方法:
public static <T> List<T> processResultSetToList(ResultSet rs, Class<T> clazz) throws Exception {
List<T> ls = new ArrayList<T>();
Field[] fields = clazz.getDeclaredFields();
while (rs.next()) {
T tt = clazz.newInstance();
for (Field field : fields) {
try {
/**
* 如果Oracle数据库中的类型是 number p.getWriteMethod().invoke(tt, new
* Object[] { rs.getObject(p.getName()) }) 会报如下错误
* java.lang.IllegalArgumentException: argument type
* mismatch --- 另外如果mysql数据库中的bigint 在进行setXxxx(Integer
* val)时候也会抛出该异常 也会抛出该异常
*/
Object value = null;
try {
String fieldName = getColumnName(field);
switch (TypeUtils.getMappedType(field)) {
case Long:
value = Long.valueOf(rs.getLong(fieldName));
break;
case Integer:
value = Integer.valueOf(rs.getInt(fieldName));
break;
case Double:
value = Double.valueOf(rs.getDouble(fieldName));
break;
case Byte:
InputStream ins = rs.getBinaryStream(fieldName);
if(ins != null){
value = IOUtils.toByteArray(ins);
}
break;
case Date:
/**
* 15-12-8
* 转为util.Date
*/
Timestamp t = rs.getTimestamp(fieldName);
if(t!=null){
value = new Date(t.getTime());
}
break;
default:
value = rs.getObject(fieldName);
break;
}
} catch (Exception e) {// 如果仅仅查询Class的部分字段
if (e.getMessage().matches("Column\\s+'.+?'\\s+not\\s+found.")) {
switch (TypeUtils.getMappedType(field)) {
case Long:
case Integer:
value = 0;
break;
default:
value = null;
break;
}
}
}
field.setAccessible(true);
if(value != null){
field.set(tt, value);
}
} catch (IllegalArgumentException e) {
e.printStackTrace();
}
}
ls.add(tt);
}
DBUtils.close(rs, null, null);
return ls;
}