工具類封裝
阿新 • • 發佈:2021-09-28
package com.coder.util; import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.ObjectMapper; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; import lombok.experimental.Accessors; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.io.PrintWriter; /** * 返回資料封裝 * @author 王令 */ @Data @Accessors(chain = true) @NoArgsConstructor @AllArgsConstructor public class Result { private boolean status; private int code; private String msg; private Object data; private static final String SUCCESS = "success"; private static final String FAIL = "fail"; private static final int SUCCESS_CODE = 0; private static final int FAIL_CODE = 1; public static Result ok(){ return ok(SUCCESS); } public static Result ok(int code){ return ok(code, SUCCESS); } public static Result ok(String msg){ return ok(msg, null); } public static Result ok(Object data){ return ok(SUCCESS, data); } public static Result ok(int code, String msg){ return ok(code, msg, null); } public static Result ok(int code, Object data){ return ok(code, SUCCESS, data); } public static Result ok(String msg, Object data){ return ok(SUCCESS_CODE, msg, data); } public static Result ok(int code, String msg, Object data){ return new Result(true, code, msg, data); } public static Result fail(){ return fail(FAIL_CODE); } public static Result fail(int code){ return fail(code, FAIL); } public static Result fail(String msg){ return fail(FAIL_CODE, msg); } public static Result fail(int code, String msg){ return fail(code, msg, null); } public static Result fail(int code, String msg, Object data){ return new Result(false, code, msg, data); } }
掙錢養媳婦兒^.^package com.coder.util; import cn.hutool.core.util.ObjectUtil; import com.alibaba.druid.pool.DruidDataSourceFactory; import javax.sql.DataSource; import java.io.IOException; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.List; import java.util.Properties; /** * 德魯伊工具類封裝 * @author 王令 */ public class DruidUtils { private static DataSource dataSource = null; static { try { Properties ppt = new Properties(); ppt.load(DruidUtils.class.getClassLoader().getResourceAsStream("druid.properties")); dataSource = DruidDataSourceFactory.createDataSource(ppt); } catch (IOException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } } public static Connection getConnection(){ Connection connection = null; try { connection = dataSource.getConnection(); } catch (SQLException e) { e.printStackTrace(); } return connection; } public static PreparedStatement getPps(Connection connection, String sql, List<Object> params){ PreparedStatement pps = null; try { pps = connection.prepareStatement(sql); for (int i = 0; i < params.size(); i++) { pps.setObject(i + 1, params.get(i)); } } catch (SQLException e) { e.printStackTrace(); } return pps; } public static boolean update(String sql, List<Object> params){ boolean result = false; try ( Connection connection = getConnection(); PreparedStatement pps = getPps(connection, sql, params); ){ result = pps.executeUpdate() > 0; } catch (SQLException e) { e.printStackTrace(); } return result; } public static void close(Connection connection){ close(connection, null); } public static void close(Connection connection, PreparedStatement pps){ close(connection, pps, null); } public static void close(Connection connection, PreparedStatement pps, ResultSet resultSet){ try { if (ObjectUtil.isNotNull(connection)) { connection.close(); } if (ObjectUtil.isNotNull(pps)){ pps.close(); } if (ObjectUtil.isNotNull(resultSet)){ resultSet.close(); } } catch (SQLException e) { e.printStackTrace(); } } }