Servlet-config.properteis资源文件读取操作

Posted 2020-10-31

java文件

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Properties;

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class Emaldome4 extends HttpServlet {

    public void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        // 利用ServletContext对象加载src/config.properteis资源文件
        ServletContext context = this.getServletContext();
        InputStream is = context.getResourceAsStream("/res/config.properties");
        Properties props = new Properties();
        props.load(is);
        // System.out.println(props.getProperty("email"));

        int rows = Integer.parseInt(props.getProperty("row"));
        int cols = Integer.parseInt(props.getProperty("col"));

        System.out.println("row:" + props.getProperty("rows"));
        System.out.println("col: " + props.getProperty("cols"));

        PrintWriter pw = response.getWriter();
        pw.write("<table border=‘1‘ align=‘center‘>");
        for (int i = 0; i < rows; i++) {
            if (i % 2 == 0) {// 偶数行
                pw.write("<tr style=‘color:red‘>");
            } else {// 奇数行
                pw.write("<tr style=‘color:blue‘>");
            }
            for (int j = 0; j < cols; j++) {
                pw.write("<td>");
                pw.write("&#x25C7;");
                pw.write("</td>");
            }
            pw.write("</tr>");
        }
        pw.write("</table>");
    }

}