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  • Spring MVC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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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 plaincopyprint?
    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>  

     

     转自 http://blog.csdn.net/lxf9601/article/details/5925810
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  • 原文地址：https://www.cnblogs.com/xd502djj/p/3245485.html
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