1 利用MyBatis进行模糊查询

在利用MyBatis进行模糊查询时候。须要用到concat，注意在Oracle中concat连接的是两个參数。不是三个參数。

持久化类：

package com.web.entity;public class Student {private Integer studentId;private String studentName;private Classes classes;public Integer getStudentId() {return studentId;}public void setStudentId(Integer studentId) {this.studentId = studentId;}public String getStudentName() {return studentName;}public void setStudentName(String studentName) {this.studentName = studentName;}public Classes getClasses() {return classes;}public void setClasses(Classes classes) {this.classes = classes;}}

dao中方法：

package com.web.dao;import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;import com.web.entity.Student;public class StudentDao {private int res=-1;private SqlSession sqlSession=null;public  SqlSession getSqlSession(){try{String resource="mybatis-config.xml";InputStream is=Resources.getResourceAsStream(resource);SqlSessionFactory sqlSessionFactory=new SqlSessionFactoryBuilder().build(is);sqlSession=sqlSessionFactory.openSession(true);}catch(Exception e){System.out.println("出错");e.printStackTrace();}return sqlSession;}public Student findTStudentByName(Student student){sqlSession=getSqlSession();Student s=sqlSession.selectOne("lk", student);return s;}/*public int getCount(Integer classesid){int result=-1;Map<String, Integer> map=new HashMap<String, Integer>();map.put("classesid", classesid);map.put("studentcount", -1);sqlSession=getSqlSession();sqlSession.selectOne("gc", map);result=map.get("studentcount");return result;}*/
}

映射文件：

<?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="com.pb.dao.StudentDao"> <!-- <resultMap type="Student" id="ts"> <id property="studentId" column="studentId" /> <result property="studentName" column="studentName" /> <association property="classes" column="classesId" javaType="Classes"> <id property="classesId" column="classesId" /> <result property="classesName" column="classesName" /> </association> </resultMap> <select id="selectonetoone" resultMap="ts" parameterType="Student"> select s.studentid,s.studentname,c.classesname from student s left join classes c on s.classesid=c.classesid where s.studentid=#{studentId} </select> --> <select id="lk" resultMap="ts" parameterType="Student"> select * from student s where s.studentname like concat(concat('%','h'),'%') </select> <!-- <select id="gc" parameterMap="gm" statementType="CALLABLE"> call pro_student(?,?

) </select> <parameterMap type="java.util.Map" id="gm"> <parameter property="classesid" mode="IN" jdbcType="INTEGER"/> <parameter property="studentcount" mode="OUT" jdbcType="INTEGER"/> </parameterMap> --> </mapper>

2 利用MyBatis运行存储过程：

在映射文件里定义一个parameterMap作为參数，设置statementType="CALLABLE"，过程的參数放置？站位符。

在方法中也创建一个Map。放置參数。SqlSession调用方法的时候传入该Map就可以。

存储过程：

create or replace procedure pro_student(
cid in number,
coun out number
)is
begin
select count(*) into coun from student s where s.classesid=cid;
end;

配置文件：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.pb.dao.StudentDao">
<!--     <resultMap type="Student" id="ts"><id property="studentId" column="studentId" /><result property="studentName" column="studentName" /><association property="classes" column="classesId"javaType="Classes"><id property="classesId" column="classesId" /><result property="classesName" column="classesName" /></association></resultMap><select id="selectonetoone" resultMap="ts" parameterType="Student">selects.studentid,s.studentname,c.classesnamefromstudent sleft join classes con s.classesid=c.classesidwhere s.studentid=#{studentId}</select> --><select id="lk" resultMap="ts" parameterType="Student">select * from student s where s.studentname like concat(concat('%','h'),'%')</select><select id="gc" parameterMap="gm" statementType="CALLABLE">call pro_student(?,?)</select><parameterMap type="java.util.Map" id="gm"><parameter property="classesid" mode="IN" jdbcType="INTEGER"/><parameter property="studentcount" mode="OUT" jdbcType="INTEGER"/></parameterMap></mapper>

dao中方法：

package com.web.dao;import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;import com.web.entity.Student;public class StudentDao {private int res=-1;private SqlSession sqlSession=null;public  SqlSession getSqlSession(){try{String resource="mybatis-config.xml";InputStream is=Resources.getResourceAsStream(resource);SqlSessionFactory sqlSessionFactory=new SqlSessionFactoryBuilder().build(is);sqlSession=sqlSessionFactory.openSession(true);}catch(Exception e){System.out.println("出错");e.printStackTrace();}return sqlSession;}public Student findTStudentByName(Student student){sqlSession=getSqlSession();Student s=sqlSession.selectOne("lk", student);return s;}public int getCount(Integer classesid){int result=-1;Map<String, Integer> map=new HashMap<String, Integer>();map.put("classesid", classesid);map.put("studentcount", -1);sqlSession=getSqlSession();sqlSession.selectOne("gc", map);result=map.get("studentcount");return result;}
}