Spring MVC數據綁定大全 .

本文轉載自：https://www.cnblogs.com/xd502djj/archive/2013/08/08/3245485.html 作者：xd502djj 轉載請註明該聲明。

剛開始用spring mvc 做web開發時,經常會不知道如何合適綁定頁面數據.用慣struts2的朋友更認爲spring mvc 綁定數據不如struts2方便(本人最開始也是這麼認爲),經過一段時間的應用和測試,總結出以下幾種情況,希望對剛接觸spring mvc 的朋友有所幫助.

示例程序下載

查看spring源碼可以看出spring支持轉換的數據類型已經很多了.

org.springframework.beans.PropertyEditorRegistrySupport.java

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/**
* Actually register the default editors for this registry instance.
*/
private void doRegisterDefaultEditors() {
this.defaultEditors = new HashMap<Class, PropertyEditor>(64);
// Simple editors, without parameterization capabilities.
// The JDK does not contain a default editor for any of these target types.
this.defaultEditors.put(Charset.class, new CharsetEditor());
this.defaultEditors.put(Class.class, new ClassEditor());
this.defaultEditors.put(Class[].class, new ClassArrayEditor());
this.defaultEditors.put(Currency.class, new CurrencyEditor());
this.defaultEditors.put(File.class, new FileEditor());
this.defaultEditors.put(InputStream.class, new InputStreamEditor());
this.defaultEditors.put(Locale.class, new LocaleEditor());
this.defaultEditors.put(Pattern.class, new PatternEditor());
this.defaultEditors.put(Properties.class, new PropertiesEditor());
this.defaultEditors.put(Resource[].class, new ResourceArrayPropertyEditor());
this.defaultEditors.put(TimeZone.class, new TimeZoneEditor());
this.defaultEditors.put(URI.class, new URIEditor());
this.defaultEditors.put(URL.class, new URLEditor());
// Default instances of collection editors.
// Can be overridden by registering custom instances of those as custom editors.
this.defaultEditors.put(Collection.class, new CustomCollectionEditor(Collection.class));
this.defaultEditors.put(Set.class, new CustomCollectionEditor(Set.class));
this.defaultEditors.put(SortedSet.class, new CustomCollectionEditor(SortedSet.class));
this.defaultEditors.put(List.class, new CustomCollectionEditor(List.class));
this.defaultEditors.put(SortedMap.class, new CustomMapEditor(SortedMap.class));
// Default editors for primitive arrays.
this.defaultEditors.put(byte[].class, new ByteArrayPropertyEditor());
this.defaultEditors.put(char[].class, new CharArrayPropertyEditor());
// The JDK does not contain a default editor for char!
this.defaultEditors.put(char.class, new CharacterEditor(false));
this.defaultEditors.put(Character.class, new CharacterEditor(true));
// Spring's CustomBooleanEditor accepts more flag values than the JDK's default editor.
this.defaultEditors.put(boolean.class, new CustomBooleanEditor(false));
this.defaultEditors.put(Boolean.class, new CustomBooleanEditor(true));
// The JDK does not contain default editors for number wrapper types!
// Override JDK primitive number editors with our own CustomNumberEditor.
this.defaultEditors.put(byte.class, new CustomNumberEditor(Byte.class, false));
this.defaultEditors.put(Byte.class, new CustomNumberEditor(Byte.class, true));
this.defaultEditors.put(short.class, new CustomNumberEditor(Short.class, false));
this.defaultEditors.put(Short.class, new CustomNumberEditor(Short.class, true));
this.defaultEditors.put(int.class, new CustomNumberEditor(Integer.class, false));
this.defaultEditors.put(Integer.class, new CustomNumberEditor(Integer.class, true));
this.defaultEditors.put(long.class, new CustomNumberEditor(Long.class, false));
this.defaultEditors.put(Long.class, new CustomNumberEditor(Long.class, true));
this.defaultEditors.put(float.class, new CustomNumberEditor(Float.class, false));
this.defaultEditors.put(Float.class, new CustomNumberEditor(Float.class, true));
this.defaultEditors.put(double.class, new CustomNumberEditor(Double.class, false));
this.defaultEditors.put(Double.class, new CustomNumberEditor(Double.class, true));
this.defaultEditors.put(BigDecimal.class, new CustomNumberEditor(BigDecimal.class, true));
this.defaultEditors.put(BigInteger.class, new CustomNumberEditor(BigInteger.class, true));
// Only register config value editors if explicitly requested.
if (this.configValueEditorsActive) {
StringArrayPropertyEditor sae = new StringArrayPropertyEditor();
this.defaultEditors.put(String[].class, sae);
this.defaultEditors.put(short[].class, sae);
this.defaultEditors.put(int[].class, sae);
this.defaultEditors.put(long[].class, sae);
}
}

/** * Actually register the default editors for this registry instance. */ private void doRegisterDefaultEditors() { this.defaultEditors = new HashMap<Class, PropertyEditor>(64); // Simple editors, without parameterization capabilities. // The JDK does not contain a default editor for any of these target types. this.defaultEditors.put(Charset.class, new CharsetEditor()); this.defaultEditors.put(Class.class, new ClassEditor()); this.defaultEditors.put(Class[].class, new ClassArrayEditor()); this.defaultEditors.put(Currency.class, new CurrencyEditor()); this.defaultEditors.put(File.class, new FileEditor()); this.defaultEditors.put(InputStream.class, new InputStreamEditor()); this.defaultEditors.put(Locale.class, new LocaleEditor()); this.defaultEditors.put(Pattern.class, new PatternEditor()); this.defaultEditors.put(Properties.class, new PropertiesEditor()); this.defaultEditors.put(Resource[].class, new ResourceArrayPropertyEditor()); this.defaultEditors.put(TimeZone.class, new TimeZoneEditor()); this.defaultEditors.put(URI.class, new URIEditor()); this.defaultEditors.put(URL.class, new URLEditor()); // Default instances of collection editors. // Can be overridden by registering custom instances of those as custom editors. this.defaultEditors.put(Collection.class, new CustomCollectionEditor(Collection.class)); this.defaultEditors.put(Set.class, new CustomCollectionEditor(Set.class)); this.defaultEditors.put(SortedSet.class, new CustomCollectionEditor(SortedSet.class)); this.defaultEditors.put(List.class, new CustomCollectionEditor(List.class)); this.defaultEditors.put(SortedMap.class, new CustomMapEditor(SortedMap.class)); // Default editors for primitive arrays. this.defaultEditors.put(byte[].class, new ByteArrayPropertyEditor()); this.defaultEditors.put(char[].class, new CharArrayPropertyEditor()); // The JDK does not contain a default editor for char! this.defaultEditors.put(char.class, new CharacterEditor(false)); this.defaultEditors.put(Character.class, new CharacterEditor(true)); // Spring's CustomBooleanEditor accepts more flag values than the JDK's default editor. this.defaultEditors.put(boolean.class, new CustomBooleanEditor(false)); this.defaultEditors.put(Boolean.class, new CustomBooleanEditor(true)); // The JDK does not contain default editors for number wrapper types! // Override JDK primitive number editors with our own CustomNumberEditor. this.defaultEditors.put(byte.class, new CustomNumberEditor(Byte.class, false)); this.defaultEditors.put(Byte.class, new CustomNumberEditor(Byte.class, true)); this.defaultEditors.put(short.class, new CustomNumberEditor(Short.class, false)); this.defaultEditors.put(Short.class, new CustomNumberEditor(Short.class, true)); this.defaultEditors.put(int.class, new CustomNumberEditor(Integer.class, false)); this.defaultEditors.put(Integer.class, new CustomNumberEditor(Integer.class, true)); this.defaultEditors.put(long.class, new CustomNumberEditor(Long.class, false)); this.defaultEditors.put(Long.class, new CustomNumberEditor(Long.class, true)); this.defaultEditors.put(float.class, new CustomNumberEditor(Float.class, false)); this.defaultEditors.put(Float.class, new CustomNumberEditor(Float.class, true)); this.defaultEditors.put(double.class, new CustomNumberEditor(Double.class, false)); this.defaultEditors.put(Double.class, new CustomNumberEditor(Double.class, true)); this.defaultEditors.put(BigDecimal.class, new CustomNumberEditor(BigDecimal.class, true)); this.defaultEditors.put(BigInteger.class, new CustomNumberEditor(BigInteger.class, true)); // Only register config value editors if explicitly requested. if (this.configValueEditorsActive) { StringArrayPropertyEditor sae = new StringArrayPropertyEditor(); this.defaultEditors.put(String[].class, sae); this.defaultEditors.put(short[].class, sae); this.defaultEditors.put(int[].class, sae); this.defaultEditors.put(long[].class, sae); } }

1.基本數據類型

很簡單,該怎麼寫就怎麼寫.

controller代碼

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@RequestMapping
public void test1(String name, Integer age, Double income, Boolean isMarried, String[] interests)
{
System.out.println("簡單數據類型綁定=========");
System.out.println("名字:" + name);
System.out.println("年齡:" + age);
System.out.println("收入:" + income);
System.out.println("已結婚:" + isMarried);
System.out.println("興趣:");
for (String interest : interests)
{
System.out.println(interest);
}
System.out.println("====================");
}

@RequestMapping public void test1(String name, Integer age, Double income, Boolean isMarried, String[] interests) { System.out.println("簡單數據類型綁定========="); System.out.println("名字:" + name); System.out.println("年齡:" + age); System.out.println("收入:" + income); System.out.println("已結婚:" + isMarried); System.out.println("興趣:"); for (String interest : interests) { System.out.println(interest); } System.out.println("===================="); }

jsp代碼

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<form action="test1.do" method="post">
<div class="f_left">姓名:</div>
<div class="f_left"><input name="name" value="張三"/></div>
<div class="clear"></div>
<div class="f_left">年齡:</div>
<div class="f_left"><input name="age" value="20"/></div>
<div class="clear"></div>
<div class="f_left">收入:</div>
<div class="f_left"><input name="income" value="100000"/></div>
<div class="clear"></div>
<div class="f_left">結婚:</div>
<div class="f_left">
<input type="radio" name="isMarried" value="true" checked="checked"/>是
<input type="radio" name="isMarried" value="false"/>否</div>
<div class="clear"></div>
<div class="f_left">興趣:</div>
<div class="f_left">
<input type="checkbox" name="interests" value="聽歌" checked="checked"/>聽歌
<input type="checkbox" name="interests" value="書法" checked="checked"/>書法
<input type="checkbox" name="interests" value="看電影" checked="checked"/>看電影
</div>
<div class="clear"></div>
<div><input type="submit" value="提交表單"/></div>
</form>

2.簡單對象類型

與基本類型相擬,只不過綁定到對象上更加簡潔.(類擬struts的ActionForm)

controller代碼

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@RequestMapping
public void test2(User user)
{
System.out.println("簡單對象類型綁定=========");
System.out.println("名字:" + user.getName());
System.out.println("年齡:" + user.getAge());
System.out.println("收入:" + user.getIncome());
System.out.println("已結婚:" + user.getIsMarried());
System.out.println("========================");
}

@RequestMapping public void test2(User user) { System.out.println("簡單對象類型綁定========="); System.out.println("名字:" + user.getName()); System.out.println("年齡:" + user.getAge()); System.out.println("收入:" + user.getIncome()); System.out.println("已結婚:" + user.getIsMarried()); System.out.println("========================"); }

user代碼

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public class User {
private String name;
private Integer age;
private Boolean isMarried;
private Double income;
private String[] interests;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public Boolean getIsMarried() {
return isMarried;
}
public void setIsMarried(Boolean isMarried) {
this.isMarried = isMarried;
}
public Double getIncome() {
return income;
}
public void setIncome(Double income) {
this.income = income;
}
public String[] getInterests() {
return interests;
}
public void setInterests(String[] interests) {
this.interests = interests;
}
}

public class User { private String name; private Integer age; private Boolean isMarried; private Double income; private String[] interests; public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } public Boolean getIsMarried() { return isMarried; } public void setIsMarried(Boolean isMarried) { this.isMarried = isMarried; } public Double getIncome() { return income; } public void setIncome(Double income) { this.income = income; } public String[] getInterests() { return interests; } public void setInterests(String[] interests) { this.interests = interests; } }

jsp代碼

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<form action="test2.do" method="post">
<div class="f_left">姓名:</div>
<div class="f_left"><input name="name" value="lxf"/></div>
<div class="clear"></div>
<div class="f_left">年齡:</div>
<div class="f_left"><input name="age" value="20"/></div>
<div class="clear"></div>
<div class="f_left">收入:</div>
<div class="f_left"><input name="income" value="100000"/></div>
<div class="clear"></div>
<div class="f_left">結婚:</div>
<div class="f_left">
<input type="radio" name="isMarried" value="true" checked="checked"/>是
<input type="radio" name="isMarried" value="false"/>否</div>
<div class="clear"></div>
<div class="f_left">興趣:</div>
<div class="f_left">
<input type="checkbox" name="interests" value="聽歌" checked="checked"/>聽歌
<input type="checkbox" name="interests" value="書法" checked="checked"/>書法
<input type="checkbox" name="interests" value="看電影" checked="checked"/>看電影
</div>
<div class="clear"></div>
<div><input type="submit" value="提交表單"/></div>
</form>

3.List類型綁定

網上很多人都給不出答案,關鍵在於,List需要綁定在對象(ActionForm),直接寫在request-mapping函數的參數是不行的,更重要的一點是要創建對象(ArrayList).

controller代碼

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@RequestMapping
public void test3(Club club)
{
System.out.println("list類型綁定=========");
System.out.println("會員:");
for (User user : club.getUsers())
{
System.out.println(user.getName());
}
System.out.println("========================");
}

@RequestMapping public void test3(Club club) { System.out.println("list類型綁定========="); System.out.println("會員:"); for (User user : club.getUsers()) { System.out.println(user.getName()); } System.out.println("========================"); }

Club代碼

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public class Club {
private List<User> users = new ArrayList<User>();
public List<User> getUsers() {
return users;
}
public void setUsers(List<User> users) {
this.users = users;
}
}

public class Club { private List<User> users = new ArrayList<User>(); public List<User> getUsers() { return users; } public void setUsers(List<User> users) { this.users = users; } }

jsp代碼

[xhtml] view plain copy print ?

<form action="test3.do" method="post">
<div class="f_left">會員1號:</div>
<div class="f_left">
<input name="users[0].name" value="張三"/>
</div>
<div class="clear"></div>
<div class="f_left">會員2號:</div>
<div class="f_left">
<input name="users[1].name" value="李四"/>
</div>
<div class="clear"></div>
<div class="f_left">會員3號:</div>
<div class="f_left">
<input name="users[2].name" value="王五"/>
</div>
<div class="clear"></div>
<div><input type="submit" value="提交表單"/></div>
</form>

4.Set類型綁定

與List類型相似,經測試表明,綁定Set數據時,必須先在Set對象中Add相應的數量的模型對象.

controller代碼

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@RequestMapping
public void test4(Club2 club)
{
System.out.println("set類型綁定=========");
System.out.println("會員:");
for (User user : club.getUsers())
{
System.out.println(user.getName());
}
System.out.println("========================");
}

@RequestMapping public void test4(Club2 club) { System.out.println("set類型綁定========="); System.out.println("會員:"); for (User user : club.getUsers()) { System.out.println(user.getName()); } System.out.println("========================"); }
Club2代碼

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public class Club2 {
private Set<User> users = new LinkedHashSet<User>();
public Club2() {
users.add(new User());
users.add(new User());
users.add(new User());
}
public Set<User> getUsers() {
return users;
}
public void setUsers(Set<User> users) {
this.users = users;
}
}

public class Club2 { private Set<User> users = new LinkedHashSet<User>(); public Club2() { users.add(new User()); users.add(new User()); users.add(new User()); } public Set<User> getUsers() { return users; } public void setUsers(Set<User> users) { this.users = users; } }

jsp代碼

[xhtml] view plain copy print ?

<form action="test4.do" method="post">
<div class="f_left">會員1號:</div>
<div class="f_left">
<input name="users[0].name" value="張三"/>
</div>
<div class="clear"></div>
<div class="f_left">會員2號:</div>
<div class="f_left">
<input name="users[1].name" value="李四"/>
</div>
<div class="clear"></div>
<div class="f_left">會員3號:</div>
<div class="f_left">
<input name="users[2].name" value="王五"/>
</div>
<div class="clear"></div>
<div><input type="submit" value="提交表單"/></div>
</form>

5.Map類型綁定

最靈活的一種方式,可無限綁定未定義的參數,注意必須綁定在對象下(ActionForm).

controller代碼

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@RequestMapping
public void test5(UserForm userForm)
{
System.out.println("Map類型綁定=========");
System.out.println("名字:" + userForm.getUser().get("name"));
System.out.println("年齡:" + userForm.getUser().get("age"));
System.out.println("收入:" + userForm.getUser().get("income"));
System.out.println("已結婚:" + userForm.getUser().get("isMarried"));
System.out.println("========================");
}

@RequestMapping public void test5(UserForm userForm) { System.out.println("Map類型綁定========="); System.out.println("名字:" + userForm.getUser().get("name")); System.out.println("年齡:" + userForm.getUser().get("age")); System.out.println("收入:" + userForm.getUser().get("income")); System.out.println("已結婚:" + userForm.getUser().get("isMarried")); System.out.println("========================"); }

UserForm.java代碼

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public class UserForm {
private Map<String, String> userMap = new LinkedHashMap<String, String>();
private User user = new User();
public Map<String, String> getUserMap() {
return userMap;
}
public void setUserMap(Map<String, String> userMap) {
this.userMap = userMap;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
}

public class UserForm { private Map<String, String> userMap = new LinkedHashMap<String, String>(); private User user = new User(); public Map<String, String> getUserMap() { return userMap; } public void setUserMap(Map<String, String> userMap) { this.userMap = userMap; } public User getUser() { return user; } public void setUser(User user) { this.user = user; } }

jsp代碼

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<form action="test5.do" method="post">
<div class="f_left">姓名:</div>
<div class="f_left"><input name="user['name']" value="張三"/></div>
<div class="clear"></div>
<div class="f_left">年齡:</div>
<div class="f_left"><input name="user['age']" value="20"/></div>
<div class="clear"></div>
<div class="f_left">收入:</div>
<div class="f_left"><input name="user['income']" value="100000"/></div>
<div class="clear"></div>
<div class="f_left">結婚:</div>
<div class="f_left">
<input type="radio" name="user['isMarried']" value="true" checked="checked"/>是
<input type="radio" name="user['isMarried']" value="false"/>否</div>
<div class="clear"></div>
<div><input type="submit" value="提交表單"/></div>
</form>

6.複合類型綁定

controller代碼

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@RequestMapping
public void test6(UserForm userForm)
{
System.out.println("複合類型綁定=========");
System.out.println("名字:" + userForm.getUser().getName());
System.out.println("年齡:" + userForm.getUser().getAge());
System.out.println("收入:" + userForm.getUser().getIncome());
System.out.println("已結婚:" + userForm.getUser().getIsMarried());
System.out.println("========================");
}

@RequestMapping public void test6(UserForm userForm) { System.out.println("複合類型綁定========="); System.out.println("名字:" + userForm.getUser().getName()); System.out.println("年齡:" + userForm.getUser().getAge()); System.out.println("收入:" + userForm.getUser().getIncome()); System.out.println("已結婚:" + userForm.getUser().getIsMarried()); System.out.println("========================"); }

UserForm代碼

[java] view plain copy print ?