java 读写 xlsx

所需要依赖的jar包
<dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <!-- for ftp -->
        <dependency>
            <groupId>commons-net</groupId>
            <artifactId>commons-net</artifactId>
            <version>3.6</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.12</version>
        </dependency>
        <!-- for 新浪抓取使用，但是和selenium需要的版本冲突 2.44selenium自带为4.3.4httplient -->
<!--         <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.2</version>
        </dependency> -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.4</version>
        </dependency>
        <dependency>
            <groupId>net.sf.json-lib</groupId>
            <artifactId>json-lib</artifactId>
            <version>2.4</version>
            <classifier>jdk15</classifier>
        </dependency>
    <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.8</version>
        </dependency>
        <dependency>    
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.9</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.9</version>
        </dependency>
        <dependency>
              <groupId>org.seleniumhq.selenium</groupId>
              <artifactId>selenium-java</artifactId>
           <version>2.48.0</version>
        </dependency>
        
        <!-- for use selenium and poi -->
         <dependency>
            <groupId>xml-apis</groupId>
            <artifactId>xml-apis</artifactId>
            <version>1.4.01</version>
        </dependency>
       <!--Excal  -->
         <dependency>    
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.9</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.9</version>
        </dependency>
        <dependency>
            <groupId>dom4j</groupId>
            <artifactId>dom4j</artifactId>
            <version>1.6</version>
        </dependency>
        
        <dependency>
            <groupId>net.sourceforge.jexcelapi</groupId>
            <artifactId>jxl</artifactId>
            <version>2.6.12</version>
        </dependency> 
        
        <dependency>  
    <groupId>org.apache.poi</groupId>  
    <artifactId>poi</artifactId>  
    <version>3.14</version>  
</dependency>  
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->  
<!-- <dependency>  
    <groupId>org.apache.poi</groupId>  
    <artifactId>poi-ooxml</artifactId>  
    <version>3.14</version>  
</dependency> --> 
    </dependencies>

package cn.iie.icm.xlsx;


import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.util.Properties;

public class ServerConfig {
            private static final String PROPERTY_PATH = "/server.properties";
         
            private Properties props = new Properties();
            public ServerConfig(){
                loadConfig();
            }
            public void loadConfig(){
                 InputStream in = null;
                    try{
                    in = ServerConfig.class.getResourceAsStream(PROPERTY_PATH);
//                    props.load(in);
                    props.load(new InputStreamReader(in, "UTF-8"));   //for chinese 
                    }catch(Exception ex){
                        ex.printStackTrace();
                    }finally{
                        if(in!=null){
                            try{
                                in.close();
                            }catch(Exception ex){
                                ex.printStackTrace();
                            }
                        }
                    }
            }
            public void saveConfig(String adminid,String passwd){
                OutputStream os = null;
                try{
                    String fileName = ServerConfig.class.getClassLoader().getResource(PROPERTY_PATH).getFile();
                    os = new FileOutputStream(new File(fileName));
                    props.clear();
                    props.setProperty("username", adminid);
                    props.setProperty("password", passwd);
                    props.store(os, "");
                    os.flush();
                }catch(Exception ex){
                    ex.printStackTrace();
                }finally{
                    if(os!=null){
                        try {
                            os.close();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                }
            }
            public String getAdminId(){
                return this.props.getProperty("username");
            }
            public String getAdminPwd(){
                return this.props.getProperty("password");
            }
            public Properties getProps(){
                return props;
            }
            
            public String getProp(String key){
                return props.getProperty(key);
            }
            
            public boolean containsKey(String key){
                return props.containsKey(key);
            }
}