JAVA中把ResultSet转换成LIST

项目中老是遇到数据库异常关闭的情况,真烦,
想用hibernate呢,那个玩意儿又太笨重,感慨C#和PHP的舒适方便性,模拟TP写了个数据处理层,将就用着先
代码里有很多项目中的东西,不要直接COPY了。。。了解实现方法就行了

/**
* @模拟TP数据操作基类框架 * @author 牛牛 Q 184377367 * @20131218 */ package Model; import java.lang.reflect.Method; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.SQLException; import java.util.ArrayList; import java.util.List; import xqlbsw.DB; import xqlbsw.DataFactory; import lib.DBC; public class ModelBase { public String table; public DBC db = null; public String where = ""; public String Field = ""; public Boolean Delete() throws Exception { String dbChar = "delete " + this.table + " where " + this.where; DataFactory.GDO().Update(dbChar); DataFactory.GDO().free(); return true; } public ModelBase table(String t) { this.table = t; return this; } public ModelBase Field(String s) { this.Field = s; return this; } public ModelBase Where(String s) { this.where = s; return this; } public List Select() throws SQLException { if (this.Field == "") { this.Field = "*"; } String dbChar = "select " + this.Field + " from " + this.table; if (this.where != "") { dbChar += " where " + this.where + ""; } List list = this.toList(DataFactory.GDO().getCrmResult(dbChar)); DataFactory.GDO().free(); return list; } public List toList(ResultSet rs) { List list = new ArrayList(); try { // 获取数据库表结构 ResultSetMetaData meta = rs.getMetaData(); Object obj = null; String clsName = this.getClass().getName(); String aryClassName[] = clsName.split("\\."); while (rs.next()) { // 获取formbean实例对象 obj = Class.forName( "Domain." + aryClassName[(aryClassName.length) - 1]) .newInstance(); // 循环获取指定行的每一列的信息 for (int i = 1; i <= meta.getColumnCount(); i++) { // 当前列名 String colName = meta.getColumnName(i); // 将列名第一个字母大写(为什么加+""呢?为了把char类型转换为String类型。replace的参数是String类型。) colName = colName.replace(colName.charAt(0) + "", new String(colName.charAt(0) + "").toUpperCase()); // 设置方法名 String methodName = "set" + colName; // 获取当前位置的值,返回Object类型 Object value = rs.getObject(i); // 利用反射机制,生成setXX()方法的Method对象并执行该setXX()方法。 Method method = obj.getClass().getMethod(methodName, value.getClass()); method.invoke(obj, value); } list.add(obj); } } catch (Exception ex) { ex.printStackTrace(); } finally { return list; } } }

 

posted @ 2014-01-20 15:45  方东信  阅读(3616)  评论(0编辑  收藏  举报