Sample code for Spring JDBC examples.

2015-01-20 13:54:28 +05:30
parent abbfc01105
commit 17d3934094
10 changed files with 438 additions and 1 deletions
@@ -0,0 +1,23 @@
+package org.baeldung.jdbc;
+
+import java.sql.SQLException;
+
+import org.springframework.dao.DataAccessException;
+import org.springframework.dao.DuplicateKeyException;
+import org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator;
+
+public class CustomSQLErrorCodeTranslator extends
+SQLErrorCodeSQLExceptionTranslator {
+
+    @Override
+    protected DataAccessException customTranslate(final String task,
+	    final String sql, final SQLException sqlException) {
+	if (sqlException.getErrorCode() == -104) {
+	    return new DuplicateKeyException(
+		    "Custome Exception translator - Integrity contraint voilation.",
+		    sqlException);
+	}
+	return null;
+    }
+
+}
@@ -0,0 +1,44 @@
+package org.baeldung.jdbc;
+
+public class Employee {
+    private int id;
+
+    private String firstName;
+
+    private String lastName;
+
+    private String address;
+
+    public int getId() {
+	return id;
+    }
+
+    public void setId(final int id) {
+	this.id = id;
+    }
+
+    public String getFirstName() {
+	return firstName;
+    }
+
+    public void setFirstName(final String firstName) {
+	this.firstName = firstName;
+    }
+
+    public String getLastName() {
+	return lastName;
+    }
+
+    public void setLastName(final String lastName) {
+	this.lastName = lastName;
+    }
+
+    public String getAddress() {
+	return address;
+    }
+
+    public void setAddress(final String address) {
+	this.address = address;
+    }
+
+}
@@ -0,0 +1,132 @@
+package org.baeldung.jdbc;
+
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import javax.sql.DataSource;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.jdbc.core.BatchPreparedStatementSetter;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.jdbc.core.namedparam.BeanPropertySqlParameterSource;
+import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
+import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;
+import org.springframework.jdbc.core.namedparam.SqlParameterSource;
+import org.springframework.jdbc.core.namedparam.SqlParameterSourceUtils;
+import org.springframework.jdbc.core.simple.SimpleJdbcInsert;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class EmployeeDAO {
+
+    private JdbcTemplate jdbcTemplate;
+
+    private NamedParameterJdbcTemplate namedParameterJdbcTemplate;
+
+    private SimpleJdbcInsert simpleJdbcInsert;
+
+    @Autowired
+    public void setDataSource(final DataSource dataSource) {
+	jdbcTemplate = new JdbcTemplate(dataSource);
+	final CustomSQLErrorCodeTranslator customSQLErrorCodeTranslator = new CustomSQLErrorCodeTranslator();
+	jdbcTemplate.setExceptionTranslator(customSQLErrorCodeTranslator);
+
+	namedParameterJdbcTemplate = new NamedParameterJdbcTemplate(dataSource);
+	simpleJdbcInsert = new SimpleJdbcInsert(dataSource)
+	.withTableName("EMPLOYEE");
+
+    }
+
+    public int getCountOfEmployees() {
+	return jdbcTemplate.queryForObject("SELECT COUNT(*) FROM EMPLOYEE",
+		Integer.class);
+    }
+
+    public List<Employee> getAllEmployees() {
+	return jdbcTemplate.query("SELECT * FROM EMPLOYEE",
+		new EmployeeRowMapper());
+    }
+
+    public int addEmplyee(final int id) {
+	return jdbcTemplate.update("INSERT INTO EMPLOYEE VALUES (?, ?, ?, ?)",
+		id, "Bill", "Gates", "USA");
+    }
+
+    public int addEmplyeeUsingSimpelJdbcInsert(final Employee emp) {
+	final Map<String, Object> parameters = new HashMap<String, Object>();
+	parameters.put("ID", emp.getId());
+	parameters.put("FIRST_NAME", emp.getFirstName());
+	parameters.put("LAST_NAME", emp.getLastName());
+	parameters.put("ADDRESS", emp.getAddress());
+
+	return simpleJdbcInsert.execute(parameters);
+    }
+
+    public Employee getEmployee(final int id) {
+	final String query = "SELECT * FROM EMPLOYEE WHERE ID = ?";
+	return jdbcTemplate.queryForObject(query, new Object[] { id },
+		new EmployeeRowMapper());
+    }
+
+    public void addEmplyeeUsingExecuteMethod() {
+	jdbcTemplate
+	.execute("INSERT INTO EMPLOYEE VALUES (6, 'Bill', 'Gates', 'USA')");
+    }
+
+    public String getEmployeeUsingMapSqlParameterSource() {
+	final SqlParameterSource namedParameters = new MapSqlParameterSource()
+	.addValue("id", 1);
+
+	return namedParameterJdbcTemplate.queryForObject(
+		"SELECT FIRST_NAME FROM EMPLOYEE WHERE ID = :id",
+		namedParameters, String.class);
+    }
+
+    public int getEmployeeUsingBeanPropertySqlParameterSource() {
+	final Employee employee = new Employee();
+	employee.setFirstName("James");
+
+	final String SELECT_BY_ID = "SELECT COUNT(*) FROM EMPLOYEE WHERE FIRST_NAME = :firstName";
+
+	final SqlParameterSource namedParameters = new BeanPropertySqlParameterSource(
+		employee);
+
+	return namedParameterJdbcTemplate.queryForObject(SELECT_BY_ID,
+		namedParameters, Integer.class);
+    }
+
+    public int[] batchUpdateUsingJDBCTemplate(final List<Employee> employees) {
+	return jdbcTemplate.batchUpdate(
+		"INSERT INTO EMPLOYEE VALUES (?, ?, ?, ?)",
+		new BatchPreparedStatementSetter() {
+
+		    @Override
+		    public void setValues(final PreparedStatement ps,
+			    final int i) throws SQLException {
+			ps.setInt(1, employees.get(i).getId());
+			ps.setString(2, employees.get(i).getFirstName());
+			ps.setString(3, employees.get(i).getLastName());
+			ps.setString(4, employees.get(i).getAddress());
+		    }
+
+		    @Override
+		    public int getBatchSize() {
+			return 3;
+		    }
+		});
+    }
+
+    public int[] batchUpdateUsingNamedParameterJDBCTemplate(
+	    final List<Employee> employees) {
+	final SqlParameterSource[] batch = SqlParameterSourceUtils
+		.createBatch(employees.toArray());
+	final int[] updateCounts = namedParameterJdbcTemplate
+		.batchUpdate(
+			"INSERT INTO EMPLOYEE VALUES (:id, :firstName, :lastName, :address)",
+			batch);
+	return updateCounts;
+    }
+}
@@ -0,0 +1,22 @@
+package org.baeldung.jdbc;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+import org.springframework.jdbc.core.RowMapper;
+
+public class EmployeeRowMapper implements RowMapper<Employee> {
+
+    @Override
+    public Employee mapRow(final ResultSet rs, final int rowNum)
+	    throws SQLException {
+	final Employee employee = new Employee();
+
+	employee.setId(rs.getInt("ID"));
+	employee.setFirstName(rs.getString("FIRST_NAME"));
+	employee.setLastName(rs.getString("LAST_NAME"));
+	employee.setAddress(rs.getString("ADDRESS"));
+
+	return employee;
+    }
+}
@@ -0,0 +1,34 @@
+package org.baeldung.jdbc.config;
+
+import javax.sql.DataSource;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.jdbc.datasource.DriverManagerDataSource;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseBuilder;
+import org.springframework.jdbc.datasource.embedded.EmbeddedDatabaseType;
+
+@Configuration
+@ComponentScan("org.baeldung.jdbc")
+public class SpringJdbcConfig {
+
+    @Bean
+    public DataSource dataSource() {
+	return new EmbeddedDatabaseBuilder().setType(EmbeddedDatabaseType.HSQL)
+		.addScript("classpath:jdbc/schema.sql")
+		.addScript("classpath:jdbc/test-data.sql").build();
+    }
+
+    // @Bean
+    public DataSource mysqlDataSource() {
+	final DriverManagerDataSource dataSource = new DriverManagerDataSource();
+	dataSource.setDriverClassName("com.mysql.jdbc.Driver");
+	dataSource.setUrl("jdbc:mysql://localhost:3306/springjdbc");
+	dataSource.setUsername("guest_user");
+	dataSource.setPassword("guest_password");
+
+	return dataSource;
+    }
+
+}