Java Tutorial/Spring/RowMapper

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Implements RowMapper To Map First Column

File: context.xml



   <source lang="java">

<?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:util="http://www.springframework.org/schema/util"
      xmlns:tx="http://www.springframework.org/schema/tx"
      xmlns:aop="http://www.springframework.org/schema/aop"
      xmlns:lang="http://www.springframework.org/schema/lang"
      xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
                          http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-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/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
                          http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-2.0.xsd">

   <bean id="dataSource" class="org.apache.rumons.dbcp.BasicDataSource" destroy-method="close">
   <property name="driverClassName" value="org.hsqldb.jdbcDriver"/>
   <property name="url" value="jdbc:hsqldb:mem:."/>
   <property name="username" value="sa"/>
   <property name="password" value=""/>
   </bean>

   <bean id="lobHandler" class="org.springframework.jdbc.support.lob.OracleLobHandler">
       <property name="nativeJdbcExtractor" ref="nativeJdbcExtractor"/>
   </bean>
   <bean id="nativeJdbcExtractor" class="org.springframework.jdbc.support.nativejdbc.rumonsDbcpNativeJdbcExtractor"/>
   <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
       <property name="dataSource" ref="dataSource"/>
   </bean>

</beans></source>





Use RowMapper To Map Row To Entity

File: EmployeeDaoImpl.java



   <source lang="java">

import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Types; import java.util.ArrayList; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.sql.DataSource; import org.springframework.dao.DataAccessException; import org.springframework.jdbc.core.BatchPreparedStatementSetter; import org.springframework.jdbc.core.RowMapper; import org.springframework.jdbc.core.SqlOutParameter; import org.springframework.jdbc.core.SqlParameter; import org.springframework.jdbc.core.simple.ParameterizedRowMapper; import org.springframework.jdbc.core.simple.SimpleJdbcTemplate; import org.springframework.jdbc.core.support.AbstractLobCreatingPreparedStatementCallback; import org.springframework.jdbc.core.support.AbstractLobStreamingResultSetExtractor; import org.springframework.jdbc.core.support.JdbcDaoSupport; import org.springframework.jdbc.object.MappingSqlQuery; import org.springframework.jdbc.object.SqlUpdate; import org.springframework.jdbc.object.StoredProcedure; import org.springframework.jdbc.support.lob.DefaultLobHandler; import org.springframework.jdbc.support.lob.LobCreator; import org.springframework.jdbc.support.lob.LobHandler; import org.springframework.jdbc.support.nativejdbc.SimpleNativeJdbcExtractor; import org.springframework.util.FileCopyUtils; //import org.apache.rumons.dbcp.BasicDataSource;

public class EmployeeDaoImpl extends JdbcDaoSupport{ 

 protected void initDao() throws Exception {
   super.initDao();
   getJdbcTemplate().setNativeJdbcExtractor(new SimpleNativeJdbcExtractor());
 }
 public List<Employee> loadAll() {
   return (List<Employee>) getJdbcTemplate().query("SELECT * FROM employee", new EmployeeRowMapper());
 }

} class EmployeeRowMapper implements RowMapper { 

 public Object mapRow(ResultSet resultSet, int row) throws SQLException {
   Employee employee = new Employee();
   employee.setId(resultSet.getInt("id"));
   employee.getName().setFirst(resultSet.getString("name_first"));
   employee.getName().setLast(resultSet.getString("name_last"));
   employee.setAge(resultSet.getInt("age"));
   return employee;
 }

} class Employee { 

 private Integer id;
 private Name name = new Name();
 private Integer age;
 private Sex sex;
 private Address address = new Address();
 private List<PhoneNumber> phoneNumbers = new ArrayList<PhoneNumber>();
 public Employee() {
 }
 public Employee(String firstName, String lastName) {
   this.getName().setFirst(firstName);
   this.getName().setLast(lastName);
 }
 void setId(Integer id) {
   this.id = id;
 }
 public Integer getId() {
   return id;
 }
 public Address getAddress() {
   return address;
 }
 public Integer getAge() {
   return age;
 }
 public void setAge(Integer age) {
   this.age = age;
 }
 public Name getName() {
   return name;
 }
 public List<PhoneNumber> getPhoneNumbers() {
   return Collections.unmodifiableList(phoneNumbers);
 }
 public void addPhoneNumber(PhoneNumber phoneNumber) {
   this.phoneNumbers.add(phoneNumber);
 }
 public void removePhoneNumber(PhoneNumber phoneNumber) {
   this.phoneNumbers.remove(phoneNumber);
 }
 public void removePhoneNumber(int index) {
   this.phoneNumbers.remove(index);
 }
 public Sex getSex() {
   return sex;
 }
 public void setSex(Sex sex) {
   this.sex = sex;
 }

} abstract class Sex { 

 public static final Sex MALE = new Male();
 public static final Sex FEMALE = new Female();
 public boolean equals(Object o) {
   if (o == null) {
     return false;
   }
   return getClass().equals(o.getClass());
 }

} class PhoneNumber { } class Address { 

 private String line1;
 private String line2;
 private String city;
 private String state;
 private String zip;
 public void setLine1(String line1) {
   this.line1 = line1;
 }
 public String getLine1() {
   return this.line1;
 }
 public void setLine2(String line2) {
   this.line2 = line2;
 }
 public String getLine2() {
   return this.line2;
 }
 public void setCity(String city) {
   this.city = city;
 }
 public String getCity() {
   return this.city;
 }
 public void setState(String state) {
   this.state = state;
 }
 public String getState() {
   return this.state;
 }
 public void setZip(String zip) {
   this.zip = zip;
 }
 public String getZip() {
   return this.zip;
 }

} final class Male extends Sex { 

 protected Male() {
 }

} final class Female extends Sex { 

 protected Female() {
 }

}

class Name { 

 private String first;
 private String middle;
 private String last;
 public void setFirst(String first) {
   this.first = first;
 }
 public String getFirst() {
   return this.first;
 }
 public void setMiddle(String middle) {
   this.middle = middle;
 }
 public String getMiddle() {
   return this.middle;
 }
 public void setLast(String last) {
   this.last = last;
 }
 public String getLast() {
   return this.last;
 }

}</source>





Use RowMapper To Return List Of String

File: context.xml



   <source lang="java">

<?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:util="http://www.springframework.org/schema/util"
      xmlns:tx="http://www.springframework.org/schema/tx"
      xmlns:aop="http://www.springframework.org/schema/aop"
      xmlns:lang="http://www.springframework.org/schema/lang"
      xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd
                          http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-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/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd
                          http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-2.0.xsd">

   <bean id="dataSource" class="org.apache.rumons.dbcp.BasicDataSource" destroy-method="close">
   <property name="driverClassName" value="org.hsqldb.jdbcDriver"/>
   <property name="url" value="jdbc:hsqldb:mem:."/>
   <property name="username" value="sa"/>
   <property name="password" value=""/>
   </bean>

   <bean id="lobHandler" class="org.springframework.jdbc.support.lob.OracleLobHandler">
       <property name="nativeJdbcExtractor" ref="nativeJdbcExtractor"/>
   </bean>
   <bean id="nativeJdbcExtractor" class="org.springframework.jdbc.support.nativejdbc.rumonsDbcpNativeJdbcExtractor"/>
   <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
       <property name="dataSource" ref="dataSource"/>
   </bean>

</beans></source>


Источник — «http://jexp.ru/index.php?title=Java_Tutorial/Spring/RowMapper&oldid=3322»