[Java]JAVA获取实体与List 数组的转换

最新推荐文章于 2024-08-18 03:16:36 发布

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最新推荐文章于 2024-08-18 03:16:36 发布

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分类专栏： Java专题文章标签： java list object string bean exception

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本文深入探讨了Java反射API在BeanToArrayServiceBean类中的应用，通过实现获取对象的属性名称和对应的值，进而构建了一个BeanToArray对象。文章详细介绍了类的反射、属性获取与设置的方法，以及如何利用反射API处理复杂的数据结构。

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public class BeanToArray {

 private String[] beanNames;
 private Object[] values;

 public BeanToArray() {
 }

 public BeanToArray(String[] beanNames, Object[] values) {
  this.beanNames = beanNames;
  this.values = values;
 }

 public String[] getBeanNames() {
  return beanNames;
 }

 public void setBeanNames(String[] beanNames) {
  this.beanNames = beanNames;
 }

 public Object[] getValues() {
  return values;
 }

 public void setValues(Object[] values) {
  this.values = values;
 }
}
package com.zl.tzdb.services;

import com.zl.tzdb.entity.base.BeanToArray;

public interface BeanToArrayService {
 public BeanToArray getFieldGenericName(Object bean) ;
}
package com.zl.tzdb.services.impl;

import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.stereotype.Service;

import com.zl.tzdb.entity.base.BeanToArray;
import com.zl.tzdb.services.BeanToArrayService;
@Service
public class BeanToArrayServiceBean implements BeanToArrayService {

 private BeanToArray beanToArray=new BeanToArray();
 public BeanToArray getFieldGenericName(Object bean) {
  Field[] fields = bean.getClass().getDeclaredFields();
  Map<String,Object> m=new HashMap<String,Object>();
  Field.setAccessible(fields, true);
  for (int i = 0; i < fields.length;i++) {
   Field field = fields[i];
   try {
    if(field.get(bean)==null)continue;
    m.put(field.getName(), field.get(bean));
   } catch (Exception e) {
   }
  }
  String beanNames[]=m.keySet().toArray(new String[m.size()]);
  Object[] values = m.values().toArray(new Object[m.size()]);
  for(String s : beanNames){
   System.out.println(s);
  }
  for(Object s : values){
   System.out.println(s);
  }
  beanToArray.setBeanNames(beanNames);
  beanToArray.setValues(values);
  return beanToArray;
 }

}