java获取Object属性类型、属性名称、属性值

 1  package com.jf.ftp;
 2 
 3 import java.lang.reflect.Field;
 4 import java.lang.reflect.Method;
 5 import java.util.ArrayList;
 6 import java.util.HashMap;
 7 import java.util.List;
 8 import java.util.Map;
 9 
10 import org.apache.log4j.Logger;
11 
12 public class ObjectUtil {
13 
14     private static Logger log = Logger.getLogger(NewFtpUtil.class);
15     
16     /**
17     * 根据属性名获取属性值
18     * */
19     private Object getFieldValueByName(String fieldName, Object o) {
20         try {
21             String firstLetter = fieldName.substring(0, 1).toUpperCase();
22             String getter = "get" + firstLetter + fieldName.substring(1);
23             Method method = o.getClass().getMethod(getter, new Class[] {});
24             Object value = method.invoke(o, new Object[] {});
25             return value;
26         } catch (Exception e) {
27             log.error(e.getMessage(), e);
28             return null;
29         }
30     }
31     
32     /**
33     * 获取属性名数组
34     * */
35     private String[] getFiledName(Object o) {
36         Field[] fields = o.getClass().getDeclaredFields();
37         String[] fieldNames = new String[fields.length];
38         for (int i = 0; i < fields.length; i++) {
39             System.out.println(fields[i].getType());
40             fieldNames[i] = fields[i].getName();
41         }
42         return fieldNames;
43     }
44     
45     /**
46     * 获取属性类型(type)，属性名(name)，属性值(value)的map组成的list
47     * */
48     private List getFiledsInfo(Object o) {
49         Field[] fields = o.getClass().getDeclaredFields();
50         String[] fieldNames = new String[fields.length];
51         List list = new ArrayList();
52         Map infoMap = null;
53         for (int i = 0; i < fields.length; i++) {
54             infoMap = new HashMap();
55             infoMap.put("type", fields[i].getType().toString());
56             infoMap.put("name", fields[i].getName());
57             infoMap.put("value", getFieldValueByName(fields[i].getName(), o));
58             list.add(infoMap);
59         }
60         return list;
61     }
62     
63     /**
64     * 获取对象的所有属性值，返回一个对象数组
65     * */
66     public Object[] getFiledValues(Object o) {
67         String[] fieldNames = this.getFiledName(o);
68         Object[] value = new Object[fieldNames.length];
69         for (int i = 0; i < fieldNames.length; i++) {
70             value[i] = this.getFieldValueByName(fieldNames[i], o);
71         }
72         return value;
73     }
74 }