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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.Connection;
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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 javabean.Base;
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import javabean.Util;
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@WebServlet("/admin/sortDel")
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public class SortDel 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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// ！！！！！ 默认1为未分类
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String defaultId = "1";
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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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// 准备数据
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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 = "";
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// 准备返回数据
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int code = 1;
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String msg = "";
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try {
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// 不能删除未分类
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if(defaultId.equals(id)) {
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msg = "不能删除未分类";
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}else {
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connection = (Connection) Base.getConnection();
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// 分类下的文章修改
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sql = "update books set sort_id=? where sort_id=?";
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pstmt = connection.prepareStatement(sql);
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pstmt.setString(1, defaultId);
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pstmt.setString(2, id);
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result = pstmt.executeUpdate();
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// 进行删除
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sql = "delete from book_sort where id=?";
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pstmt = connection.prepareStatement(sql);
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pstmt.setString(1, id);
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result = pstmt.executeUpdate();
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if(result == 1) {
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code = 0;
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msg = "删除成功";
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}else {
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msg = "删除失败";
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}
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}
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} catch (ClassNotFoundException e) {
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msg = "classnotfound";
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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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PrintWriter out = resp.getWriter();
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out.print(Util.jsonResponse(code, msg, null));
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}
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}
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