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Eugen
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Merge pull request eugenp#117 from mgooty/master
Sample code for Spring JDBC examples.
2 parents 9e1ae6d + 17d3934 commit 5bfbea1

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‎spring-all/pom.xml‎

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<version>${mysql-connector-java.version}</version>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>org.hsqldb</groupId>
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<artifactId>hsqldb</artifactId>
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<version>2.3.2</version>
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</dependency>
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<!-- validation -->
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<dependency>

‎spring-all/src/main/java/org/baeldung/jdbc/CustomSQLErrorCodeTranslator.java‎

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package org.baeldung.jdbc;
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import java.sql.SQLException;
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import org.springframework.dao.DataAccessException;
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import org.springframework.dao.DuplicateKeyException;
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import org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator;
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public class CustomSQLErrorCodeTranslator extends
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SQLErrorCodeSQLExceptionTranslator {
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@Override
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protected DataAccessException customTranslate(final String task,
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final String sql, final SQLException sqlException) {
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if (sqlException.getErrorCode() == -104) {
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return new DuplicateKeyException(
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"Custome Exception translator - Integrity contraint voilation.",
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sqlException);
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}
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return null;
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}
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}

‎spring-all/src/main/java/org/baeldung/jdbc/Employee.java‎

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package org.baeldung.jdbc;
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public class Employee {
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private int id;
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private String firstName;
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private String lastName;
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private String address;
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public int getId() {
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return id;
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}
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public void setId(final int id) {
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this.id = id;
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}
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public String getFirstName() {
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return firstName;
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}
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public void setFirstName(final String firstName) {
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this.firstName = firstName;
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}
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public String getLastName() {
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return lastName;
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}
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public void setLastName(final String lastName) {
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this.lastName = lastName;
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}
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public String getAddress() {
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return address;
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}
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public void setAddress(final String address) {
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this.address = address;
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}
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}

‎spring-all/src/main/java/org/baeldung/jdbc/EmployeeDAO.java‎

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package org.baeldung.jdbc;
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import java.sql.PreparedStatement;
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import java.sql.SQLException;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import javax.sql.DataSource;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.jdbc.core.BatchPreparedStatementSetter;
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import org.springframework.jdbc.core.JdbcTemplate;
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import org.springframework.jdbc.core.namedparam.BeanPropertySqlParameterSource;
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import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
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import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
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import org.springframework.jdbc.core.namedparam.SqlParameterSource;
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import org.springframework.jdbc.core.namedparam.SqlParameterSourceUtils;
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import org.springframework.jdbc.core.simple.SimpleJdbcInsert;
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import org.springframework.stereotype.Repository;
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@Repository
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public class EmployeeDAO {
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private JdbcTemplate jdbcTemplate;
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private NamedParameterJdbcTemplate namedParameterJdbcTemplate;
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private SimpleJdbcInsert simpleJdbcInsert;
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@Autowired
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public void setDataSource(final DataSource dataSource) {
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jdbcTemplate = new JdbcTemplate(dataSource);
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final CustomSQLErrorCodeTranslator customSQLErrorCodeTranslator = new CustomSQLErrorCodeTranslator();
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jdbcTemplate.setExceptionTranslator(customSQLErrorCodeTranslator);
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namedParameterJdbcTemplate = new NamedParameterJdbcTemplate(dataSource);
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simpleJdbcInsert = new SimpleJdbcInsert(dataSource)
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.withTableName("EMPLOYEE");
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}
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public int getCountOfEmployees() {
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return jdbcTemplate.queryForObject("SELECT COUNT(*) FROM EMPLOYEE",
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Integer.class);
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}
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public List<Employee> getAllEmployees() {
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return jdbcTemplate.query("SELECT * FROM EMPLOYEE",
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new EmployeeRowMapper());
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}
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public int addEmplyee(final int id) {
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return jdbcTemplate.update("INSERT INTO EMPLOYEE VALUES (?, ?, ?, ?)",
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id, "Bill", "Gates", "USA");
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}
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public int addEmplyeeUsingSimpelJdbcInsert(final Employee emp) {
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final Map<String, Object> parameters = new HashMap<String, Object>();
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parameters.put("ID", emp.getId());
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parameters.put("FIRST_NAME", emp.getFirstName());
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parameters.put("LAST_NAME", emp.getLastName());
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parameters.put("ADDRESS", emp.getAddress());
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return simpleJdbcInsert.execute(parameters);
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}
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public Employee getEmployee(final int id) {
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final String query = "SELECT * FROM EMPLOYEE WHERE ID = ?";
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return jdbcTemplate.queryForObject(query, new Object[] { id },
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new EmployeeRowMapper());
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}
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public void addEmplyeeUsingExecuteMethod() {
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jdbcTemplate
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.execute("INSERT INTO EMPLOYEE VALUES (6, 'Bill', 'Gates', 'USA')");
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}
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public String getEmployeeUsingMapSqlParameterSource() {
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final SqlParameterSource namedParameters = new MapSqlParameterSource()
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.addValue("id", 1);
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return namedParameterJdbcTemplate.queryForObject(
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"SELECT FIRST_NAME FROM EMPLOYEE WHERE ID = :id",
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namedParameters, String.class);
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}
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public int getEmployeeUsingBeanPropertySqlParameterSource() {
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final Employee employee = new Employee();
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employee.setFirstName("James");
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final String SELECT_BY_ID = "SELECT COUNT(*) FROM EMPLOYEE WHERE FIRST_NAME = :firstName";
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final SqlParameterSource namedParameters = new BeanPropertySqlParameterSource(
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employee);
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return namedParameterJdbcTemplate.queryForObject(SELECT_BY_ID,
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namedParameters, Integer.class);
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}
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public int[] batchUpdateUsingJDBCTemplate(final List<Employee> employees) {
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return jdbcTemplate.batchUpdate(
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"INSERT INTO EMPLOYEE VALUES (?, ?, ?, ?)",
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new BatchPreparedStatementSetter() {
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@Override
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public void setValues(final PreparedStatement ps,
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final int i) throws SQLException {
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ps.setInt(1, employees.get(i).getId());
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ps.setString(2, employees.get(i).getFirstName());
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ps.setString(3, employees.get(i).getLastName());
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ps.setString(4, employees.get(i).getAddress());
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}
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@Override
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public int getBatchSize() {
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return 3;
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}
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});
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}
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public int[] batchUpdateUsingNamedParameterJDBCTemplate(
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final List<Employee> employees) {
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final SqlParameterSource[] batch = SqlParameterSourceUtils
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.createBatch(employees.toArray());
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final int[] updateCounts = namedParameterJdbcTemplate
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.batchUpdate(
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"INSERT INTO EMPLOYEE VALUES (:id, :firstName, :lastName, :address)",
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batch);
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return updateCounts;
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}
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}

‎spring-all/src/main/java/org/baeldung/jdbc/EmployeeRowMapper.java‎

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package org.baeldung.jdbc;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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import org.springframework.jdbc.core.RowMapper;
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public class EmployeeRowMapper implements RowMapper<Employee> {
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@Override
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public Employee mapRow(final ResultSet rs, final int rowNum)
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throws SQLException {
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final Employee employee = new Employee();
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employee.setId(rs.getInt("ID"));
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employee.setFirstName(rs.getString("FIRST_NAME"));
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employee.setLastName(rs.getString("LAST_NAME"));
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employee.setAddress(rs.getString("ADDRESS"));
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return employee;
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}
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}

‎spring-all/src/main/java/org/baeldung/jdbc/config/SpringJdbcConfig.java‎

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package org.baeldung.jdbc.config;
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import javax.sql.DataSource;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.ComponentScan;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.jdbc.datasource.DriverManagerDataSource;
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import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
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import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
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@Configuration
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@ComponentScan("org.baeldung.jdbc")
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public class SpringJdbcConfig {
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@Bean
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public DataSource dataSource() {
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return new EmbeddedDatabaseBuilder().setType(EmbeddedDatabaseType.HSQL)
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.addScript("classpath:jdbc/schema.sql")
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.addScript("classpath:jdbc/test-data.sql").build();
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}
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// @Bean
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public DataSource mysqlDataSource() {
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final DriverManagerDataSource dataSource = new DriverManagerDataSource();
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dataSource.setDriverClassName("com.mysql.jdbc.Driver");
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dataSource.setUrl("jdbc:mysql://localhost:3306/springjdbc");
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dataSource.setUsername("guest_user");
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dataSource.setPassword("guest_password");
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return dataSource;
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}
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}

‎spring-all/src/main/resources/jdbc/schema.sql‎

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CREATE TABLE EMPLOYEE
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(
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ID int NOT NULL PRIMARY KEY,
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FIRST_NAME varchar(255),
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LAST_NAME varchar(255),
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ADDRESS varchar(255),
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);

‎spring-all/src/main/resources/jdbc/springJdbc-config.xml‎

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<?xml version="1.0" encoding="UTF-8"?>
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<beans xmlns="http://www.springframework.org/schema/beans"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
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xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.1.xsd
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http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.1.xsd">
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<bean id="employeeDao" class="org.baeldung.jdbc.EmployeeDAO">
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<property name="dataSource" ref="dataSource" />
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</bean>
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<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
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destroy-method="close">
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<property name="driverClassName" value="${jdbc.driverClassName}" />
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<property name="url" value="${jdbc.url}" />
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<property name="username" value="${jdbc.username}" />
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<property name="password" value="${jdbc.password}" />
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</bean>
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<context:property-placeholder location="jdbc.properties" />
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</beans>

‎spring-all/src/main/resources/jdbc/test-data.sql‎

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INSERT INTO EMPLOYEE VALUES (1, 'James', 'Gosling', 'Canada');
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INSERT INTO EMPLOYEE VALUES (2, 'Donald', 'Knuth', 'USA');
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INSERT INTO EMPLOYEE VALUES (3, 'Linus', 'Torvalds', 'Finland');
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INSERT INTO EMPLOYEE VALUES (4, 'Dennis', 'Ritchie', 'USA');

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