Java 中如何过滤 Excel 文件
现有Excel文件emp.xlsx，部分数据如下：
EID |
NAME |
SURNAME |
GENDER |
STATE |
BIRTHDAY |
HIREDATE |
DEPT |
SALARY |
1 |
Rebecca |
Moore |
F |
California |
1974-11-20 |
2005-03-11 |
R&D |
7000 |
2 |
Ashley |
Wilson |
F |
New York |
1980-07-19 |
2008-03-16 |
Finance |
11000 |
3 |
Rachel |
Johnson |
F |
New Mexico |
1970-12-17 |
2010-12-01 |
Sales |
9000 |
4 |
Emily |
Smith |
F |
Texas |
1985-03-07 |
2006-08-15 |
HR |
7000 |
5 |
Ashley |
Smith |
F |
Texas |
1975-05-13 |
2004-07-30 |
R&D |
16000 |
6 |
Matthew |
Johnson |
M |
California |
1984-07-07 |
2005-07-07 |
Sales |
11000 |
7 |
Alexis |
Smith |
F |
Illinois |
1972-08-16 |
2002-08-16 |
Sales |
9000 |
8 |
Megan |
Wilson |
F |
California |
1979-04-19 |
1984-04-19 |
Marketing |
11000 |
9 |
Victoria |
Davis |
F |
Texas |
1983-12-07 |
2009-12-07 |
HR |
3000 |
10 |
Ryan |
Johnson |
M |
Pennsylvania |
1976-03-12 |
2006-03-12 |
R&D |
13000 |
需要在Java中过滤工资小于10000的员工信息，结果如下：
借助集算器可以很方便地完成这件事。
集算器安装包可去润乾网站下载集算器职场版，运行时需要一个授权，免费版本就够用。
在JAVA 程序中使用集算器，可以直接执行语句：
public static void test() {
Connection con = null;
Statement st;
try {
Class.forName("com.esproc.jdbc.InternalDriver");
con = DriverManager.getConnection("jdbc:esproc:local://");
st = con.createStatement();
ResultSet rs = st.executeQuery("=file(\"emp.xlsx\").xlsimport@t().select(SALARY<10000)");
// 简单处理结果集，将结果集中的字段名与数据输出
ResultSetMetaData rsmd = rs.getMetaData();
int colCount = rsmd.getColumnCount();
for (int c = 1; c <= colCount; c++) {
String title = rsmd.getColumnName(c);
if (c > 1) {
System.out.print("\t");
} else {
System.out.print("\n");
}
System.out.print(title);
}
while (rs.next()) {
for (int c = 1; c <= colCount; c++) {
if (c > 1) {
System.out.print("\t");
} else {
System.out.print("\n");
}
Object o = rs.getObject(c);
System.out.print(o.toString());
}
}
} catch (Exception e) {
System.out.println(e);
} finally {
// 关闭连接
if (con != null) {
try {
con.close();
} catch (Exception e) {
System.out.println(e);
}
}
}
}
集算器与 JAVA 集成的进一步信息可参考：《Java 如何调用 SPL 脚本》。
英文版