MyBatis provides built-in support for mapping CLOB/BLOB type columns. Assume we have the following table to store the Students and Tutors photographs and their biodata: CREATE TABLE USER_PICS ( ID ) NOT NULL AUTO_INCREMENT, NAME ) DEFAULT NULL, PIC B…

BLOB和CLOB都是大字段类型. BLOB是按二进制来存储的,而CLOB是可以直接存储文字的. 通常像图片.文件.音乐等信息就用BLOB字段来存储,先将文件转为二进制再存储进去.文章或者是较长的文字,就用CLOB存储. BLOB和CLOB在不同的数据库中对应的类型也不一样: MySQL 中:clob对应text/longtext,blob对应blob Oracle中:clob对应clob,blob对应blob MyBatis提供了内建的对CLOB/BLOB类型列的映射处理支持. 建表语句: c…

1. 表结构 1.1 在Mysql中的数据类型,longblob  -->  blob, longtext --> clob 2. 配置文件, 请参考  myBatis之入门示例 3. LOB.java package com.blueStarWei.entity; public class LOB { private Integer id; private byte[] picture;//BLOb --> byte[] private String remark;//CLOB --&…

一.时间(Date.Time.Timestamp) java.sql.Date/java.sql.Time/java.sql.Timestamp extends java.util.Date public class TimeData { PreparedStatement pStatement=null; //操作日期类型的数据 public void insertDate(Connection connection,long time){ try { String sql="insert i…

在通过Struts2标签显示对象的Clob属性值的时候.显示的并非CLOB或者BLOB的内容,而是显示的toString方法的值 比如我在实体中的注解为: @Lob @Column(name = "CONTENT_TEXT") public String getContentText() { return contentText; } 前台页面读取方式为: <s:property value="#entry.contentText" /> 显示结果为:…

Oracle 使用 clob 与 blob 插入一些比较庞大的文本或者文件,JDBC 插入时 也比较简单 表结构 CREATE TABLE test_info ( user_id int NOT NULL, user_name varchar(64) NULL, email varchar(32) NULL, contentText blob not null ); java 代码 /** * 获得数据库连接 * @param url * @param username * @param pas…

1 目录结构记得导包咯 mysql oracle 2 代码,DBUtil工具类见前面的随笔博文 package dbex.mysql; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileReader; import java.io.FileWriter; import java.sql.Connection; import java.sql.P…

MyBatis supports persisting enum type properties out of the box. Assume that the STUDENTS table has a column gender of the type varchar to store either MALE or FEMALE as the value. And, the Student object has a gender property that is of the type enu…

Create global temporary table temp on commit preserve rows as select * from abc@xxx select * from temp…

Getting Started with MyBatis Hello World Integration with Spring Bootstrapping MyBatis Configuring MyBatis using XML Environment, DataSource, TransactionManager Properties typeAliases typeHandlers Settings Mappers SQL Mappers Using XML Mapped stateme…