使用beanUtils操纵javabean

浏览数：20 / 时间：2015年06月08日

Sun公司的内省API过于繁琐，所以Apache组织结合很多实际开发中的应用场景开发了一套简单、易用的API操作Bean的属性——BeanUtils，在Beanutil中可以直接进行类型的自动转换。

BeanUtil工具包下载：

1，登录http://commons.apache.org/beanutils/

2, 点击Download

3, 点击commons-beanutils-1.9.2-bin.zip（commons-logging-1.1.3-src）进行下载就OK了

使用BeanUtil

在项目中导入commons-beanutils-1.9.2.jar包即可(PS:把此jar包复制到项目的lib文件夹，右击包，选build path==>add to build path 显示奶瓶即可)

另外：commons-beanutils-1.9.2.jar 要与 commons-logging-1.1.3.Jar共用。

  1 import java.lang.reflect.InvocationTargetException;
  2 import java.text.ParseException;
  3 import java.text.SimpleDateFormat;
  4 import java.util.Date;
  5 import java.util.HashMap;
  6 import java.util.Map;
  7 
  8 import org.apache.commons.beanutils.BeanUtils;
  9 import org.apache.commons.beanutils.ConversionException;
 10 import org.apache.commons.beanutils.ConvertUtils;
 11 import org.apache.commons.beanutils.Converter;
 12 import org.apache.commons.beanutils.locale.converters.DateLocaleConverter;
 13 import org.junit.Test;
 14 
 15 
 16 
 17 //使用beanUtils操纵bean属性（第三方）
 18 public class Demo {
 19 
 20     /**
 21      * 
 22      * @throws Exception 
 23      *
 24      */
 25     @Test
 26     public void test1() throws  Exception{
 27         
 28         Person p = new Person();
 29         
 30         BeanUtils.setProperty(p, "name", "zero");
 31         
 32         System.out.println(p.getName());
 33         
 34     }
 35     
 36     @Test
 37     public void test2() throws  Exception{
 38         
 39         String name = "aaaa";
 40         String password = "123";
 41         String age = "34";
 42         
 43         Person p = new Person();
 44         
 45         BeanUtils.setProperty(p, "name", name);//只支持8种基本数据类型
 46         BeanUtils.setProperty(p, "password", password);
 47         BeanUtils.setProperty(p, "age", age);
 48         
 49         System.out.println(p.getName()+"*"+p.getPassword()+"*"+p.getAge());
 50         
 51     }
 52     
 53     @Test
 54     public void test3() throws  Exception{
 55         
 56         String name = "aaaa";
 57         String password = "123";
 58         String age = "34";
 59         String birthday = "1900-1-1";
 60         
 61         //为了让日期赋到bean的birthday属性上，给beanUtils注册一个日期转换
 62         ConvertUtils.register(new Converter(){
 63 
 64             @Override
 65             public Object convert(Class type, Object value) {
 66                 
 67                 if(value==null){
 68                     return null;
 69                 }
 70                 if(!(value instanceof String)){
 71                     throw new ConversionException("only support String");
 72                 }
 73                 
 74                 String str = (String) value;
 75                 
 76                 if(str.trim().equals("")){
 77                     return null;
 78                 }
 79                 
 80                 SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");
 81                 
 82                 try {
 83                     return df.parse(str);
 84                 } catch (ParseException e) {
 85                     throw new RuntimeException(e);
 86                 }
 87                 
 88             }
 89             
 90         },Date.class);
 91         
 92         Person p = new Person();
 93         
 94         BeanUtils.setProperty(p, "name", name);//只支持8种基本数据类型
 95         BeanUtils.setProperty(p, "password", password);
 96         BeanUtils.setProperty(p, "age", age);
 97         BeanUtils.setProperty(p, "birthday", birthday);
 98         
 99         System.out.println(p.getName()+"*"+p.getPassword()+"*"+p.getAge()+"*"+p.getBirthday());
100         
101     }
102     
103     @Test
104     public void test4() throws  Exception{
105         
106         String name = "aaaa";
107         String password = "123";
108         String age = "34";
109         String birthday = "1998-1-1";
110         
111         ConvertUtils.register(new DateLocaleConverter(), Date.class);
112         
113         Person p = new Person();
114         
115         BeanUtils.setProperty(p, "name", name);//只支持8种基本数据类型
116         BeanUtils.setProperty(p, "password", password);
117         BeanUtils.setProperty(p, "age", age);
118         BeanUtils.setProperty(p, "birthday", birthday);
119         
120         Date date = p.getBirthday();
121         
122         System.out.println(p.getName()+"*"+p.getPassword()+"*"+p.getAge()+"*"+date.toLocaleString());
123         
124     }
125     
126     @Test
127     public void test5() throws Exception{
128         
129         Map map = new HashMap();
130         map.put("name", "zero");
131         map.put("password", "521212");
132         map.put("age", "33");
133         map.put("birthday", "1998-1-1");
134         
135         ConvertUtils.register(new DateLocaleConverter(), Date.class);
136  
137         Person p = new Person();
138         
139         BeanUtils.populate(p, map);//用map集合的值，填充bean的属性值
140         
141         System.out.println(p.getName()+"*"+p.getPassword()+"*"+p.getAge()+"*"+p.getBirthday());
142 
143     }
144     
145 }

View Code

 1 import java.util.Date;
 2 
 3 
 4 public class Person {// javabean
 5 
 6     private String name;
 7     private String password;
 8     private int age;
 9     private Date birthday;
10 
11     public Date getBirthday() {
12         return birthday;
13     }
14 
15     public void setBirthday(Date birthday) {
16         this.birthday = birthday;
17     }
18 
19     public String getName() {
20         return name;
21     }
22 
23     public void setName(String name) {
24         this.name = name;
25     }
26 
27     public String getPassword() {
28         return password;
29     }
30 
31     public void setPassword(String password) {
32         this.password = password;
33     }
34 
35     public int getAge() {
36         return age;
37     }
38 
39     public void setAge(int age) {
40         this.age = age;
41     }
42     
43     public String getAb(){
44         return null;
45     }
46 
47 
48 }