Dbutis
package cn.lining.test;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
import org.apache.commons.dbutils.DbUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.ArrayHandler;
import org.apache.commons.dbutils.handlers.ArrayListHandler;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.apache.commons.dbutils.handlers.ColumnListHandler;
import org.apache.commons.dbutils.handlers.KeyedHandler;
import org.apache.commons.dbutils.handlers.MapHandler;
import org.apache.commons.dbutils.handlers.MapListHandler;
import org.apache.commons.dbutils.handlers.ScalarHandler;
publicclass test {
@SuppressWarnings("unchecked")
publicstaticvoid main(String[] args) throws ClassNotFoundException {
UserField userField = new UserField();
Connection conn = null;
String jdbcURL = "jdbc:mysql://localhost:3306/macaw4";
String jdbcDriver = "com.mysql.jdbc.Driver";
try {
DbUtils.loadDriver(jdbcDriver);
conn = DriverManager.getConnection(jdbcURL, "root", "root");
conn.setAutoCommit(false);//关闭自动提交
QueryRunner qRunner = new QueryRunner();
// 以下部分代码采用MapHandler存储方式查询
System.out.println("***Using MapHandler***");
Map map = (Map) qRunner.query(conn,
"select * from mc_user_field where id = ?",
new MapHandler(), new Object[] { "5" });
System.out.println("id ------------- name ");
System.out.println(map.get("id") + " ------------- "
+ map.get("name"));
// 以下部分代码采用MapListHandler存储方式查询
System.out.println("***Using MapListHandler***");
List lMap = (List) qRunner.query(conn,
"select * from mc_user_field", new MapListHandler());
System.out.println("id ------------- name ");
for (int i = 0; i < lMap.size(); i++) {
Map vals = (Map) lMap.get(i);
System.out.println(vals.get("id") + " ------------- "
+ vals.get("name"));
}
// 以下部分代码采用BeanHandler存储方式查询
System.out.println("***Using BeanHandler***");
userField = (UserField) qRunner.query(conn,
"select * from mc_user_field where id = ?",
new BeanHandler(Class.forName("cn.lining.test.UserField")),
new Object[] { "5" });
System.out.println("id ------------- name ");
System.out.println(userField.getId() + " ------------- "
+ userField.getName());
// 以下部分代码采用BeanListHandler存储方式查询
System.out.println("***Using BeanListHandler***");
List lBean = (List) qRunner.query(conn,
"select * from mc_user_field", new BeanListHandler(Class
.forName("cn.lining.test.UserField")));
System.out.println("id ------------- name ");
for (int i = 0; i < lBean.size(); i++) {
userField = (UserField) lBean.get(i);
System.out.println(userField.getId() + " ------------- "
+ userField.getName());
}
// 以下部分代码采用ArrayHandler存储方式查询
System.out.println("***Using ArrayHandler***");
Object[] array = (Object[]) qRunner.query(conn,
"select * from mc_user_field where id = ?",
new ArrayHandler(), new Object[] { "5" });
System.out.println("id ------------- name ");
System.out.println(array[0].toString() + " ------------- "
+ array[1].toString());
// 以下部分代码采用ArrayListHandler存储方式查询
System.out.println("***Using ArrayListHandler***");
List lArray = (List) qRunner.query(conn,
"select * from mc_user_field", new ArrayListHandler());
System.out.println("id ------------- name ");
for (int i = 0; i < lArray.size(); i++) {
Object[] var = (Object[]) lArray.get(i);
System.out.println(var[0].toString() + " ------------- "
+ var[1].toString());
}
// 以下部分代码采用ColumnListHandler存储方式查询指定列
System.out.println("***Using ColumnListHandler***");
List lName = (List) qRunner.query(conn,
"select * from mc_user_field where id = ?",
new ColumnListHandler("name"), new Object[] { "5" });
System.out.println("name ");
for (int i = 0; i < lName.size(); i++) {
String name = (String) lName.get(i);
System.out.println(name);
}
// 以下部分代码采用ScalarHandler存储方式查询
System.out.println("***Using ScalarHandler***");
String name = (String) qRunner.query(conn,
"select * from mc_user_field where id = ?",
new ScalarHandler("name"), new Object[] { "5" });
System.out.println("name ");
System.out.println(name);
// 以下部分代码采用KeyedHandler存储方式查询
System.out.println("***Using KeyedHandler***");
Map<String, Map> map2 = (Map<String, Map>) qRunner.query(conn,
"select * from mc_user_field", new KeyedHandler("name"));
System.out.println("name: field_name2");
Map vals = (Map) map2.get("field_name2");
System.out.println(vals.get("id") + " " + vals.get("name") + " "
+ vals.get("type"));
// 以下部分代码插入一条数据
System.out.println("***Insert begin***");
userField = new UserField();
qRunner.update(conn, "insert into mc_user_field ("
+ "id,name,type,sort_order,required,visible)"
+ "values (?,?,?,?,?,?)", new Object[] { userField.getId(),
userField.getName(), userField.getType(),
userField.getSort_order(), userField.getRequired(),
userField.getVisible() });
System.out.println("***update end***");
// 以下部分代码更新一条数据
System.out.println("***update begin***");
userField = new UserField();
qRunner.update(conn, "update mc_user_field set "
+ "name = ?,type = ?,sort_order = ?,"
+ "required = ?,visible = ?" + "where id = ?",
new Object[] { userField.getName(), userField.getType(),
userField.getSort_order(), userField.getRequired(),
userField.getVisible(), userField.getId() });
System.out.println("***update end***");
// 以下部分代码删除一条数据
System.out.println("***delete begin***");
userField = new UserField();
qRunner.update(conn, "delete from mc_user_field where id2 = ?",
new Object[] { userField.getId() });
System.out.println("***delete end***");
} catch (SQLException ex) {
ex.printStackTrace();
try {
System.out.println("***rollback begin***");
DbUtils.rollback(conn);
System.out.println("***rollback end***");
} catch (SQLException e) {
e.printStackTrace();
}
} finally {
DbUtils.closeQuietly(conn);
}
}
}
・ ArrayHandler：把结果集中的第一行数据转成对象数组。
・ ArrayListHandler：把结果集中的每一行数据都转成一个对象数组，再存放到List中。
・ BeanHandler：将结果集中的第一行数据封装到一个对应的JavaBean实例中。
・ BeanListHandler：将结果集中的每一行数据都封装到一个对应的JavaBean实例中，存放到List里。
・ ColumnListHandler：将结果集中某一列的数据存放到List中。
・ KeyedHandler：将结果集中的每一行数据都封装到一个Map里，然后再根据指定的key把每个Map再存放到一个Map里。
・ MapHandler：将结果集中的第一行数据封装到一个Map里，key是列名，value就是对应的值。
・ MapListHandler：将结果集中的每一行数据都封装到一个Map里，然后再存放到List。
・ ScalarHandler：将结果集中某一条记录的其中某一列的数据存成Object。