数据格式化&验证以及国际化
1.数据格式化
1.1基本介绍
说明:在我们提交数据(比如表单时),SpringMVC 是怎样对提交的数据进行转换和处理的
基本数据类型可以和字符串之间自动进行转换,比如:SpringMVC 上下文中内建了很多转换器,可以完成大多数 java 类型的转换工作。[相互转换,这里只列出部分]
ConversionService converters =
java.lang.Boolean-> java.lang.String:org.springframework.core.convert.support.ObjectToStringConverter@f874ca
java.lang.Character -> java.lang.Number : CharacterToNumberFactory@f004c9
java.lang.Character -> java.lang.String : ObjectToStringConverter@68a961
java.lang.Enum -> java.lang.String : EnumToStringConverter@12f060a
java.lang.Number -> java.lang.Character : NumberToCharacterConverter@1482ac5
java.lang.Number -> java.lang.Number : NumberToNumberConverterFactory@126c6f
java.lang.Number -> java.lang.String : ObjectToStringConverter@14888e8
java.lang.String -> java.lang.Boolean : StringToBooleanConverter@1ca6626
java.lang.String -> java.lang.Character : StringToCharacterConverter@1143800
java.lang.String -> java.lang.Enum : StringToEnumConverterFactory@1bba86e
java.lang.String -> java.lang.Number : StringToNumberConverterFactory@18d2c12
java.lang.String -> java.util.Locale : StringToLocaleConverter@3598e1
java.lang.String -> java.util.Properties : StringToPropertiesConverter@c90828
java.lang.String -> java.util.UUID : StringToUUIDConverter@a42f23
java.util.Locale -> java.lang.String : ObjectToStringConverter@c7e20a
java.util.Properties -> java.lang.String : PropertiesToStringConverter@367a7f
java.util.UUID -> java.lang.String : ObjectToStringConverter@112b07f
……
1.2基本数据类型和字符串自动转换
应用实例:基本数据类型可以和字符串之间自动地完成转换
(1)Monster.java
package com.li.web.datavalid.entity;
/**
* @author 李
* @version 1.0
*/
public class Monster {
private Integer id;
private String email;
private Integer age;
private String name;
public Monster() {}
public Monster(Integer id, String email, Integer age, String name) {
this.id = id;
this.email = email;
this.age = age;
this.name = name;
}
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
@Override
public String toString() {
return "Monster{" +
"id=" + id +
", email='" + email + '\'' +
", age=" + age +
", name='" + name + '\'' +
'}';
}
}
(2)data_valid.jsp:
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>SpringMVC[数据格式/验证等]</title>
</head>
<body>
<h1>SpringMVC[数据格式/验证等]</h1>
<hr/>
<a href="<%=request.getContextPath()%>/addMonsterUI">添加妖怪</a>
</body>
</html>
(3)MonsterHandler.java
package com.li.web.datavalid;
import com.li.web.datavalid.entity.Monster;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMa