Code highlighting produced by Actipro CodeHighlighter (freeware)

http://www.CodeHighlighter.com/





public class ColumnBean{

  private String columnName;

  private int columnType;



  //......getter/setter



  public void setColumnType(int type) throws IllegalArgumentException{

    //在这里我想校验传入的类型是否正确，请问如何做？

  }

}



//正常情况下用户应这样调用

new ColumnBean().setColumnType(java.sql.Types.INTEGER);//正确的设置

//假如非正常的呢？

new ColumnBean().setColumnType(5000);//故意错误的设置

Code highlighting produced by Actipro CodeHighlighter (freeware)

http://www.CodeHighlighter.com/







package test;



import java.lang.reflect.Field;

import java.util.ArrayList;

import java.util.List;



public class ColumnBean1 {



    private String columnName;



    private String columnType;



    // ......getter/setter



    public boolean setColumnType(String type) throws IllegalArgumentException, ClassNotFoundException {



        if (type.equalsIgnoreCase("int"))

            type = "Integer";

        type = type.toUpperCase();

        Class c = Class.forName("java.sql.Types");

        Field[] f = c.getDeclaredFields();

        List<String> list = new ArrayList<String>();

        for (Field f1 : f) {

            list.add(f1.getName());

        }

        if (list.contains(type))

            return true;

        else

            return false;

    }



    public static void main(String[] args) throws IllegalArgumentException, ClassNotFoundException {

        System.out.println(new ColumnBean1().setColumnType("int"));

        System.out.println(new ColumnBean1().setColumnType("int22"));

        System.out.println(new ColumnBean1().setColumnType("char"));

    }

}