ResultSet转为bean
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.sql.CallableStatement;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import javax.swing.JApplet;
public class hf {
public static void main(String[] args) {
String driver = "oracle.jdbc.driver.OracleDriver";
String strUrl = "jdbc:oracle:thin:@192.168.1.65:1521:XINLIORA";
Statement stmt = null;
ResultSet rs = null;
Connection conn = null;
try {
Class.forName(driver);
conn = DriverManager.getConnection(strUrl, "info", "123456");
CallableStatement proc = null;
// proc = conn
// .prepareCall("{ call p_page.pagerecordscount(?,?) }");
// proc.setString(1, "t_information");
// proc.registerOutParameter(2, oracle.jdbc.OracleTypes.NUMBER);
// proc.execute();
// Long countLong = proc.getLong(2);
// System.out.println(countLong);
/**
* Pindex in number, --分页索引 第几页 以0开始为第一页 Psize in number, --页面大小
* 1页显示多少行 Psql in varchar2, --产生dataset的sql语句 查询1页数据的sql
* allCountsql in varchar2, --查询总行数的语句 allCount out number, --总行数
* Pcount out number, --返回分页总数 v_cur2 out type_cur2 --返回当前页数据记录
*/
proc = conn
.prepareCall("{ call p_page2.pagination2(?,?,?,?,?,?,?)}");
proc.setString(1, "2");
proc.setString(2, "5");
proc.setString(3, "select * from (select a.*,rownum row_num from "
+ "(select * from t_information t where adduserid=1 "
+ "order by t.inserttime desc ) a) ");
proc.setString(4, " t_information t where adduserid=1");
proc.registerOutParameter(5, oracle.jdbc.OracleTypes.NUMBER);
proc.registerOutParameter(6, oracle.jdbc.OracleTypes.NUMBER);
proc.registerOutParameter(7, oracle.jdbc.OracleTypes.CURSOR);
proc.execute();
Long rowCount = proc.getLong(5);
Long pageCount = proc.getLong(6);
System.out.println("总行数:" + rowCount + ",总页数:" + pageCount);
rs = (ResultSet) proc.getObject(7);
hf hf = new hf();
if (rs != null) {
Collection collection = hf.resultSetToBean(rs,
TInformation.class);//TInformation 转换的目标对象
for (Iterator it = collection.iterator(); it.hasNext();) {
TInformation ltest = (TInformation) it.next();
System.out.println(ltest.getId() + ":" + ltest.getTopic()
+ "," + ltest.getInserttime());
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 将ResultSet中的数据转换为一个javabean并放到一个集合中
*
* @param result
* ResultSet数据 源数据
* @param clazz
* 转换的目标对象
* @return 存放目标对象的集合
*/
public Collection resultSetToBean(final ResultSet result, final Class clazz) {
// 创建collection
Collection collection = null;
try {
ResultSetMetaData rsmd = result.getMetaData();
// 获得数据列数
int cols = rsmd.getColumnCount();
// 创建等同数据列数的arraylist类型collection实例
collection = new ArrayList(cols);
// 遍历结果集
while (result.next()) {
// 创建对象
Object object = null;
try {
// 从class获得对象实体
object = clazz.newInstance();
} catch (Exception e) {
System.out.println("对象转换失败!");
}
// 循环每条记录
for (int i = 1; i <= cols; i++) {
// 设置目标对象的属性
beanRegister(object, rsmd.getColumnName(i), result
.getString(i));
}
// 将数据插入collection
collection.add(object);
}
} catch (SQLException e) {
System.err.println(e.getMessage());
} finally {
}
return collection;
}
/**
* 为bean自动注入属性数据
*
* @param object
* 目标对象
* @param beanProperty
* 属性名称
* @param value
* 属性的值
*/
private void beanRegister(Object object, String beanProperty, String value) {
// 如果查询出来的列在目标对象中并没有则要筛选
if (beanProperty.toLowerCase().equals("row_num")) {
return;
}
// 为属性生成setter、getter方法
Object[] beanObject = this.beanMatch(object.getClass(), beanProperty);
Object[] cache = new Object[1];
Method getter = (Method) beanObject[0];
Method setter = (Method) beanObject[1];
try {
// 通过get获得方法类型，匹配类型并赋值
String methodType = getter.getReturnType().getName();
if (value != null && !value.equals("")) {
if (methodType.equalsIgnoreCase("java.lang.Long")) {
cache[0] = new Long(value);
setter.invoke(object, cache);
} else if (methodType.equalsIgnoreCase("java.lang.Int")
|| methodType.equalsIgnoreCase("java.lang.Integer")) {
cache[0] = new Integer(value);
setter.invoke(object, cache);
} else if (methodType.equalsIgnoreCase("java.lang.Short")) {
cache[0] = new Short(value);
setter.invoke(object, cache);
} else if (methodType.equalsIgnoreCase("java.lang.Float")) {
cache[0] = new Float(value);
setter.invoke(object, cache);
} else if (methodType.equalsIgnoreCase("java.lang.Double")) {
cache[0] = new Double(value);
setter.invoke(object, cache);
} else if (methodType.equalsIgnoreCase("java.lang.Boolean")) {
cache[0] = new Boolean(value);
setter.invoke(object, cache);
} else if (methodType.equalsIgnoreCase("java.util.Date")) {
SimpleDateFormat sdft = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
cache[0] = sdft.parse(value);
setter.invoke(object, cache);
} else if (methodType.equalsIgnoreCase("java.lang.String")) {
cache[0] = value;
setter.invoke(object, cache);
} else if (methodType.equalsIgnoreCase("java.io.InputStream")) {
} else if (methodType.equalsIgnoreCase("char")) {
cache[0] = (Character.valueOf(value.charAt(0)));
setter.invoke(object, cache);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* 匹配指定class中数据,并返回包含get和set方法的object,生成属性的setter、getter方法
*
* @param clazz
* 目标对象
* @param beanProperty
* 属性名称
* @return
*/
private Object[] beanMatch(Class clazz, String beanProperty) {
Object[] result = new Object[2];// 生成setter、getter
beanProperty = beanProperty.toLowerCase();// 先转为小写
char beanPropertyChars[] = beanProperty.toCharArray();
beanPropertyChars[0] = Character.toUpperCase(beanPropertyChars[0]);// 首字母大写
String s = new String(beanPropertyChars);
String names[] = { ("get" + s).intern(), ("set" + s).intern() };
Method getter = null;
Method setter = null;
Method methods[] = clazz.getMethods();
for (int i = 0; i < methods.length; i++) {
Method method = methods[i];
// 只取公共字段
if (!Modifier.isPublic(method.getModifiers()))
continue;
String methodName = method.getName().intern();
for (int j = 0; j < names.length; j++) {
String name = names[j];
if (!name.equals(methodName))
continue;
if (methodName.startsWith("set"))
setter = method;
else
getter = method;
}
}
result[0] = getter;
result[1] = setter;
return result;
}
}