1. queryForMap
public Map<String, Object> queryForMap(String sql); public Map<String, Object> queryForMap(String sql, Object... args); public Map<String, Object> queryForMap(String sql, Object[] args, int[] argTypes); // The methods above are meant to be s single row query.
As we can see from API Doc:
1) Return type is Map<String, Object>. One entry for each column, using the column name as the key.
2) As we cannot have duplicate keys, this query is meant to be a single row query.
3) This methods is appropriate when you don't have a domain model,
Otherwise, consider using one of the queryForObject() methods.
4) If the row count that matches the sql is bigger than one, IncorrectResultSizeDataAccessException will be thrown.
package edu.xmu.jdbc.dao;
import java.util.List;
import java.util.Map;
import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
import edu.xmu.jdbc.bean.Student;
public class JdbcTemplateDao {
private DataSource dataSource;
private JdbcTemplate jdbcTemplate;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.jdbcTemplate = new JdbcTemplate(this.dataSource);
}
public void prepareData(List<Student> studentList) {
String sql = "insert into student(name, age) values (?, ?)";
for (Student student : studentList) {
jdbcTemplate
.update(sql,
new Object[] { student.getName(), student.getAge() },
new int[] { java.sql.Types.VARCHAR,
java.sql.Types.INTEGER });
}
}
public Map<String, Object> queryForMap() {
String sql = "select id, name, age from student";
return jdbcTemplate.queryForMap(sql);
}
public Map<String, Object> queryForMap2(int id) {
String sql = "select id, name, age from student where id=?";
return jdbcTemplate.queryForMap(sql, new Object[] { id });
}
public Map<String, Object> queryForMap3(int id) {
String sql = "select id, name, age from student where id<=?";
return jdbcTemplate.queryForMap(sql, new Object[] { id },
new int[] { java.sql.Types.INTEGER });
}
public void truncateTable() {
String sql = "truncate table student";
jdbcTemplate.execute(sql);
}
}
package edu.xmu.jdbc.dao;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import edu.xmu.jdbc.bean.Student;
public class JdbcTemplateTest {
private DriverManagerDataSource dataSource;
private String url = "jdbc:mysql://localhost:3306/jdbctest";
private String username = "root";
private String password = "root";
private JdbcTemplateDao dao;
@Before
public void setUp() {
dataSource = new DriverManagerDataSource(url, username, password);
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dao = new JdbcTemplateDao();
dao.setDataSource(dataSource);
List<Student> studentList = new ArrayList<Student>();
Student student = new Student("Davy", 24);
studentList.add(student);
dao.prepareData(studentList);
}
@Test
public void queryForMapTest() {
Map<String, Object> resultMap = dao.queryForMap();
Set<Map.Entry<String, Object>> entrySet = resultMap.entrySet();
for (Entry<String, Object> entryMap : entrySet) {
System.out.println(entryMap.getKey() + "=" + entryMap.getValue());
}
}
@Test
public void queryForMap2Test() {
Map<String, Object> resultMap = dao.queryForMap2(1);
Set<Map.Entry<String, Object>> entrySet = resultMap.entrySet();
for (Entry<String, Object> entryMap : entrySet) {
System.out.println(entryMap.getKey() + "=" + entryMap.getValue());
}
}
@Test
public void queryForMap3Test() {
Map<String, Object> resultMap = dao.queryForMap3(2);
Set<Map.Entry<String, Object>> entrySet = resultMap.entrySet();
for (Entry<String, Object> entryMap : entrySet) {
System.out.println(entryMap.getKey() + "=" + entryMap.getValue());
}
}
@After
public void tearDown() {
dao.truncateTable();
}
}
2. queryForObject
public <T> T queryForObject(String sql, Class<T> requiredType); public <T> T queryForObject(String sql, Object[] args, Class<T> requiredType); public <T> T queryForObject(String sql, Class<T> requiredType, Object... args); // The methods above are meant to be a single row and single column query. public <T> T queryForObject(String sql, Object[] args, int[] argTypes, Class<T> requiredType); public <T> T queryForObject(String sql, RowMapper<T> rowMapper); public <T> T queryForObject(String sql, Object[] args, RowMapper<T> rowMapper); public <T> T queryForObject(String sql, Object[] args, int[] argTypes, RowMapper<T> rowMapper); //The methods above are meant to be a single row query.
As we can see from API Doc:
1) The methods without rowMapper params are meant to be a single row and single column query.
Because the requiredType can only be java embedded type.
2) The methods with rowMapper params are meant to be a single row query.
package edu.xmu.jdbc.dao;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import edu.xmu.jdbc.bean.Student;
public class QueryForObjectDao {
private DataSource dataSource;
private JdbcTemplate jdbcTemplate;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.jdbcTemplate = new JdbcTemplate(this.dataSource);
}
public void prepareData(List<Student> studentList) {
String sql = "insert into student(name, age) values (?, ?)";
for (Student student : studentList) {
jdbcTemplate
.update(sql,
new Object[] { student.getName(), student.getAge() },
new int[] { java.sql.Types.VARCHAR,
java.sql.Types.INTEGER });
}
}
public Student queryForObject() {
String sql = "select id from student";
int id = jdbcTemplate.queryForObject(sql, Integer.class);
sql = "select name from student";
String name = jdbcTemplate.queryForObject(sql, String.class);
sql = "select age from student";
int age = jdbcTemplate.queryForObject(sql, Integer.class);
return new Student(id, name, age);
}
public Student queryForObject2(int id) {
String sql = "select name from student where id=?";
String name = jdbcTemplate.queryForObject(sql, new Object[] { id },
String.class);
sql = "select age from student where id=?";
int age = jdbcTemplate.queryForObject(sql, new Object[] { id },
Integer.class);
return new Student(id, name, age);
}
public Student queryForObject3(int id) {
String sql = "select name from student where id=?";
String name = jdbcTemplate.queryForObject(sql, new Object[] { id },
new int[] { java.sql.Types.INTEGER }, String.class);
sql = "select age from student where id=?";
int age = jdbcTemplate.queryForObject(sql, new Object[] { id },
new int[] { java.sql.Types.INTEGER }, Integer.class);
return new Student(id, name, age);
}
/**
* This sql is meant to be a single row result set. <br/>
* If result set size is bigger than 1,
* IncorrectResultSizeDataAccessException will be thrown.
*
* @return
*/
public Student queryForObject4() {
String sql = "select id, name, age from student";
Student student = jdbcTemplate.queryForObject(sql,
new RowMapper<Student>() {
public Student mapRow(ResultSet rs, int rowNum)
throws SQLException {
// int id = rs.getInt("id");
int id = rs.getInt(1);
// String name = rs.getString("name");
String name = rs.getString(2);
// int age = rs.getInt("age");
int age = rs.getInt(3);
return new Student(id, name, age);
}
});
return student;
}
public Student queryForObject5(int id) {
String sql = "select id, name, age from student where id=?";
Student student = jdbcTemplate.queryForObject(sql, new Object[] { id },
new RowMapper<Student>() {
public Student mapRow(ResultSet rs, int rowNum)
throws SQLException {
int id = rs.getInt(1);
String name = rs.getString(2);
int age = rs.getInt(3);
return new Student(id, name, age);
}
});
return student;
}
public Student queryForObject6(int id) {
String sql = "select id, name, age from student where id=?";
Student student = jdbcTemplate.queryForObject(sql, new Object[] { id },
new int[] { java.sql.Types.INTEGER }, new RowMapper<Student>() {
public Student mapRow(ResultSet rs, int rowNum)
throws SQLException {
int id = rs.getInt(1);
String name = rs.getString(2);
int age = rs.getInt(3);
return new Student(id, name, age);
}
});
return student;
}
public void truncateTable() {
String sql = "truncate table student";
jdbcTemplate.execute(sql);
}
}
package edu.xmu.jdbc.dao;
import java.util.ArrayList;
import java.util.List;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import edu.xmu.jdbc.bean.Student;
public class QueryForObjectTest {
private DriverManagerDataSource dataSource;
private String url = "jdbc:mysql://localhost:3306/jdbctest";
private String username = "root";
private String password = "root";
private QueryForObjectDao dao;
@Before
public void setUp() {
dataSource = new DriverManagerDataSource(url, username, password);
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dao = new QueryForObjectDao();
dao.setDataSource(dataSource);
List<Student> studentList = new ArrayList<Student>();
Student student = new Student("Davy", 24);
studentList.add(student);
dao.prepareData(studentList);
}
@Test
public void queryForObjectTest() {
Student student = dao.queryForObject();
System.out.println(student);
}
@Test
public void queryForObject2Test() {
Student student = dao.queryForObject2(1);
System.out.println(student);
}
@Test
public void queryForObject3Test() {
Student student = dao.queryForObject3(1);
System.out.println(student);
}
@Test
public void queryForObject4Test() {
Student student = dao.queryForObject4();
System.out.println(student);
}
@Test
public void queryForObject5Test() {
Student student = dao.queryForObject5(1);
System.out.println(student);
}
@Test
public void queryForObject6Test() {
Student student = dao.queryForObject6(1);
System.out.println(student);
}
@After
public void tearDown() {
dao.truncateTable();
}
}
3. queryForList
// Return a list of Map, with the key of column name, and value of column value. // The methods below are especially userful when we don't have a domain model. public List<Map<String, Object>> queryForList(String sql); public List<Map<String, Object>> queryForList(String sql, Object... args); public List<Map<String, Object>> queryForList(String sql, Object[] args, int[] argTypes); // Return a list of Object, with the type of elementType. // This method is meant to be a single column query. // And the elementType can be only java embedded type. public <T> List<T> queryForList(String sql, Class<T> elementType); public <T> List<T> queryForList(String sql, Object[] args, Class<T> elementType); public <T> List<T> queryForList(String sql, Class<T> elementType, Object... args); public <T> List<T> queryForList(String sql, Object[] args, int[] argTypes, Class<T> elementType); // Although this method is not queryForList, but it is meant for quering for a // list of customized element. public <T> List<T> query(String sql, RowMapper<T> rowMapper);
As we can see from API Doc:
1) If we want to return a list of primary element, we can use queryForList.
But if we need return a list of customized element, we can use query(sql, rowMapper) instead.
2) The first segment of methods are appropriate when you don't have a domain model.
They can be seen as an enhancement for queryForMap().
package edu.xmu.jdbc.dao;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import edu.xmu.jdbc.bean.Student;
public class QueryForListDao {
private DataSource dataSource;
private JdbcTemplate jdbcTemplate;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.jdbcTemplate = new JdbcTemplate(this.dataSource);
}
public void prepareData(List<Student> studentList) {
String sql = "insert into student(name, age) values (?, ?)";
for (Student student : studentList) {
jdbcTemplate
.update(sql,
new Object[] { student.getName(), student.getAge() },
new int[] { java.sql.Types.VARCHAR,
java.sql.Types.INTEGER });
}
}
public List<Map<String, Object>> queryForList(int id) {
String sql = "select id, name, age from student where id<=?";
List<Map<String, Object>> returnList = jdbcTemplate.queryForList(sql,
new Object[] { id });
return returnList;
}
public List<String> queryForList2(int id) {
String sql = "select name from student where id<=?";
List<String> returnList = jdbcTemplate.queryForList(sql,
new Object[] { id }, String.class);
return returnList;
}
/**
* Although query is not query for list, <br/>
* here it performs just like queryForList. <br/>
* And we use queryForList can never get a list of customized bean.
*
* @param id
* @return
*/
public List<Student> query(int id) {
String sql = "select id, name, age from student where id<=?";
List<Student> returnList = jdbcTemplate.query(sql, new Object[] { id },
new RowMapper<Student>() {
public Student mapRow(ResultSet rs, int rowNum)
throws SQLException {
int id = rs.getInt("id");
String name = rs.getString("name");
int age = rs.getInt("age");
return new Student(id, name, age);
}
});
return returnList;
}
public void truncateTable() {
String sql = "truncate table student";
jdbcTemplate.execute(sql);
}
}
package edu.xmu.jdbc.dao;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import edu.xmu.jdbc.bean.Student;
public class QueryForListTest {
private DriverManagerDataSource dataSource;
private String url = "jdbc:mysql://localhost:3306/jdbctest";
private String username = "root";
private String password = "root";
private QueryForListDao dao;
@Before
public void setUp() {
dataSource = new DriverManagerDataSource(url, username, password);
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dao = new QueryForListDao();
dao.setDataSource(dataSource);
List<Student> studentList = new ArrayList<Student>();
Student student = new Student("Davy", 24);
studentList.add(student);
student = new Student("Jones", 25);
studentList.add(student);
dao.prepareData(studentList);
}
@Test
public void queryForListTest() {
List<Map<String, Object>> resultList = dao.queryForList(2);
for (Map<String, Object> resultMap : resultList) {
Set<Map.Entry<String, Object>> entrySet = resultMap.entrySet();
for (Map.Entry<String, Object> entry : entrySet) {
System.out.println(entry.getKey() + " = " + entry.getValue());
}
}
}
@Test
public void queryForList2Test() {
List<String> nameList = dao.queryForList2(2);
for (String name : nameList) {
System.out.println("name = " + name);
}
}
@Test
public void queryForList3Test() {
List<Student> studentList = dao.query(2);
for (Student student : studentList) {
System.out.println(student);
}
}
@After
public void tearDown() {
dao.truncateTable();
}
}
4. query
// ResultSetExtractor public <T> T query(final String sql, final ResultSetExtractor<T> rse); public <T> T query(String sql, Object[] args, ResultSetExtractor<T> rse); public <T> T query(String sql, Object[] args, int[] argTypes, ResultSetExtractor<T> rse); // RowMapper public <T> List<T> query(String sql, RowMapper<T> rowMapper) public <T> List<T> query(String sql, Object[] args, RowMapper<T> rowMapper); public <T> List<T> query(String sql, Object[] args, int[] argTypes, RowMapper<T> rowMapper); // RowCallBackHandler public void query(String sql, RowCallbackHandler rch); public void query(String sql, Object[] args, RowCallbackHandler rch); public void query(String sql, Object[] args, int[] argTypes, RowCallbackHandler rch);
We need to know the different representation of ResultSetExtractor & RowMapper & RowCallBackHandler
1> Example for ResultSetExtractor
2> Example for RowMapper
3> Example for RowCallbackHandler
package edu.xmu.jdbc.dao;
import java.sql.ResultSet;
import java.sql.SQLException;
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.JdbcTemplate;
import org.springframework.jdbc.core.ResultSetExtractor;
import org.springframework.jdbc.core.RowMapper;
import edu.xmu.jdbc.bean.Student;
public class QueryDao {
private DataSource dataSource;
private JdbcTemplate jdbcTemplate;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.jdbcTemplate = new JdbcTemplate(this.dataSource);
}
public void prepareData(List<Student> studentList) {
String sql = "insert into student(name, age) values (?, ?)";
for (Student student : studentList) {
jdbcTemplate
.update(sql,
new Object[] { student.getName(), student.getAge() },
new int[] { java.sql.Types.VARCHAR,
java.sql.Types.INTEGER });
}
}
/**
* If we want to get a Map<Integer, Student> <br/>
* Key: StudentId, as it is identical <br/>
* Value: Student <br/>
*
* The problem is that if we use query(), <br/>
* we will get List<Map<Integer, Student>> <br/>
* Then we have to convert this structure to single map. <br/>
*
* With ResultSetExtractor, we can avoid convertion <br/>
*
* @param id
*/
public Map<Integer, Student> queryWithResultSetExtractor(int id) {
String sql = "select id, name, age from student where id <= ?";
return jdbcTemplate.query(sql, new Object[] { id },
new ResultSetExtractor<Map<Integer, Student>>() {
public Map<Integer, Student> extractData(ResultSet rs)
throws SQLException, DataAccessException {
Map<Integer, Student> studentMap = new HashMap<Integer, Student>();
while (rs.next()) {
int id = rs.getInt("id");
String name = rs.getString("name");
int age = rs.getInt("age");
Student student = new Student(id, name, age);
studentMap.put(id, student);
}
return studentMap;
}
});
}
/**
* Here we user RowMapper as a comparator with previous one. <br/>
* We are sure that every map inside the list have only one entry. <br/>
*
* @param id
* @return
*/
public List<Map<Integer, Student>> queryWithRowMapper(int id) {
String sql = "select id, name, age from student where id<=?";
return jdbcTemplate.query(sql, new Object[] { id },
new RowMapper<Map<Integer, Student>>() {
public Map<Integer, Student> mapRow(ResultSet rs, int rowNum)
throws SQLException {
Map<Integer, Student> map = new HashMap<Integer, Student>();
int id = rs.getInt(1);
String name = rs.getString(2);
int age = rs.getInt(3);
Student student = new Student(id, name, age);
map.put(id, student);
return map;
}
});
}
public void truncateTable() {
String sql = "truncate table student";
jdbcTemplate.execute(sql);
}
}
package edu.xmu.jdbc.dao;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import edu.xmu.jdbc.bean.Student;
public class QueryDaoTest {
private DriverManagerDataSource dataSource;
private String url = "jdbc:mysql://localhost:3306/jdbctest";
private String username = "root";
private String password = "root";
private QueryDao dao;
@Before
public void setUp() {
dataSource = new DriverManagerDataSource(url, username, password);
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dao = new QueryDao();
dao.setDataSource(dataSource);
List<Student> studentList = new ArrayList<Student>();
Student student = new Student("Davy", 24);
studentList.add(student);
student = new Student("Jones", 25);
studentList.add(student);
dao.prepareData(studentList);
}
@Test
public void queryWithResultSetExtractorTest() {
Map<Integer, Student> studentMap = dao.queryWithResultSetExtractor(2);
Set<Entry<Integer, Student>> entrySet = studentMap.entrySet();
for (Entry<Integer, Student> entry : entrySet) {
int id = entry.getKey();
Student student = entry.getValue();
System.out.println("ID: " + id + ", Student: " + student);
}
}
@Test
public void queryWithRowMapperTest() {
List<Map<Integer, Student>> list = dao.queryWithRowMapper(2);
for (Map<Integer, Student> map : list) {
Set<Entry<Integer, Student>> set = map.entrySet();
for (Entry<Integer, Student> entry : set) {
int id = entry.getKey();
Student student = entry.getValue();
System.out.println("ID: " + id + ", Student: " + student);
}
}
}
@After
public void tearDown() {
dao.truncateTable();
}
}
5. update
public int update(final String sql); public int update(String sql, Object... args); public int update(String sql, Object[] args, int[] argTypes);
1) Update can be used for CUD operation.
2) Return int represents the number of rows affected
package edu.xmu.jdbc.dao;
import java.util.List;
import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
import edu.xmu.jdbc.bean.Student;
public class UpdateDao {
private DataSource dataSource;
private JdbcTemplate jdbcTemplate;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.jdbcTemplate = new JdbcTemplate(this.dataSource);
}
public void prepareData(List<Student> studentList) {
String sql = "insert into student(name, age) values (?, ?)";
for (Student student : studentList) {
jdbcTemplate
.update(sql,
new Object[] { student.getName(), student.getAge() },
new int[] { java.sql.Types.VARCHAR,
java.sql.Types.INTEGER });
}
}
public void updateForUpdate(int id, Student student) {
String name = student.getName();
int age = student.getAge();
String sql = "update student set name=?, age=? where id=?";
jdbcTemplate.update(sql, new Object[] { name, age, id });
}
public void updateForDelete(int id) {
String sql = "delete from student where id=?";
jdbcTemplate.update(sql, new Object[] { id });
}
public void truncateTable() {
String sql = "truncate table student";
jdbcTemplate.execute(sql);
}
}
package edu.xmu.jdbc.dao;
import java.util.ArrayList;
import java.util.List;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import edu.xmu.jdbc.bean.Student;
public class UpdateDaoTest {
private DriverManagerDataSource dataSource;
private String url = "jdbc:mysql://localhost:3306/jdbctest";
private String username = "root";
private String password = "root";
private UpdateDao dao;
@Before
public void setUp() {
dataSource = new DriverManagerDataSource(url, username, password);
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dao = new UpdateDao();
dao.setDataSource(dataSource);
List<Student> studentList = new ArrayList<Student>();
Student student = new Student("Davy", 24);
studentList.add(student);
student = new Student("Jones", 25);
studentList.add(student);
dao.prepareData(studentList);
}
@Test
public void updateForUpdateTest() {
int id = 1;
String updatedName = "Caly";
int updatedAge = 22;
Student student = new Student(updatedName, updatedAge);
dao.updateForUpdate(id, student);
}
@Test
public void updateForDeleteTest() {
dao.updateForDelete(2);
}
@After
public void tearDown() {
dao.truncateTable();
}
}
6. Depreciated methods
@Deprecated public int queryForInt(String sql); @Deprecated public int queryForInt(String sql, Object... args); @Deprecated public int queryForInt(String sql, Object[] args, int[] argTypes) @Deprecated public long queryForLong(String sql); @Deprecated public long queryForLong(String sql, Object... args); @Deprecated public long queryForLong(String sql, Object[] args, int[] argTypes)
We can find the reason why they are depreciated by following url listed below.
7. DDL Execution
// This method is often used for DDL statements public void execute(final String sql);
As we can infer from the official document that as convention, we use execute(String) method to execute ddl.
But executing DDL programatically is depreciated.
It is a good practice to only execute CRUD in program and left DDL to be executed by DBA.
package edu.xmu.jdbc.dao;
import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
public class DDLDao {
private DataSource dataSource;
private JdbcTemplate jdbcTemplate;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.jdbcTemplate = new JdbcTemplate(this.dataSource);
}
public void createTable() {
String sql = "create table student_bak (id int primary key auto_increment, name varchar(100), age int)";
jdbcTemplate.execute(sql);
}
public void deleteTable() {
String sql = "drop table student_bak";
jdbcTemplate.execute(sql);
}
public void alterTable() {
String sql = "alter table student_bak add score decimal, add gender varchar(100)";
jdbcTemplate.execute(sql);
}
}
package edu.xmu.jdbc.dao;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
public class DDLDaoTest {
private DriverManagerDataSource dataSource;
private String url = "jdbc:mysql://localhost:3306/jdbctest";
private String username = "root";
private String password = "root";
private DDLDao dao;
@Before
public void setUp() {
dataSource = new DriverManagerDataSource(url, username, password);
dataSource.setDriverClassName("com.mysql.jdbc.Driver");
dao = new DDLDao();
dao.setDataSource(dataSource);
}
@Test
public void createTableTest() {
dao.createTable();
}
@Test
@Ignore
public void deleteTableTest() {
dao.deleteTable();
}
@Test
public void alterTableTest() {
dao.alterTable();
}
}
Reference Links:
1) http://stackoverflow.com/questions/15661313/jdbctemplate-queryforint-long-is-deprecated-in-spring-3-2-2-what-should-it-be-r Why queryForInt/Long are depreciated?
2) http://docs.spring.io/spring/docs/3.1.x/spring-framework-reference/html/jdbc.html Spring JDBC Template official document.
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