Beanutils Use Cases

1. beanutils framework/tool (developed by Apache open-source organization)
(1) The beanutils framework can complete all functions of internal provinces and optimize
(2) The beanutils framework can automatically convert the string <-> basic types (that is, the conversion of the eight basic types)
(3) beanutils framework custom converter:
Convertutils. Register (Conversion rule, class of the target object)
(4) registering a custom converter with the beanutils framework must be placed before the bu. setproperty () code.
(5) use the beanutils built-in string-> date converter:

Convertutils. Register (New datelocaleconverter (), java. util. Date. Class );

(6) Two jar packages to be used:
Commons-beanutils-1.8.0.jar and commons-logging.jar

Copy the two packages to myeclipse or eclipse and place the cursor over the jar package, right-click and choose "build path" --> "add to build path" to use these two jar packages in the Code (and the code will only prompt)

2. Code exercises:

Student code (student. Java ):

Package CN. WWH. www. java. beanutils;


Import java. util. date;


/**
* Function of the class: Special Note: The birthday is written, while the birthday is still used in beanutils. At this time, the program cannot pass,
* If the value of D in getbirthday and setbirthday is changed, the system runs successfully. As mentioned earlier, the framework is related to setxxx and getxxx, but not to private date birthay;
*
*
* @ Author
* @ Version 1.0
* @ Creation Time: 11:49:19
*/
Public class student {


Private string name;
Private int age;
Private date birthday;

Public student (){
System. Out. println ("constructor ");
}
/**
* @ Return the name
*/
Public String getname (){
Return name;
}
/**
* @ Param name the name to set
*/
Public void setname (string name ){
This. Name = Name;
}
/**
* @ Return the age
*/
Public int getage (){
Return age;
}
/**
* @ Param age the age to set
*/
Public void setage (INT age ){
This. Age = age;
}
/**
* @ Return the birthday
*/
Public date getbirthday (){
Return birthday;
}
/**
* @ Param birthday the birthday to set
*/
Public void setbirthday (date birthday ){
This. Birthday = birthday;
}

}

Beanutils test code (demo1.java ):

Package CN. WWH. www. java. beanutils;


Import java. Lang. Reflect. invocationtargetexception;
Import java. Text. parseexception;
Import java. Text. simpledateformat;
Import java. util. date;
Import org. Apache. commons. beanutils. beanutils;
Import org. Apache. commons. beanutils. convertutils;
Import org. Apache. commons. beanutils. converter;
Import org. Apache. commons. beanutils. locale. converters. datelocaleconverter;
Import org. JUnit. test;


/**
* Function of the class: Because beanutil can only convert eight basic types. If you want to convert other types,
* You need to define the conversion method. For example, you want to convert the date type.
*
*
* @ Author
* @ Version 1.0
* @ Creation Time: 11:49:07
*/
Public class demo {


// Customize a type converter (format the output of string ----> date)
@ Test
Public void testdemo1 () throws exception {
Student = new student ();
Beanutils bu = new beanutils ();

// Register
Convertutils. Register (New converter (){
@ Override
Public object convert (class calzz, object type ){
/**
* Parameter 1: Class, java. uitl. date; (target type) parameter 2: input parameter type, java. Lang. String;
*/
String strbirthday = (string) type;
Simpledateformat SDF = new simpledateformat ("yyyy-mm-dd ");


Try {
Return SDF. parse (strbirthday );
} Catch (parseexception e ){
// Todo auto-generated Catch Block
E. printstacktrace ();
Return NULL;
}
}
}, Date. Class );


Bu. setproperty (student, "name", "");
Bu. setproperty (student, "Age", "22 ");
Bu. setproperty (student, "Birthday", "2014-07-22 ");


// Retrieve data
String name = Bu. getproperty (student, "name ");
String age = Bu. getproperty (student, "Age ");
String Birthday = Bu. getproperty (student, "Birthday ");


System. Out. println ("name:" + name + "\ Nage:" + age + "\ nbirthday :"
+ New date (birthday). tolocalestring ());


/*
* Output result: Constructor
* Name: ye Binzhou
* Age: 22
* Birthday: 14:00:00 (I have not modified the time, it is related to the source code call in it)
*/


}
@ Test
Public void testdemo2 () throws exception {
Student = new student ();
Beanutils bu = new beanutils ();

Convertutils. Register (New datelocaleconverter (), java. util. Date. Class );



Bu. setproperty (student, "name", "");
Bu. setproperty (student, "Age", "22 ");
Bu. setproperty (student, "Birthday", "2014-07-22 ");


// Retrieve data
String name = Bu. getproperty (student, "name ");
String age = Bu. getproperty (student, "Age ");
String Birthday = Bu. getproperty (student, "Birthday ");


System. Out. println ("name:" + name + "\ Nage:" + age + "\ nbirthday :"
+ New date (birthday). tolocalestring ());


}
}

Code test:

Beanutils Use Cases