java invoke 反射的使用方法

java invoke：动态调用类的方法
这个的例子，用在导入数据的时候，可以灵活的使用。很方便、实用。
1.User.java
view plain
package cvr.vo; 
 
public class User { 
     
    private String username; 
     
    private String password; 
     
    private Integer value1,value2,value3,value4,value5,value6,value7,value8,value9,value10; 
 
    public String getPassword() { 
        return password; 
    } 
 
    public void setPassword(String password) { 
        this.password = password; 
    } 
 
    public String getUsername() { 
        return username; 
    } 
 
    public void setUsername(String username) { 
        this.username = username; 
    } 
 
    public Integer getValue1() { 
        return value1; 
    } 
 
    public void setValue1(Integer value1) { 
        this.value1 = value1; 
    } 
 
    public Integer getValue10() { 
        return value10; 
    } 
 
    public void setValue10(Integer value10) { 
        this.value10 = value10; 
    } 
 
    public Integer getValue2() { 
        return value2; 
    } 
 
    public void setValue2(Integer value2) { 
        this.value2 = value2; 
    } 
 
    public Integer getValue3() { 
        return value3; 
    } 
 
    public void setValue3(Integer value3) { 
        this.value3 = value3; 
    } 
 
    public Integer getValue4() { 
        return value4; 
    } 
 
    public void setValue4(Integer value4) { 
        this.value4 = value4; 
    } 
 
    public Integer getValue5() { 
        return value5; 
    } 
 
    public void setValue5(Integer value5) { 
        this.value5 = value5; 
    } 
 
    public Integer getValue6() { 
        return value6; 
    } 
 
    public void setValue6(Integer value6) { 
        this.value6 = value6; 
    } 
 
    public Integer getValue7() { 
        return value7; 
    } 
 
    public void setValue7(Integer value7) { 
        this.value7 = value7; 
    } 
 
    public Integer getValue8() { 
        return value8; 
    } 
 
    public void setValue8(Integer value8) { 
        this.value8 = value8; 
    } 
 
    public Integer getValue9() { 
        return value9; 
    } 
 
    public void setValue9(Integer value9) { 
        this.value9 = value9; 
    } 
 
} 

2.Go.java
view plain
package cvr.go; 
 
import java.lang.reflect.Method; 
import java.util.ArrayList; 
import java.util.List; 
 
import cvr.vo.User; 
 
public class Go { 
 
    public static void main(String[] args) { 
        int [] vals = new int[]{1,2,3,4,5,6,7,8,9,10}; 
        User user = Go.setUserValues(vals); 
        List list = Go.getUserValues(user); 
        for (int i = 0; i < list.size(); i++) { 
            int j = i+1; 
            System.out.println("value" + j + "=" + list.get(i)); 
        } 
    } 
     
    public static User setUserValues(int [] vals) { 
        User user = new User(); 
        try { 
            //获取Class的对象 
            Class c = user.getClass(); 
            for (int i = 1; i <= 10; i++) { 
                //动态获取方法名 
                String methodName = "setValue"+i; 
                //设置方法的参数 
                Class[] args = new Class[1]; 
                Integer u = new Integer(3); 
                args[0] = u.getClass(); 
                Method method = c.getMethod(methodName, args); 
                //调用方法 
                method.invoke(user, vals[i-1]); 
            } 
        } catch (Exception e) { 
            e.printStackTrace(); 
        } 
        return user; 
    } 
     
    public static List getUserValues(User user) { 
        List list = new ArrayList(); 
        try { 
            Class c = user.getClass(); 
            for (int i = 1; i <= 10; i++) { 
                String methodName = "getValue"+i; 
                Method method = c.getMethod(methodName, null); 
                Integer s = (Integer) method.invoke(user, null); 
                list.add(s); 
            } 
        } catch (Exception e) { 
            e.printStackTrace(); 
        } 
        return list; 
    } 
     
}