为了观察变量方便,我们通常会重写实体类模型的toString方法,可是每一个类都写。有些冗余。
事实上,能够这样子:
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 * @author limenghua * */ public class BaseEntity implements Serializable { private static final long serialVersionUID = 4861363281663993175L; /** * toString * 打印演示样例:[email protected][name=张三, ,amount=500.0, ] */ @Override public String toString() { ToStringBuilder builder = new ToStringBuilder(this); Field[] fields = 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:
public class Account extends BaseModel{……}
或者,我们能够用一种更加简单的方式写基类:
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 * * @author limenghua */ public class BaseModel implements Serializable { private static final long serialVersionUID = 4861363281663993175L; /** * toString * 打印演示样例:[email protected][ * name=张三 * amount=500.0 * ] */ @Override public String toString() { return ToStringBuilder.reflectionToString(this, ToStringStyle.MULTI_LINE_STYLE); } }
打印效果:
时间: 2024-10-29 20:17:22