利用java反射机制对多属性javabean赋值_JAVA_编程开发_程序员俱乐部

public class ReflectMatch {  

//封装属性      
private Map<String,Field> fieldMap = new HashMap<String,Field();  
//封装属性的set方法
private Map<String,Method> methMap=new HashMap<String,Method>();  

/*c:为赋值对象，
  *values为给属性要赋的值，put('m1',1);put('m2',2),m1、m2等为属性     
  */
public  void setValue(Object c,Map values){  
    try{  
        Field[] fields = c.getClass().getDeclaredFields();  
              
        Method[] methods = c.getClass().getDeclaredMethods();  
                
         for(Field  field : fields){  
            String attri = field.getName();  
            fieldMap.put(attri.toLowerCase(), field);  
            for(Method method : methods){  
                String meth = method.getName();
               //匹配set方法
                if(meth != null   
                     && "set".equals(meth.substring(0, 3))  
                     && Modifier.isPublic(method.getModifiers())  
                     && ("set"+Character.toUpperCase(attri.charAt(0))+attri.substring(1)).equals(meth)){  
                     methodMap.put(attri.toLowerCase(), method);  
                          break;  
                    }  
                }  
            }  
              
         //2、属性赋值  
     for(Iterator it = values.keySet().iterator();it.hasNext();){  
           String name = (String)it.next();  
           String value = (String)values.get(name);  
                  
           if (value == null)  
                continue;  
           value = value.trim();  
           name = name.trim();  
                  
           Field field = fieldMap.get(name.toLowerCase());  
           if(field == null) continue;  
           Method method = methodMap.get(name.toLowerCase());  
                if (method == null) continue;  
                fill(c,field,method,value);  
         }  
              
     }catch(Exception e){  
       e.printStackTrace();  
     }  
  }  
      
    /** 
     * 将字符串值转换为合适的值填充到对象的指定域 
     * @param bean 被填充的java bean 
     * @param field 需要填充的域 
     * @param value 字符串值 
     */ 
    public static void fill(Object bean, Field field, Method method, String value){  
   if (value == null||"null".equalsIgnoreCase(value))
        return;  
 
    try{  
        Object[] oo = new Object[1];  
 
        String type = field.getType().getName();  
 
       if ("java.lang.String".equals(type)){  
             oo[0] = value;  
       }else if ("java.lang.Integer".equals(type)){  
         if (value.length() > 0) oo[0] = Integer.valueOf(value);  
       }else if ("java.lang.Float".equals(type)){  
          if (value.length() > 0) oo[0] = Float.valueOf(value);  
       }else if ("java.lang.Double".equals(type)){  
          if (value.length() > 0) oo[0] = Double.valueOf(value);  
       }else if ("java.math.BigDecimal".equals(type)){  
          if (value.length() > 0) oo[0] = new BigDecimal(value);  
       }else if("java.util.Date".equals(type)){  
          if (value.length() > 0) oo[0] = DateTimeUtil.create(value, "yyyy-mm-dd hh:mi:ss").toDate();  
      }else if("java.sql.Timestamp".equals(type)){  
          if (value.length() > 0) oo[0] = DateTimeUtil.create(value, "yyyy-mm-dd hh:mi:ss").toTimestamp();  
      }else if ("java.lang.Boolean".equals(type)){  
         if (value.length() > 0) oo[0] = Boolean.valueOf(value);  
      }else if("java.lang.Long".equals(type)){  
         if(value.length() > 0) oo[0] = Long.valueOf(value);  
      }  
 
        method.invoke(bean, oo);  
 
       }catch(Exception e){  
            e.printStackTrace();  
       }  
  }  
      
      
}