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268 lines (237 loc) · 7.68 KB
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package com.feeyo.util;
import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import org.apache.commons.beanutils.BeanUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class DaoUtil {
private final static Logger LOGGER = LoggerFactory.getLogger(DaoUtil.class);
//将查询结果封装成bean
private static <T> T autoBean(Class<T> clazz, ResultSet rs)
throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, InstantiationException {
T bean = clazz.newInstance();
try {
ResultSetMetaData rsmd = rs.getMetaData();
int columCount = rsmd.getColumnCount();
for (int i = 1; i <= columCount; i++) {
String columName = rsmd.getColumnName(i);
Object value = rs.getObject(i);
BeanUtils.setProperty(bean, columName, value);
}
} catch (SQLException e) {
LOGGER.error(e.getMessage());
}
return bean;
}
//将对象转成map
public static Map<String, Object> convertBean(Object bean)
throws IntrospectionException, IllegalArgumentException, IllegalAccessException, InvocationTargetException {
Class<? extends Object> type = bean.getClass();
Map<String, Object> map = new HashMap<String, Object>();
BeanInfo beanInfo = Introspector.getBeanInfo(type);
PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
for (int i = 0; i < propertyDescriptors.length; i++) {
PropertyDescriptor descriptor = propertyDescriptors[i];
String propertyName = descriptor.getName();
if (!propertyName.equals("class")) {
Method readMethod = descriptor.getReadMethod();
Object result = readMethod.invoke(bean, new Object[0]);
if (result != null) {
map.put(propertyName, result);
} else {
map.put(propertyName, "");
}
}
}
return map;
}
//插入数据到数据库
private static boolean insertTableByMap(String tableName, Map<String, Object> params) {
StringBuffer key = new StringBuffer();
StringBuffer value = new StringBuffer();
Iterator<Entry<String, Object>> iter = params.entrySet().iterator();
while (iter.hasNext()) {
Entry<String, Object> element = iter.next();
key.append(element.getKey() + ",");
if (element.getValue() instanceof String) {
String keyValue = ((String) element.getValue()).trim();
if ("".equals(keyValue)) {
keyValue = null;
}
element.setValue(keyValue);
}
if(element.getValue() != null){
if(element.getValue() instanceof java.sql.Date)
value.append("to_date('" + element.getValue()+ "','yyyy-mm-dd'),");
else
value.append("'" + element.getValue() + "',");
}else {//如果key对应的值为null，则不应加在null两端加单引号，否则sql语句是错误的
value.append(element.getValue() + ",");
}
}
key.replace(key.length() - 1, key.length(), "");
value.replace(value.length() - 1, value.length(), "");
StringBuffer sql = new StringBuffer("insert into ");
sql.append(tableName);
sql.append("(").append(key).append(")");
sql.append(" values (").append(value).append(")");
Connection conn = null;
Statement stat = null;
try {
conn = DBUtil.getConnection();
conn.setAutoCommit(false);
stat = conn.createStatement();
int count = stat.executeUpdate(sql.toString());
conn.commit();
if (count < 0) {
return false;
}
} catch (SQLException e) {
if(conn != null) {
try {
conn.rollback();
} catch (SQLException e1) {
LOGGER.error(e1.getMessage());
}
}
LOGGER.error(e.getMessage());
} finally {
DBUtil.close(conn, stat);
}
return true;
}
public static boolean insertValue(String tableName, Object obj) {
try {
Map<String, Object> propertyMap = DaoUtil.convertBean(obj);
return DaoUtil.insertTableByMap(tableName, propertyMap);
} catch (IllegalArgumentException | IllegalAccessException | InvocationTargetException
| IntrospectionException e) {
LOGGER.error(e.getMessage());
}
return false;
}
public static <T> List<T> getTableValues(String tableName, Class<T> clazz) {
List<T> list = new ArrayList<T>();
StringBuffer sql = new StringBuffer();
sql.append("select * from ").append(tableName);
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try {
conn = DBUtil.getConnection();
stmt = conn.createStatement();
rs = stmt.executeQuery(sql.toString());
while (rs.next()) {
T item = DaoUtil.autoBean(clazz, rs);
if (item != null)
list.add(item);
}
} catch (SQLException e) {
DBUtil.close(conn, stmt, rs);
} catch (Exception e) {
LOGGER.error(e.getMessage());
}
return list;
}
public static boolean executeQuery(String sql) {
Connection conn = null;
Statement stat = null;
ResultSet rs = null;
try {
conn = DBUtil.getConnection();
stat = conn.createStatement();
rs = stat.executeQuery(sql);
if(rs.next())
return true;
return false;
} catch (SQLException e) {
throw new RuntimeException(e);
}finally{
DBUtil.close(conn, stat, rs);
}
}
public static boolean execute(String sql) {
Connection conn = null;
Statement stat = null;
ResultSet rs = null;
try {
conn = DBUtil.getConnection();
conn.setAutoCommit(false);
stat = conn.createStatement();
boolean status = stat.execute(sql.toString());
conn.commit();
return status;
} catch (SQLException e) {
throw new RuntimeException(e);
}finally{
DBUtil.close(conn, stat, rs);
}
}
public static <T> List<T> getSqlValues(String sql, Class<T> clazz) {
List<T> list = new ArrayList<T>();
Connection conn = null;
Statement stmt = null;
ResultSet rs = null;
try {
conn = DBUtil.getConnection();
stmt = conn.createStatement();
rs = stmt.executeQuery(sql);
while (rs.next()) {
T item = DaoUtil.autoBean(clazz, rs);
if (item != null)
list.add(item);
}
} catch (SQLException e) {
DBUtil.close(conn, stmt, rs);
} catch (Exception e) {
LOGGER.error(e.getMessage());
}
return list;
}
//批量插入数据到Sqlite数据库
public static void insertBatchTable(String tableName, final List<Map<String,Object>> params) {
if (params.isEmpty()) {
return;
}
Map<String,Object> keyMap = params.get(0);
StringBuffer keyBuf = new StringBuffer();
StringBuffer valueBuf = new StringBuffer();
for(String key : keyMap.keySet())
keyBuf.append(key).append(",");
keyBuf.replace(keyBuf.length() - 1, keyBuf.length(), "");
StringBuffer sql = new StringBuffer("insert into ");
sql.append(tableName);
sql.append("(").append(keyBuf).append(")");
for(Map<String, Object> param :params) {
valueBuf.append(" SELECT ");
for(Object value : param.values()) {
if(value instanceof String)
valueBuf.append("'").append((String)value).append("',");
else if(value instanceof Integer) {
valueBuf.append((int)value).append(",");
}
}
valueBuf.setLength(valueBuf.length() - 1);
valueBuf.append(" UNION ALL ");
}
int index = valueBuf.toString().lastIndexOf("UNION ALL");
valueBuf.setLength(index);
sql.append(valueBuf.toString());
execute(sql.toString());
}
}