类型绑定=========");  
5.         System.out.println("名字:" + name);  
6.         System.out.println("年龄:" + age);  
7.         System.out.println("收入:" + income);  
8.         System.out.println("已结婚:" + isMarried);  
9.         System.out.println("兴趣:");  
10.         for (String interest : interests)  
11.         {  
12.             System.out.println(interest);  
13.         }  
14.         System.out.println("====================");  
15.     }  

 

jsp代码

[xhtml] view plaincopy

1. <form action="test1.do" method="post">  
2.     <div class="f_left">姓名:</div>  
3.     <div class="f_left"><input name="name" value="张三"/></div>  
4.     <div class="clear"></div>  
5.     <div class="f_left">年龄:</div>  
6.     <div class="f_left"><input name="age" value="20"/></div>  
7.     <div class="clear"></div>  
8.     <div class="f_left">收入:</div>  
9.     <div class="f_left"><input name="income" value="100000"/></div>  
10.     <div class="clear"></div>  
11.     <div class="f_left">结婚:</div>  
12.     <div class="f_left">  
13.     <input type="radio" name="isMarried" value="true" checked="checked"/>是  
14.     <input type="radio" name="isMarried" value="false"/>否</div>  
15.     <div class="clear"></div>  
16.     <div class="f_left">兴趣:</div>  
17.     <div class="f_left">  
18.     <input type="checkbox" name="interests" value="听歌" checked="checked"/>听歌  
19.     <input type="checkbox" name="interests" value="书法" checked="checked"/>书法  
20.     <input type="checkbox" name="interests" value="看电影" checked="checked"/>看电影  
21.     </div>  
22.     <div class="clear"></div>  
23.     <div><input type="submit" value="提交表单"/></div>  
24. </form>  

 

 

2.简单对象类型

与基本类型相拟,只不过绑定到对象上更加简洁.(类拟struts的ActionForm)

controller代码

[java] view plaincopy

1. @RequestMapping  
2.     public void test2(User user)  
3.     {  
4.         System.out.println("简单对象类型绑定=========");  
5.         System.out.println("名字:" + user.getName());  
6.         System.out.println("年龄:" + user.getAge());  
7.         System.out.println("收入:" + user.getIncome());  
8.         System.out.println("已结婚:" + user.getIsMarried());  
9.         System.out.println("========================");  
10.     }  

 

user代码

[java] view plaincopy

1. public class User {  
2.     private String name;  
3.     private Integer age;  
4.     private Boolean isMarried;  
5.     private Double income;  
6.     private String[] interests;  
7.       
8.     public String getName() {  
9.         return name;  
10.     }  
11.     public void setName(String name) {  
12.         this.name = name;  
13.     }  
14.     public Integer getAge() {  
15.         return age;  
16.     }  
17.     public void setAge(Integer age) {  
18.         this.age = age;  
19.     }  
20.     public Boolean getIsMarried() {  
21.         return isMarried;  
22.     }  
23.     public void setIsMarried(Boolean isMarried) {  
24.         this.isMarried = isMarried;  
25.     }  
26.     public Double getIncome() {  
27.         return income;  
28.     }  
29.     public void setIncome(Double income) {  
30.         this.income = income;  
31.     }  
32.     public String[] getInterests() {  
33.         return interests;  
34.     }  
35.     public void setInterests(String[] interests) {  
36.         this.interests = interests;  
37.     }  
38. }  

 

jsp代码

[xhtml] view plaincopy

1. <form action="test2.do" method="post">  
2.         <div class="f_left">姓名:</div>  
3.         <div class="f_left"><input name="name" value="lxf"/></div>  
4.         <div class="clear"></div>  
5.         <div class="f_left">年龄:</div>  
6.         <div class="f_left"><input name="age" value="20"/></div>  
7.         <div class="clear"></div>  
8.         <div class="f_left">收入:</div>  
9.         <div class="f_left"><input name="income" value="100000"/></div>  
10.         <div class="clear"></div>  
11.         <div class="f_left">结婚:</div>  
12.         <div class="f_left">  
13.         <input type="radio" name="isMarried" value="true" checked="checked"/>是  
14.         <input type="radio" name="isMarried" value="false"/>否</div>  
15.         <div class="clear"></div>  
16.         <div class="f_left">兴趣:</div>  
17.         <div class="f_left">  
18.         <input type="checkbox" name="interests" value="听歌" checked="checked"/>听歌  
19.         <input type="checkbox" name="interests" value="书法" checked="checked"/>书法  
20.         <input type="checkbox" name="interests" value="看电影" checked="checked"/>看电影  
21.         </div>  
22.         <div class="clear"></div>  
23.         <div><input type="submit" value="提交表单"/></div>  
24.     </form>  

 

 

3.List类型绑定

网上很多人都给不出答案,关键在于,List需要绑定在对象(ActionForm),直接写在request-mapping函数的参数是不行的,更重要的一点是要创建对象(ArrayList).

controller代码

[java] view plaincopy

1. @RequestMapping  
2.     public void test3(Club club)  
3.     {  
4.         System.out.println("list类型绑定=========");  
5.         System.out.println("会员:");  
6.         for (User user : club.getUsers())  
7.         {  
8.             System.out.println(user.getName());  
9.         }  
10.         System.out.println("========================");  
11.     }  

 

Club代码

[java] view plaincopy

1. public class Club {  
2.     private List<User> users = new ArrayList<User>();  
3.       
4.     public List<User> getUsers() {  
5.         return users;  
6.     }  
7.       
8.     public void setUsers(List<User> users) {  
9.         this.users = users;  
10.     }  
11. }  

 

jsp代码

[xhtml] view plaincopy

1. <form action="test3.do" method="post">  
2.         <div class="f_left">会员1号:</div>  
3.         <div class="f_left">  
4.         <input name="users[0].name" value="张三"/>  
5.         </div>  
6.         <div class="clear"></div>  
7.         <div class="f_left">会员2号:</div>  
8.         <div class="f_left">  
9.         <input name="users[1].name" value="李四"/>  
10.         </div>  
11.         <div class="clear"></div>  
12.         <div class="f_left">会员3号:</div>  
13.         <div class="f_left">  
14.         <input name="users[2].name" value="王五"/>  
15.         </div>  
16.         <div class="clear"></div>  
17.         <div><input type="submit" value="提交表单"/></div>  
18.     </form>  

 

 

4.Set类型绑定

与List类型相似,经测试表明,绑定Set数据时,必须先在Set对象中Add相应的数量的模型对象.

controller代码

[java] view plaincopy

1. @RequestMapping  
2.     public void test4(Club2 club)  
3.     {  
4.         System.out.println("set类型绑定=========");  
5.         System.out.println("会员:");  
6.         for (User user : club.getUsers())  
7.         {  
8.             System.out.println(user.getName());  
9.         }  
10.         System.out.println("========================");  
11.     }  

Club2代码

 

[java] view plaincopy

1. public class Club2 {  
2.     private Set<User> users = new LinkedHashSet<User>();  
3.       
4.     public Club2() {  
5.         users.add(new User());  
6.         users.add(new User());  
7.         users.add(new User());  
8.     }  
9.       
10.     public Set<User> getUsers() {  
11.         return users;  
12.     }  
13.     public void setUsers(Set<User> users) {  
14.         this.users = users;  
15.     }  
16. }  

 

 

jsp代码

[xhtml] view plaincopy

1. <form action="test4.do" method="post">  
2.         <div class="f_left">会员1号:</div>  
3.         <div class="f_left">  
4.         <input name="users[0].name" value="张三"/>  
5.         </div>  
6.         <div class="clear"></div>  
7.         <div class="f_left">会员2号:</div>  
8.         <div class="f_left">  
9.         <input name="users[1].name" value="李四"/>  
10.         </div>  
11.         <div class="clear"></div>  
12.         <div class="f_left">会员3号:</div>  
13.         <div class="f_left">  
14.         <input name="users[2].name" value="王五"/>  
15.         </div>  
16.         <div class="clear"></div>  
17.         <div><input type="submit" value="提交表单"/></div>  
18.     </form>  

 

 

5.Map类型绑定

最灵活的一种方式,可无限绑定未定义的参数,注意必须绑定在对象下(ActionForm).

controller代码

[java] view plaincopy

1. @RequestMapping  
2.     public void test5(UserForm userForm)  
3.     {  
4.         System.out.println("Map类型绑定=========");  
5.         System.out.println("名字:" + userForm.getUser().get("name"));  
6.         System.out.println("年龄:" + userForm.getUser().get("age"));  
7.         System.out.println("收入:" + userForm.getUser().get("income"));  
8.         System.out.println("已结婚:" + userForm.getUser().get("isMarried"));  
9.         System.out.println("========================");  
10.     }  

 

UserForm.java代码

[java] view plaincopy

1. public class UserForm {  
2.     private Map<String, String> userMap = new LinkedHashMap<String, String>();  
3.     private User user = new User();  
4.       
5.     public Map<String, String> getUserMap() {  
6.         return userMap;  
7.     }  
8.     public void setUserMap(Map<String, String> userMap) {  
9.         this.userMap = userMap;  
10.     }  
11.     public User getUser() {  
12.         return user;  
13.     }  
14.     public void setUser(User user) {  
15.         this.user = user;  
16.     }  
17.       
18. }  

 

jsp代码

[xhtml] view plaincopy

1. <form action="test5.do" method="post">  
2.         <div class="f_left">姓名:</div>  
3.         <div class="f_left"><input name="user['name']" value="张三"/></div>  
4.         <div class="clear"></div>  
5.         <div class="f_left">年龄:</div>  
6.         <div class="f_left"><input name="user['age']" value="20"/></div>  
7.         <div class="clear"></div>  
8.         <div class="f_left">收入:</div>  
9.         <div class="f_left"><input name="user['income']" value="100000"/></div>  
10.         <div class="clear"></div>  
11.         <div class="f_left">结婚:</div>  
12.         <div class="f_left">  
13.         <input type="radio" name="user['isMarried']" value="true" checked="checked"/>是  
14.         <input type="radio" name="user['isMarried']" value="false"/>否</div>  
15.         <div class="clear"></div>  
16.         <div><input type="submit" value="提交表单"/></div>  
17.     </form>  

 

 

6.复合类型绑定

controller代码

[java] view plaincopy

1. @RequestMapping  
2.     public void test6(UserForm userForm)  
3.     {  
4.         System.out.println("复合类型绑定=========");  
5.         System.out.println("名字:" + userForm.getUser().getName());  
6.         System.out.println("年龄:" + userForm.getUser().getAge());  
7.         System.out.println("收入:" + userForm.getUser().getIncome());  
8.         System.out.println("已结婚:" + userForm.getUser().getIsMarried());  
9.         System.out.println("========================");  
10.     }  

 

UserForm代码

[java] view plaincopy

1. public class UserForm {  
2.     private Map<String, String> userMap = new LinkedHashMap<String, String>();  
3.     private User user = new User();  
4.       
5.     public Map<String, String> getUserMap() {  
6.         return userMap;  
7.     }  
8.     public void setUserMap(Map<String, String> userMap) {  
9.         this.userMap = userMap;  
10.     }  
11.     public User getUser() {  
12.         return user;  
13.     }  
14.     public void setUser(User user) {  
15.         this.user = user;  
16.     }  
17.       
18. }  

 

jsp代码

[xhtml] view plaincopy

1. <form action="test6.do" method="post">  
2.     <div class="f_left">姓名:</div>  
3.     <div class="f_left"><input name="user.name" value="张三"/></div>  
4.     <div class="clear"></div>  
5.     <div class="f_left">年龄:</div>  
6.     <div class="f_left"><input name="user.age" value="20"/></div>  
7.     <div class="clear"></div>  
8.     <div class="f_left">收入:</div>  
9.     <div class="f_left"><input name="user.income" value="100000"/></div>  
10.     <div class="clear"></div>  
11.     <div class="f_left">结婚:</div>  
12.     <div class="f_left">  
13.     <input type="radio" name="user.isMarried" value="true" checked="checked"/>是  
14.     <input type="radio" name="user.isMarried" value="false"/>否</div>  
15.     <div class="clear"></div>  
16.     <div><input type="submit" value="提交表单"/></div>  
17. </form>