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使用Spring整合
@Resource JdbcTemplate tm; /** * * @Title: save * @Description: 批量保存,批量删除与此方法类似 * @author * @param * @return void 返回类型 * @throws */ @Test public void save() { final List<Student> list = new ArrayList<Student>(); Student s = new Student(); s.setName("小明1212123"); Student s2 = new Student(); s2.setName("小明123fdfd"); Student s3 = new Student(); s3.setName("小明123adsaa"); list.add(s); list.add(s2); list.add(s3); String sql = "insert into student(name) values (?)"; tm.batchUpdate(sql, new BatchPreparedStatementSetter() { @Override public void setValues(PreparedStatement ps, int i) throws SQLException { ps.setString(1, list.get(i).getName()); } @Override public int getBatchSize() { return list.size(); } }); } /** * * @Title: find * @Description: 查询结果返回实体list 第一种方式 * @author * @param * @return void 返回类型 * @throws */ @SuppressWarnings("unchecked") @Test public void find() { String sql = "select * from student where name=?"; List<Student> list = tm.query(sql, new String[] { "小明" }, new BeanPropertyRowMapper(Student.class)); for (int i = 0; i < list.size(); i++) { System.out.println(list.get(i).getName()); } } /** * * @Title: findEntityList * @Description: 查询结果返回实体list 第二种方式,此处的实体类Student需要实现RowMapper接口 * @author * @param * @return void 返回类型 * @throws */ @Test public void findEntityList() { test_trans String sql = "select id,name from student"; List<Student> list = tm.query(sql, new Student()); for (int i = 0; i < list.size(); i++) { Student s = list.get(i); System.out.println(s.getId() + ">>>>>>>" + s.getName()); } } /** * * @Title: findEntityListWhere * @Description: 通过条件查询数据 * @author * @param * @return void 返回类型 * @throws */ @Test public void findEntityListWhere() { String sql = "select id,name from student where id=?"; List<Student> list = tm.query(sql, new Object[] { 1 }, new Student()); for (int i = 0; i < list.size(); i++) { Student s = list.get(i); System.out.println(s.getId() + ">>>>>>>" + s.getName()); } } /** * * @Title: findEntity * @Description: 查询结果返回单个实体 * @author * @param * @return void 返回类型 * @throws */ @Test public void findEntity() { String sql = "select id,name from student where id=1"; Student s = tm.queryForObject(sql, new Student()); System.out.println(s.getId() + ">>>>>>>" + s.getName()); } /** * * @Title: findMap * @Description: 查询结果返回map * @author * @param * @return void 返回类型 * @throws */ @Test public void findMap() { String sql = "select * from student"; List<Map<String, Object>> list = tm.queryForList(sql); for (int i = 0; i < list.size(); i++) { Map<String, Object> map = list.get(i); System.out.println(map.get("id") + ">>>>>>" + map.get("name")); } } /** * * @Title: count * @Description: 统计数量 * @author * @param * @return void 返回类型 * @throws */ @Test public void count() { String sql = "select count(*) as 'count' from student"; Map<String, Object> map = tm.queryForMap(sql); System.out.println("共找到>>>>>>>>>>:" + map.get("count") + "条数据"); }
实体Student类
import java.sql.ResultSet; import java.sql.SQLException; import javax.persistence.Transient; import org.springframework.jdbc.core.RowMapper; public class Student implements RowMapper<Student> { private Integer id; private String name; private String nothing; public Integer getId() { return this.id; } public void setId(Integer id) { this.id = id; } public String getName() { return this.name; } public void setName(String name) { this.name = name; } @Transient public String getNothing() { return this.nothing; } public void setNothing(String nothing) { this.nothing = nothing; } @Override public Student mapRow(ResultSet rs, int num) throws SQLException { // TODO Auto-generated method stub Student s = new Student(); try { s.setId(rs.getInt("id")); s.setName(rs.getString("name")); s.setNothing(rs.getString("nothing")); } catch (Exception e) { // TODO: handle exception } return s; } }