豆浆and馒头

com.alibaba.fastjson.JSONObject方法1jar包下载地址https://repo1.maven.org/maven2/com/alibaba/fastjson/1.2.62/fastjson-1.2.62.jar方法2pom增加<dependency> <groupId>com.alibaba</groupId>...

col[]数组内为列名 statement = con.createStatement(); ResultSet rs = statement.executeQuery(sql); ResultSetMetaData rsmd = rs.getMetaData();//获得列集 int count=rsmd.getColumnCount(); String[]...

1、在当前调用class中使用以下代码，可查看当前class路径System.out.println(new File(".").getAbsolutePath());本人实验，class文件的实际目录是E:\Tomcat9\webapps\TT\WEB-INF\classes\com\cn\pub在class使用上述代码，获得的结果是E:\Tomcat92、…/表示当前目录的上一级目录...

SQL = “SELECT id as a,url from project_url”ResultSet rs = statement.executeQuery(SQL);ResultSetMetaData rsmd = rs.getMetaData();rsmd.getColumnLabel(0);//结果arsmd.getColumnLabel(1);//结果urlrsmd.get...

增加一行代码response.setContentType(“text/html;charset=utf-8”);

string 和int之间的转换string转换成int :Integer.valueOf(“12”)int转换成string : String.valueOf(12)

import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.PrintWriter;import java.net.URL;import java.net.URLConnection;public class SendPost {...

public String getHttpRespone(String urlstr) throws IOException { String line = ""; String httpResults = ""; //urlstr=("http://172.16.21.38:8082/score/queryScoreById?id=2017...

import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;public class CopyFolder { public void copyFolder(String oldPath, String newPath) { try { new...