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69373b2e26
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9f4aba210b
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package javabean;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import com.mysql.jdbc.Connection;
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public class TestConnection {
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public static void main(String[] args) throws ClassNotFoundException, SQLException {
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// 获取rule
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Connection connection = null;
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PreparedStatement pstmt = null;
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ResultSet resultSet = null;
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int result = 0;
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String password = "1234";
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String reader = "1234";
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String rule_id = "1";
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String status = "1";
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connection = (Connection) Base.getConnection();
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String sql = "insert into borrow_card(password, reader, rule_id, status) values(?,?,?,?)";
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pstmt = connection.prepareStatement(sql);
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pstmt.setString(1, password);
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pstmt.setString(2, reader);
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pstmt.setString(3, rule_id);
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pstmt.setString(4, status);
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result = pstmt.executeUpdate();
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System.out.println(result);
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//获取id
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//connection1= (Connection) Base.getConnection();
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String findIdSql = "select id from borrow_card where password=? and reader=? and rule_id=? and status=? limit 1";
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pstmt = connection.prepareStatement(findIdSql);
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pstmt.setString(1, password);
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pstmt.setString(2, reader);
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pstmt.setString(3, rule_id);
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pstmt.setString(4, status);
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// pstmt1 = connection.prepareStatement(findIdSql);
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// pstmt1.setString(1, password);
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// pstmt1.setString(2, reader);
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// pstmt1.setString(3, rule_id);
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// pstmt1.setString(4, status);
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resultSet = pstmt.executeQuery();
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while(resultSet.next()) {
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System.out.println(resultSet.getString("id"));
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}
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}
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}
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@ -1,29 +0,0 @@
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package servlet;
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import java.io.IOException;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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/**
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* Servlet implementation class ServletExample
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*/
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public class ServletExample extends HttpServlet {
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private static final long serialVersionUID = 1L;
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public ServletExample() {
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}
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protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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response.getWriter().append("Served at: ").append(request.getContextPath());
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}
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protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
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doGet(request, response);
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}
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}
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@ -1,45 +0,0 @@
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package servlet;
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import java.io.IOException;
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import javax.servlet.ServletException;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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/**
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* Servlet implementation class Test
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*/
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public class Test extends HttpServlet {
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private static final long serialVersionUID = 1L;
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/**
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* @see HttpServlet#HttpServlet()
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*/
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public Test() {
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super();
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// TODO Auto-generated constructor stub
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}
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/**
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* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
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* response)
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*/
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protected void doGet(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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// TODO Auto-generated method stub
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response.getWriter().append("Served at:ddd ").append(request.getContextPath());
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}
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/**
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* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
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* response)
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*/
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protected void doPost(HttpServletRequest request, HttpServletResponse response)
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throws ServletException, IOException {
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// TODO Auto-generated method stub
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doGet(request, response);
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}
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}
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package servlet.admin;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.sql.PreparedStatement;
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import java.sql.SQLException;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import com.mysql.jdbc.Connection;
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import javabean.Base;
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import net.sf.json.JSONArray;
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import net.sf.json.JSONObject;
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@WebServlet("/admin/cardDel")
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public class CardDel extends HttpServlet {
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@Override
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protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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resp.setContentType("application/json; charset=utf8");
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// 接收数据
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String id = req.getParameter("id");
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// 处理数据
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Connection connection = null;
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PreparedStatement delCardPstmt = null;
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PreparedStatement delHistoryPstmt = null;
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String delCardSql = null;
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String delHistorySql = null;
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int delCardResult = 0;
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int delHistoryResult = 0;
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// 返回数据
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String code = "1";
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String msg = "error";
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JSONObject jsonObject = new JSONObject();
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JSONObject jsonData = new JSONObject();
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// 开始处理
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if(id != null && !id.equals("")) {
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try {
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// 公共连接
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connection = (Connection) Base.getConnection();
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// 删除借书记录
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delHistorySql = "delete from borrow_books where card_id=?";
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delHistoryPstmt = connection.prepareStatement(delHistorySql);
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delHistoryPstmt.setString(1, id);
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delHistoryResult = delHistoryPstmt.executeUpdate();
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// 返回删除记录条数
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jsonData.put("num", delHistoryResult);
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// 删除阅读证
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delCardSql = "delete from borrow_card where id=? limit 1";
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delCardPstmt = connection.prepareStatement(delCardSql);
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delCardPstmt.setString(1, id);
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delCardResult = delCardPstmt.executeUpdate();
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} catch (ClassNotFoundException e) {
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msg = "连接失败";
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} catch (SQLException e) {
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msg = "sql错误";
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} finally {
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try {
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delCardPstmt.close();
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Base.closeResource(connection, delCardPstmt, null);
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} catch (SQLException e) {
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msg = "关闭失败";
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}
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}
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}
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PrintWriter out = resp.getWriter();
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if(delCardResult == 1) {
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code = "0";
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msg = "删除借阅证成功";
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}
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jsonObject.put("code", code);
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jsonObject.put("msg", msg);
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jsonObject.put("data", jsonData);
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out.print(jsonObject.toString());
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}
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}
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package servlet.admin;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.sql.PreparedStatement;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import javax.servlet.ServletException;
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import javax.servlet.annotation.WebServlet;
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import javax.servlet.http.HttpServlet;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import com.mysql.jdbc.Connection;
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import javabean.Base;
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import net.sf.json.JSONObject;
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@WebServlet("/admin/cardEdit")
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public class CardEdit extends HttpServlet {
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@Override
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protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
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resp.setContentType("application/json; charset=utf8");
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// 接受数据
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String id = req.getParameter("id");
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String password = req.getParameter("password");
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String reader = req.getParameter("reader");
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String rule_id = req.getParameter("rule_id");
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String status = req.getParameter("status");
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// 准备资源
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Connection connection = null;
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PreparedStatement pstmt = null;
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ResultSet resultSet = null;
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int result = 0;
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String sql = null;
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// 返回数据
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String code = "1";
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String msg = "error";
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JSONObject json = new JSONObject();
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PrintWriter out = resp.getWriter();
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// 判断数据
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if(id == null || password == null || reader == null || reader == null || status == null ||
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id.equals("") || password.equals("") || reader.equals("") || rule_id.equals("") || status.equals("")) {
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code = "1";
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msg = "参数不能为空";
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}else {
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sql = "update borrow_card set password=?, reader=?, rule_id=?, status=? where id=?";
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try {
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connection = (Connection) Base.getConnection();
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pstmt = connection.prepareStatement(sql);
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pstmt.setString(1, password);
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pstmt.setString(2, reader);
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pstmt.setString(3, rule_id);
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pstmt.setString(4, status);
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pstmt.setString(5, id);
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result = pstmt.executeUpdate();
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} catch (ClassNotFoundException e1) {
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msg = "错误";
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} catch (SQLException e) {
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msg = "sql错误";
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} finally {
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try {
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Base.closeResource(connection, pstmt, resultSet);
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} catch (SQLException e) {
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msg = "关闭失败";
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}
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}
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if(result == 1) {
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code = "0";
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msg = "修改成功";
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}
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json.put("code", code);
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json.put("msg", msg);
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out.print(json.toString());
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}
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}
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}
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