一：整合日志含有log4j和logback
logback是log4j的升级版他性能提升较大，有些甚至达到10倍以上，占的内存更小，slf4j能很好的整合它，还有很多数不胜数的优势
1.下载jar包，依赖：
log4j
log4j
1.2.16
2.log4j.properties配置文件
### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
### direct messages to file mylog.log ###
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=d:/log.txt
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
### set log levels - for more verbose logging change 'info' to 'debug' ###
log4j.logger.cn.dawn=debug, stdout,file
###log4j.rootLogger=debug, stdout,file###
3.logback
1.jar包（所需要的依赖）
org.slf4j
slf4j-api
1.7.21
ch.qos.logback
logback-core
1.2.3
ch.qos.logback
logback-classic
1.2.3
test
2.logback.xml配置文件
%date{yyyy-MM-dd HH:mm:ss.SSS} %-5level [%thread]%logger{56}.%method:%L -%msg%n logs/OALog.log logs/archive/OALog_all_%d{yyyy-MM-dd}.%i.log.zip 100MB %date{yyyy-MM-dd HH:mm:ss.SSS} %-5level [%thread]%logger{56}.%method:%L -%msg%n //要改成自己项目的dao层全类名
二：SQL的操作
1： sql片段解决 * sql的查询语句列名太多很麻烦解决的方案：
bookId,bookName,bookAuthor,bookPrice
2：模糊查询
dao层：public List
小配置中：
bookId,bookName,bookAuthor,bookPrice
测试类中：
@Test
public void t6likeSelect(){
String path = "mybatis-config.xml";
try {
InputStream e = Resources.getResourceAsStream(path);
SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
SqlSessionFactory factory = builder.build(e);
SqlSession session = factory.openSession();
IBookDAO mapper = session.getMapper(IBookDAO.class); session.getMapper(dao层接口.class)反射的方式获取到了dao层这个接口的实现类，所以就可以使用强类型的方式，直接通过点的方式点出来供你选择。例如mapper.findAll()
Listlist = mapper.likeSelect("的"); for (Book item:list) { System.out.println(item.getBookName()); } session.close(); } catch (IOException var9) { var9.printStackTrace(); } }
三：resultMap
在接口中的方法声明如下：public List
在小配置中如下：
他默认的自动映射行为是PARTIAL，部分的，也就是开启的，他也可以手动设置，关闭自动映射行为
设置方法是在大配置文件中
它的意思是关闭NONE,这个不用关，所以我就是简单的操作后就注释掉了
测试类中
@Test
public void t1SelectAll(){
String path = "mybatis-config.xml";
try {
InputStream e = Resources.getResourceAsStream(path);
SqlSessionFactoryBuilder builder = new SqlSessionFactoryBuilder();
SqlSessionFactory factory = builder.build(e);
SqlSession session = factory.openSession();
IBookDAO mapper = session.getMapper(IBookDAO.class);
List list = mapper.findAllBook();
for (Book item:list) {
System.out.println(item.getBookName());
}
session.close();
} catch (IOException var9) {
var9.printStackTrace();
}
}
四：多条件查询
实体类:
public class Book {
private Integer bookID;
private String bookName;
private String bookAuthor;
private Integer bookPrice;
}
接口中的方法
俩种形式，一种采用map，一种采用直接参数Index（索引的方式）来实现的多条件查询
//根据多条件查询map版
public List findtrueBookMap(Map map);
//根据多条件查询index版
public List findtrueBookIndex(String bookName,Integer bookPrice);
小配置中
测试类中
///多条件查询Index版
@Test
public void t4selectmoreIndex(){
SqlSession session= MyBatisUtils.getSession();
IBookDAO mapper = session.getMapper(IBookDAO.class);
List books = mapper.findtrueBookIndex("心",40);
for (Book items:books) {
System.out.println(items.getBookName());
}
session.close();
}
///多条件查询map版
@Test
public void t3selectmoreMap(){
SqlSession session= MyBatisUtils.getSession();
IBookDAO mapper = session.getMapper(IBookDAO.class);
Map map=new HashMap();
map.put("bookName","心");
map.put("bookPrice",40);
List books = mapper.findtrueBookMap(map);
for (Book items:books) {
System.out.println(items.getBookName());
}
session.close();
}
五：智能标签分为 where ,if ,choose ,foreach的array方式 ,foreach的list方式 ,foreach的list自定义类型方式
实体类
public class Book {
private Integer bookID;
private String bookName;
private String bookAuthor;
private Integer bookPrice;
public Book() {
}
public Integer getBookID() {
return this.bookID;
}
public void setBookID(Integer bookID) {
this.bookID = bookID;
}
public String getBookName() {
return this.bookName;
}
public void setBookName(String bookName) {
this.bookName = bookName;
}
public String getBookAuthor() {
return this.bookAuthor;
}
public void setBookAuthor(String bookAuthor) {
this.bookAuthor = bookAuthor;
}
public Integer getBookPrice() {
return this.bookPrice;
}
public void setBookPrice(Integer bookPrice) {
this.bookPrice = bookPrice;
}
}
接口中的方法
//智能标签where if
public List findtrueBookByIf(String bookName,Integer bookPrice);
//智能标签where choose
public List findtrueBookByChoose(Integer bookPrice);
//智能标签where foreach array
public List findtrueBookByForeachArray(int [] array);
//智能标签where foreach list
public List findtrueBookByForeachList(List list);
//智能标签where foreach list
public List findtrueBookByForeachListBook(List list);
小配置中
测试类中
///智能标签where + foreach list Book自定义list 进行多条件查询
@Test
public void t9selectZhiNengByForeachListBook(){
SqlSession session= MyBatisUtils.getSession();
IBookDAO mapper = session.getMapper(IBookDAO.class);
List list=new ArrayList();
Book b1=new Book();
b1.setBookID(1);
Book b2=new Book();
b2.setBookID(2);
list.add(b1);
list.add(b2);
List books = mapper.findtrueBookByForeachListBook(list);
for (Book items:books) {
System.out.println(items.getBookName());
}
session.close();
}
///智能标签where + foreach list 进行多条件查询
@Test
public void t8selectZhiNengByForeachList(){
SqlSession session= MyBatisUtils.getSession();
IBookDAO mapper = session.getMapper(IBookDAO.class);
List list=new ArrayList();
list.add(1);
list.add(3);
List books = mapper.findtrueBookByForeachList(list);
for (Book items:books) {
System.out.println(items.getBookName());
}
session.close();
}
///智能标签where + foreach array 进行多条件查询
@Test
public void t7selectZhiNengByForeachArray(){
SqlSession session= MyBatisUtils.getSession();
IBookDAO mapper = session.getMapper(IBookDAO.class);
int[] array={1,3};
List books = mapper.findtrueBookByForeachArray(array);
for (Book items:books) {
System.out.println(items.getBookName());
}
session.close();
}
///智能标签where + choose进行多条件查询
@Test
public void t6selectZhiNengByChoose(){
SqlSession session= MyBatisUtils.getSession();
IBookDAO mapper = session.getMapper(IBookDAO.class);
List books = mapper.findtrueBookByChoose(500);
for (Book items:books) {
System.out.println(items.getBookName());
}
session.close();
}
///智能标签where + if 进行多条件查询
@Test
public void t5selectZhiNengByIf(){
SqlSession session= MyBatisUtils.getSession();
IBookDAO mapper = session.getMapper(IBookDAO.class);
List books = mapper.findtrueBookByIf("心",40);
for (Book items:books) {
System.out.println(items.getBookName());
}
session.close();
}
六：