java如何自己写基类_一个实体类基类实现

为了观察变量方便&＃xff0c;我们通常会重写实体类模型的toString方法&＃xff0c;可是每一个类都写。有些冗余。

事实上&＃xff0c;能够这样子&＃xff1a;

package others;

import java.io.Serializable;

import java.lang.reflect.Field;

import org.apache.commons.lang3.builder.ToStringBuilder;

/**

* 重写toString()的实体类基类

* &＃64;author limenghua

*

*/

public class BaseEntity implements Serializable {

private static final long serialVersionUID &＃61; 4861363281663993175L;

/**

* toString

* 打印演示样例&＃xff1a;synchronizedtest.Account&＃64;768965fb[name&＃61;张三, ,amount&＃61;500.0, ]

*/

&＃64;Override

public String toString() {

ToStringBuilder builder &＃61; new ToStringBuilder(this);

Field[] fields &＃61; this.getClass().getDeclaredFields();

try {

for (Field f : fields) {

f.setAccessible(true);

builder.append(f.getName(), f.get(this)).append("\n");

}

} catch (Exception e) { // Suppress

builder.append("toString builder encounter an error");

}

return builder.toString();

}

}实体类继承这个类就可以&＃xff1a;

public class Account extends BaseModel{……}

或者&＃xff0c;我们能够用一种更加简单的方式写基类&＃xff1a;

import org.apache.commons.lang3.builder.ToStringBuilder;

import org.apache.commons.lang3.builder.ToStringStyle;

import java.io.Serializable;

/**

* 重写toString()的实体类基类

*

* &＃64;author limenghua

*/

public class BaseModel implements Serializable {

private static final long serialVersionUID &＃61; 4861363281663993175L;

/**

* toString

* 打印演示样例&＃xff1a;Account&＃64;768965fb[

* name&＃61;张三

* amount&＃61;500.0

* ]

*/

&＃64;Override

public String toString() {

return ToStringBuilder.reflectionToString(this,

ToStringStyle.MULTI_LINE_STYLE);

}

}

打印效果&＃xff1a;