mybiz.java

DWR 3级联动代码 基于DWR 的整合 是一个不错的例子

package com.zhangwei.biz;

import java.util.List;

import com.zhangwei.db.DBUtils;

public class MyBiz {

	public List getCities(Integer parentid) {
		StringBuilder sql = new StringBuilder(
				"select * from cities where parentid ");
		if (parentid == null) {
			sql.append(" is ? ");
		} else {
			sql.append(" = ?");
		}
		System.out.println("values is "+parentid);
		return DBUtils.getInstance().list(sql.toString(), parentid);
	}
}