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java工程师 培训总结

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目    录

第一章 HTML.. 1

1 标签... 1

2 css样式属性... 1

第二章 JavaScript 3

1 属性... 3

2 设计步骤... 4

第三章 数据库SQLServer 5

1 建立数据库和建表... 5

2 删除和清空表... 6

3 增加数据... 6

4修改... 6

5 查看、查询、分组等... 6

6 多表链接... 7

7 if和循环... 8

8 事务... 8

9 索引... 9

10 游标... 9

11 触发器... 10

12 存储过程(分页)... 12

第四章 JSP. 14

1 三层... 14

2 jstl 15

第五章 Java开源框架... 16

1 hibernate框架... 16

1.1 使用方法... 16

1.2 hibernate中的关系... 17

1.2.1 多对一关系... 17

1.2.2 一对一关系... 18

1.2.3多对多关系(中间表)... 18

2 mybatis框架... 19

2.1使用方法... 19

3 spring框架... 20

3.1 使用方法... 20

4 struts2框架... 22

 

 

第一章 HTML

1 标签

图片:<img src="" />

表格: <table></table>

超链接:<a href=""  display=“block”>    block占满父窗口

下拉列表:

      <select>  <options>1</options><options>2</options>  </select>

有序列表:<ol></ol>

无序列表:ul>  <li><li/> <li><li/>  </ul>

表单:<form><input type="" name="a" value="" /></form>

2 css样式属性

<style type="text/css">

display:block:标签的排列是从上到下,每一个标签占一行,可以设宽高。

display:inline:标签从左到右排除,不可以设宽高

字体大小:font-size:

倾斜:font-style:italic/normal

加粗:font-weight:bold/normal

下划线:text-decoration

背景色:background

对齐方式:text-align

首行缩进:text-indent

行高:line-height

字间的距离:letter-spacing

字体:font-family

外边局:margin

内边距:padding

边框:border:1px #000 double/dashed/solid

表格边框合并:border-collapse:collapse

一格占用多行:rowspan=“  ”

一格占用多列:colspan=“  ”

悬浮:float

溢出隐藏:overflow:hidden

溢出显示滚动条:overflow:scroll

鼠标悬挂:id:hover{}

第二章 JavaScript

1 属性

<script type="text/javascript">

窗体加载事件:window.onload=function(){}

点击事件:onclick

鼠标在上:onmouseover

鼠标离开:onmouseout

获取节点:document.getElementById(“ID”);

父节点:parentNode

跳转链接:

             1、location.href=“http://www.baidu.com”

2、open(“url”,“_self”)

历史访问的地址

             history.back()返回上一个页面

             history.forward()去到之前的页

             history.go(-1)上一页面

修改节点内容:Id.InnerHTML=“ ”

获取节点高/宽:ID.offsetHeight  /  ID.offsetHeight   -----整型,不可修改

节点样属性

             改属性的值:setAttribute()

             拿属性的值:getAttribute()

获取节点样式的属性:style

             ID.style.height=“45px”     可以修改属性值  --字符串

定时事件

             timeObject=setTimeout("xxxxx()",1000);一秒钟后调用xxxxx()一次

             cleatTimeout (timeObjeck); 停止时间

             setInterval("xxxx()",1000);每隔一秒调用xxxxx()一次

window对象---表示整个窗体

             window.alert();

             window.setTimeout();

             window.open();

             window.setInterval();

             window.parseInt()

             window.parseFloat()

在网页上显示时间:

var t=document.getElementById("show_time");

var time=new Date();

var year=time.getFullYear();

var month=time.getMonth()+1;

var day=time.getDate();

var hours=time.getHours();

var minutes=time.getMinutes();

var seconds=time.getSeconds();

var str=year+"年"+month+"月"+day+"日"+hours+"时"+minutes+"分"+seconds+"秒";

t.innerHTML=str;

setTimeout("showtime()",1000);

2 设计步骤

1 window.onload=function(){}

2 在窗体加载的时候,关联其它的事件

1.拿到标签对象2.关联事件

3 写事件

1.获取节点2.调用节点的属性和方法

 

事例:

window.onload=function(){

      h=document.getElementById(“content”);  

      h.onclick=honclick;

}

Function  honclick(){

      };

第三章 数据库SQLServer

1 建立数据库和建表

/*建数据库*/

create database lianxiz

on(

      name=‘lianxiz‘,

      filename=‘F:\lianxi\sql\lianxiz.mdf‘,

      size=3,

      filegrowth=1

)

log on

(

      name=‘lianxiz_log‘,

      filename=‘F:\lianxi\sql\lianxiz_log.ldf‘,

      size=3,

      filegrowth=1

)

/*打开数据库*/

use lianxiz

/*建表*/

create table lianxiz

(

      id int primary key ,

      name varchar(20),

      course varchar(20) ,

      score int

)

2 删除和清空表

/*清空:delete   删除:drop*/

delete *from lianxi where id=?

drop table lianxiz

3 增加数据

/*单行添加*/

insert lianxiz(id, name, course, score)  values(1,‘小一‘,‘语文‘,78)

/*多行添加*/

insert lianxiz(id, name, course, score)

select 2,‘小二‘,‘语文‘,88 union

select 3,‘小三‘,‘语文‘,79 union

select 4,‘小四‘,‘数学‘,58 union

select 5,‘小五‘,‘语文‘,87 union

select 6,‘小六‘,‘数学‘,48 union

select 7,‘小七‘,‘语文‘,98

/*添加来自--*/

insert lianxiz(id,name,course,score)  select id,name,course,score from lianxibak

/*备份*/

select * into lianxi3 from lianxiz

4修改

/*修改单独一个属性  alter column:修改列*/

alter table lianxiz

alter column score varchar(10)

/* 修改*/

update lianxiz set id=8,score=69 where id=1

5 查看、查询、分组等

/*查看*/

select * from lianxiz

/* 模糊查询 */

select * from lianxiz where LoginId like ‘%x%‘

/*分组(各科平均分)*/

select course,AVG (score) as ‘平均分‘,max(score) as ‘最高分‘,min(score) as ‘最低分‘

from lianxiz

group by course

/*分组(各同学的最高分)   union  :联合,结果集合并*/

select name,MAX(score) max from

(

      select name,yuwen score from SCORE

      union all

      select name,shuxue score from SCORE

      union all

      select name,tiyu score from SCORE

)  score group by name

/*查询 对象 出现次数2次以上的 */

select cardid, COUNT(cardid) as num  from cardtb  group by cardid

having  COUNT(cardid) > 1

go

where 子句的作用是在对查询结果进行分组前

having 子句的作用在分组之后过滤数据

/*排序(科目and成绩)*/

select * from lianxiz order by course ,score desc

/*显示前3列 */

select top 3 *from lianxiz

/*显示不在前3列 */

select * from lianxiz where id not in (select top 3 id from lianxi)

/*显示第3列后的3列 */

select top 3 *from lianxiz where id not in (select top 2 id from lianxi )

6 多表链接

/*左链接:以左边为目标*/

select * from lianxiz

left join lianxi3 on lianxiz.id=lianxi3.id

/*右链接:以右边为目标*/

select *from lianxiz

right join lianxi3 on lianxiz.id=lianxi3.id

/*内链接:显示共有的*/

select *from lianxiz

inner join lianxi3 on lianxiz.id=lianxi3.id

/*外链接:显示双方全部*/

select * from lianxiz

full join lianxi3 on lianxiz.id=lianxi3.id

7 if和循环

/*if 语句*/

declare @count int =0

select @count =COUNT (id) from lianxiz

if(@count>3)

begin

      select * from lianxiz where id not in (select top 3 id from lianxiz)

      print @count

end

else

begin

      select top 3 * from lianxiz

end

/*循环语句*/

declare @i int

select @i =3

while(@i >1)

begin

      select * from lianxiz

      select @i=@i-1

end

8 事务

四个特性:一致性、原子性、隔离性、持久性

1、一般事务:

begin tran

一条或多条sql语句

If(@@error<>0)     --------若有多个sql语句,需要写多个判断

Rollback tran

else

commit tran

 

2、自动回滚类型事务:

set xact_abort on/off             on/off(自动回滚开关)

begin tran

多个sql语句

commit tran

9 索引

1、建立索引

create unique index  索引名

on 表名(列明)

go

2、删除索引

drop  index  索引名  on  表名

go

10 游标

/*游标*/

/*创建游标*/

declare youbiao cursor

for select * from lianxiz

go

/*打开游标*/

open youbiao

go

/*抓取游标*/

declare @id  int

declare @name varchar(20)

declare @course varchar(20)

declare @score int

while (1=1)

begin

      fetch next from youbiao into @id ,@name,@course, @score

      if(@@FETCH_STATUS !=0)

      begin

             break

      end

      select @id,@name,@course,@score

      print @id

      print @name

      print @course

      print @score

end

go

/*关闭游标*/

close youbiao

/*释放游标*/

deallocate youbiao

go

11 触发器

/*触发器*/

select * from lianxiz

go

/*删除数据时时,把删除的数据插入lianxibak表*/

create trigger trigger1

on lianxiz

after delete

as

      /*内容*/

      insert  into lianxi3

      select * from deleted

go

delete from lianxiz where id=4

go

/*插入数据,数据有相同,输出提示*/

alter trigger trigger2

on lianxiz

after insert

as

      declare @name varchar(33)

      declare @count int

      select @name=name from inserted

      select @count =COUNT(*) from lianxiz where name=@name

      if(@count>1)

      begin

             print ‘名字有相同‘

             rollback

      end

go

insert lianxiz(id,name,course,score)

values (10,‘小yi‘,‘语文‘,45)

go

/*删除时,代替、不许删除*/

create trigger trigger3

on lianxiz

instead of delete

as

      print ‘没有权限‘

go

delete from lianxiz where id =4

go

/*禁用触发器*/

alter table lianxiz disable trigger trigger3

/*恢复触发器*/

alter table lianxiz enable trigger trigger3

12 存储过程(分页)

/*分页、方法一*/

create proc ffye

(    

      @sizs int ,

      @page int,

      @zys int output

)

as

      select @zys=COUNT(id) from lianxiz

      select top (@sizs) * from lianxiz

             where id not in (select top ((@page-1)*@sizs) id from lianxiz order by id)

             order by id

go

 

/*  运用  */

declare @zs int

exec ffye 2 ,3 ,@zs output

go

/*  分页第二方法  */

alter  proc ffye2

(

      @size int,

      @page int

)

as

      declare @tou int

      declare @wei int

      set @wei = (@size * @page)

      set @tou = (@size *(@page-1)+1)

      declare @tb table (id int identity(1,1) , lianxiid int)

      insert @tb select id from lianxiz

      select lianxiz.* from @tb as tb

             inner join lianxiz on tb.id = lianxiz.id

             where tb.id  between @tou and @wei

go

exec ffye2 2,3

/*  删除分页  */

drop proc ffye

go

第四章 JSP

1 三层

public class SqlBase {

      public Connection conn=null;

      public Statement statm=null;

      public ResultSet rs=null;

      public SqlBase() {

             try {

Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");} catch (ClassNotFoundException e) {e.printStackTrace();}

      }

      public Connection GetConn(){

             try {

     conn=DriverManager.getConnection("jdbc:sqlserver://localhost:1433;DatabaseName=CloneBookShop", "sa", "123456");}

catch (SQLException e) {e.printStackTrace();}

             return conn;

      }

      public ResultSet Select(String sql){

             GetConn();

             try {statm=conn.createStatement();

                    rs=statm.executeQuery(sql);    }

catch (SQLException e) {e.printStackTrace();}

             return rs;

      }

      public int Update(String sql){

             GetConn();

             try {

                    statm=conn.createStatement();

                    int row=statm.executeUpdate(sql);

                    return row;

             } catch (SQLException e) {e.printStackTrace();}

             return -1;

      }

      public ResultSet perpaer(String sql,Object...name){

             GetConn();

             PreparedStatement pstatm;

             try {pstatm = conn.prepareStatement(sql);

                    for(int i=0;i<name.length;i++)

                    {     pstatm.setObject((i+1), name[i]);    }                        rs=pstatm.executeQuery();

             } catch (SQLException e) {e.printStackTrace();}

             return rs;

      }

      public void Close(){

             try {if(rs!=null)rs.close();}

catch (SQLException e) {e.printStackTrace();}

             try {if(statm!=null)statm.close();}

catch (SQLException e) {e.printStackTrace();}

             try {if(conn!=null)conn.close();}

catch (SQLException e) {e.printStackTrace();}

      }

 

2 jstl

使用jstl语句前,要页面上添加

%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%

1、输入:

<c:set  var="pageMax"  value="${Books.pager}" ></c:set>

2、输出:

<c:out value="${ pageMax  }"></c:out>

3、选择:

<c:choose>

<c:when ></c:when>

<c:otherwise></c:otherwise>

</c:choose>

4、For循环

<c:forEach  items=" "  var=" "  varStatus="s">

</c:forEach>

第五章 Java开源框架

1 hibernate框架

是ORM框架,对jdbc进行了封装,大大简化了dao层的编码工作。

1.1 使用方法

a、配置文件hibernate.cfg.xml

<?xml version=‘1.0‘ encoding=‘UTF-8‘?>

<!DOCTYPE hibernate-configuration PUBLIC

          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"

          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<!-- Generated by MyEclipse Hibernate Tools.                   -->

<hibernate-configuration>

    <session-factory>

        <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>

        <property name="connection.url">jdbc:oracle:thin:@localhost:1521/schooldb</property>

        <property name="connection.username">accp</property>

        <property name="connection.password">123</property>

        <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>

        <property name="hibernate.show_sql">true</property>

        <!--<property name="current_session_context_class">jta</property>-->

        <property name="hibernate.current_session_context_class">thread</property>

      <mapping resource="entity/Grade.hbm.xml" />

    </session-factory>

</hibernate-configuration>

b、类文件配置Grade.hbm.xml

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"

"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<!--

    Mapping file autogenerated by MyEclipse Persistence Tools

-->

<hibernate-mapping>

      <class name="com.hustner.entity.Grade" table="GRADEINFO" schema="dbo" lazy="true">

             <id name="id" type="java.lang.Integer">

                    <column name="ID" />

                    <generator class="assigned"></generator>

             </id>

             <property name="name" type="java.lang.String">

                    <column name="NAME" length="20" not-null="true" />

             </property>

             <bag name="students">

            <key column="GRADE_ID" />

            <one-to-many class="com.hustner.entity.Student" />

        </bag>

             <set name="setStudents">

                    <key column="GRADE_ID" />

                    <one-to-many class="com.hustner.entity.Student" />

             </set>

             <map name="mapStudents">

            <key column="GRADE_ID" />

            <map-key type="java.lang.Integer" column="ID" />

            <one-to-many class="com.hustner.entity.Student"/>

        </map>

      </class>

</hibernate-mapping>

c、工作测试

Configuration config = new Configuration().configure();

             SessionFactory sessionFactory = config.buildSessionFactory();

             //sessionFactory.getCurrentSession()

             Session session=sessionFactory.openSession();

             Transaction tran = null;

             try{

                    tran = session.beginTransaction();

                    tran.commit();

             }catch(Exception e){

                    if(tran!=null)tran.rollback();

                    e.printStackTrace();

             }finally{

                    try{session.close();}catch(Exception e){e.printStackTrace();}

             }

1.2 hibernate中的关系

1.2.1 多对一关系

多方(Student)

      属性:普通对象(Grade)

      <many-to-one name="grade" class="entity.Grade" cascade="save-update">

            <column name="GID" />

        </many-to-one>

一方(Grade)

      属性:集合对象(List<T>,Set<T>,Map<T,T>)

        <bag name="students" cascade="all" inverse="true">

            <key column="GID" />

            <one-to-many class="entity.Student" />

        </bag>

 

             <set name="students" cascade="all" lazy="false">

                    <key column="GID" />

                    <one-to-many class="entity.Student" />

             </set>

 

         <map>

            <key column="GID" />

            <map-key type="java.lang.String" column="SNAME" />

            <one-to-many class="entity.Student"/>

      </map>

1.2.2 一对一关系

主健方

      属性:普通属性

      <one-to-one name="paper" property-ref="student" class="entity.Paper" cascade="all"></one-to-one>

外健方

      属性:普通属性

      <many-to-one name="student" class="entity.Student" unique="true" cascade="all">

            <column name="SID"></column>

        </many-to-one>

1.2.3多对多关系(中间表)

      属性:集合

      配置:

      <set name="students" table="中间表" cascade="save-update">

            <key column="cid" />

            <many-to-many class="entity.Student" column="sid" />

        </set>

2 mybatis框架

把SQL语句和java代码分离,sql语句在xml中配置。

2.1使用方法

a、导包并配置总配置mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN"

"http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>

    <typeAliases>

 

    </typeAliases>

    <environments default="development">

        <environment id="development">

        <transactionManager type="JDBC"/>

            <dataSource type="POOLED">

                  <property name="driver" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"/>

                  <property name="url" value="jdbc:sqlserver://127.0.0.1:1433;DataBaseName=testdb" />

                  <property name="username" value="sa"/>

                  <property name="password" value="123456"/>

            </dataSource>

        </environment>

    </environments>

    <mappers>

    </mappers>  

</configuration>

b、建表

c、实体类

d、配置实体类

      mybatis-config.xml 中配置加入一条语句:

      <typeAliases>

        <typeAlias alias="Grade" type="entity.Grade"/>

         </typeAliases>

f、配置sql语句(任意命名,最好以类名命名。便于管理。例:Grade.xml)

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"

"http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="entity">

    <resultMap type="Grade(等于alias="Grade")" id="gradeMap">

      <id column="id" property="gradeId"/>

      <result column ="name" property="gradeName" />

    </resultMap>

    <select id="selectAllGrades(命名)" resultMap="gradeMap(映射到)">

        select * from gradeinfo

    </select>

</mapper>

g、把sql语句配置添加到总配置

    <mappers>

         <mapper resource="entity/Grade.xml"/>

    </mappers>

h、工作或测试

             Reader reader = null;

             SqlSessionFactory sqlSessionFactory = null;

             SqlSession sqlSession=null;

             try {

                    reader = Resources.getResourceAsReader("mybaties-config.xml");

                    //创建一个连接工厂,通过连接工厂建立连接

                    sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);

                    sqlSession=sqlSessionFactory.openSession();

                    List<Grade> grades=sqlSession.selectList("selectAllGrades2", null);

                    for(Grade grade:grades)

{     System.out.println(grade.getGradeName());}

             }

             catch (IOException e) {    e.printStackTrace();}

             finally   

{try {reader.close();}       catch (IOException e){e.printStackTrace(); }

                    sqlSession.close();

             }

3 spring框架

对象:全部对象

3.1 使用方法

配置文件 ( applicationContext.xml )

<?xml version="1.0" encoding="UTF-8"?>

<beans

      xmlns="http://www.springframework.org/schema/beans"

      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

      xmlns:p="http://www.springframework.org/schema/p"

      xmlns:aop="http://www.springframework.org/schema/aop"

      xmlns:tx="http://www.springframework.org/schema/tx"

      xmlns:context="http://www.springframework.org/schema/context"

      xsi:schemaLocation="http://www.springframework.org/schema/beans

             http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

             http://www.springframework.org/schema/aop

             http://www.springframework.org/schema/aop/spring-aop-2.0.xsd

             http://www.springframework.org/schema/tx

             http://www.springframework.org/schema/tx/spring-tx-2.0.xsd

             http://www.springframework.org/schema/context

             http://www.springframework.org/schema/context/spring-context-2.5.xsd">

      <context:component-scan base-package="*"></context:component-scan>

      <aop:aspectj-autoproxy></aop:aspectj-autoproxy>

      <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">

             <property name="driverClassName">

                    <value>com.microsoft.sqlserver.jdbc.SQLServerDriver</value>

             </property>

             <property name="url">

                    <value>jdbc:sqlserver://localhost:1433; DatabaseName=shop</value>

             </property>

             <property name="username">

                    <value>sa</value>

             </property>

             <property name="password">

                    <value>123456</value>

             </property>

      </bean>

      <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">

             <property name="dataSource">

                    <ref bean="dataSource"/>

             </property>

             <property name="configLocation">

                    <value>classpath:mybaties-config.xml</value>

             </property>

      </bean>

      <bean id="sqlSessionTemplate"

             class="org.mybatis.spring.SqlSessionTemplate">

             <constructor-arg name="sqlSessionFactory" ref="sqlSessionFactory">

             </constructor-arg>

      </bean>

      <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

             <property name="dataSource" ref="dataSource" />

      </bean>

 

      <bean id="vendorDao" class="com.hustner.dao.VendorDaoImpl">

      <property name="sqlSessionTemplate" ref="sqlSessionTemplate"  ></property>

      </bean>

     

      <bean id="vendorService" class="com.hustner.service.VendorServiceImpl">

             <property name="vendorDao" ref="vendorDao"></property>

      </bean>

     

      <bean id="vendorAction" class="com.hustner.controller.VendorAction" scope="prototype">

             <property name="vendorService" ref="vendorService"></property>

      </bean>

</beans>

4 struts2框架

java工程师 培训总结

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原文地址:http://www.cnblogs.com/zjw0914/p/5128397.html

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