1.[代码]JavaBean小工具而已，还是挺方便的，你能懂得。

package com.cnlive.util;

import java.lang.reflect.Field;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.sql.ResultSetMetaData;

import java.text.SimpleDateFormat;

import java.util.ArrayList;

import java.util.List;

import java.util.logging.Logger;

import javax.sql.rowset.CachedRowSet;

public class BeanUtil {

private static Logger LOG = Logger.getLogger(Logger.class.getName());

/**

* 通过Bean对象获取查询语句

* @param obj 对象

* @param tableName 表名

* @return SQL

*/

public static String getSQLOfSelect(Object obj,String tableName) {

StringBuffer strBuffer = new StringBuffer("SELECT ") ;

Class extends Object> objClass = obj.getClass();

Field fields[] = objClass.getDeclaredFields();

for (Field field:fields) {

String methodName = field.getName().substring(0,1).toUpperCase() + field.getName().substring(1);

try {

if(null != objClass.getMethod("get"+methodName)){

strBuffer.append(field.getName()+",") ;

}

} catch (SecurityException e) {

e.printStackTrace();

} catch (NoSuchMethodException e) {

e.printStackTrace();

}

}

strBuffer.delete(strBuffer.length()-1, strBuffer.length());

strBuffer.append(" FROM "+ tableName);

LOG.info(strBuffer.toString());

return null;

}

/**

* 通过bean对象获取插入时的SQL

* @param obj java对象

* @param tableName 表名

* @return SQL

*/

public static String getSQLOfInsert(Object obj,String tableName) {

String strSQL = new String("INSERT INTO "+ tableName + "(#COLS) VALUES (#VALS)") ;

Class extends Object> objClass = obj.getClass();

Field fields[] = objClass.getDeclaredFields();

StringBuffer cols = new StringBuffer("") ;

StringBuffer values = new StringBuffer("");

for (Field field:fields) {

String methodName = "get"+ field.getName().substring(0,1).toUpperCase() + field.getName().substring(1);

try {

Method method = objClass.getMethod(methodName);

Object o = method.invoke(obj);

if(null != o){

cols.append(field.getName()+",") ;

if(o instanceof Integer || o instanceof Long || o instanceof Double){

values.append(o.toString() + ",");

}else if(o instanceof String){

values.append("'"+ o +"',");

}else if(o instanceof java.util.Date){

String datestr = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format((java.util.Date)o);

values.append("'"+ datestr +"',");

}else {

values.append("'"+ o.toString() +"',");

}

}

} catch (SecurityException e) {

e.printStackTrace();

continue;

} catch (NoSuchMethodException e) {

e.printStackTrace();

continue;

} catch (IllegalArgumentException e) {

e.printStackTrace();

} catch (IllegalAccessException e) {

e.printStackTrace();

} catch (InvocationTargetException e) {

e.printStackTrace();

}

}

if(cols.length()>1 && values.length()>1){

cols.delete(cols.length()-1, cols.length());

values.delete(values.length()-1, values.length());

strSQL = strSQL.replace("#COLS", cols).replace("#VALS", values);

}else{

LOG.warning("警告：空对象无法完成操作啊");

return null ;

}

LOG.info(strSQL);

return strSQL;

}

/**

* 通过缓存结果集构造对象列表

* @param clazz javaBean类

* @param crs缓存结果集

* @return 对象列表

*/

public static List getBeanFormCacheRowSet(Class> clazz, CachedRowSet crs){

List result = new ArrayList();

try {

ResultSetMetaData md = crs.getMetaData();

int columnCount = md.getColumnCount();

Object o = null;

while (crs.next()) {

o = clazz.newInstance();

for (int i = 1; i <= columnCount; i++) {

if(crs.getObject(i) == null){

continue ;

}

md.getColumnType(i);

String className = md.getColumnClassName(i);

if("java.sql.Timestamp".equals(className) || "java.sql.Date".equals(className)){

className = "java.util.Date" ;

}else if("java.sql.Time".equals(className)){

className = "java.lang.String" ;

}else if("java.lang.Byte".equals(className) || "java.lang.Short".equals(className)){

className = "java.lang.Integer" ;

}

String methodName = "set"+md.getColumnName(i).substring(0,1).toUpperCase() + md.getColumnName(i).substring(1);

try{

clazz.getMethod(methodName,Class.forName(className)).invoke(o, crs.getObject(i));

}catch(NoSuchMethodException e){

LOG.warning("特殊类型字段导致表字段与JavaBean属性不对应！没有找到参数类型是["+className +"]的SETER方法："+ methodName);

continue;

}

//System.out.println("className : " + className +" \tmethodName : " + methodName);

}

result.add(o);

}

}catch(Exception e){

e.printStackTrace();

}

return result;

}

}