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1、execute()方法執(zhí)行SQL語(yǔ)句 jdbcTemplate.execute("CREATE TABLE USER (user_id integer, name varchar(100))"); jdbcTemplate.execute("CREATE TABLE USER (user_id integer, name varchar(100))");2、update()方法執(zhí)行UPDATE或INSERT語(yǔ)句 jdbcTemplate.update("UPDATE USER SET name = ? WHERE user_id = ?", new Object[] {name, id}); jdbcTemplate.update("INSERT INTO USER VALUES(?, ?, ?, ?)", new Object[] {user.getId(), user.getName(), user.getSex(), user.getAge()}); 或 jdbcTemplate.update("INSERT INTO USER VALUES(?, ?, ?, ?)", new PreparedStatementSetter() { public void setValues(PreparedStatement ps) throws SQLException { ps.setString(1, user.getId()); ps.setString(2, user.getName()); ps.setString(3, user.getSex() ); ps.setInt(4, user.getAge()); } }); jdbcTemplate.update("INSERT INTO USER VALUES(?, ?, ?, ?)", new Object[] {user.getId(), user.getName(), user.getSex(), user.getAge()});
3、queryForXXX()方法執(zhí)行查詢（注意返回值） --內(nèi)部執(zhí)行的是queryForObject(sql, rowMapper)； //僅有SQL情況 int count = jdbcTemplate.queryForInt("SELECT COUNT(*) FROM USER"); List<Map> rows = jdbcTemplate.queryForList("SELECT * FROM USER"); for(Map userMap:rows){ System.out.print(userMap.get("user_id") + "\t"); System.out.print(userMap.get("name") + "\t"); System.out.print(userMap.get("sex") + "\t"); System.out.println(userMap.get("age") + "\t"); } //帶參數(shù)的SQL情況，這里name字段類(lèi)型是字符串 String name = (String) jdbcTemplate.queryForObject("SELECT name FROM USER “ +" WHERE user_id = ?", new Object[] {id}, java.lang.String.class); //帶參數(shù)的SQL情況，這里* 類(lèi)型是POJO類(lèi)類(lèi)型 Person p= (Person) jdbcTemplate.queryForObject("select * from person where id = 8", new RowMapper (){ public Object mapRow(ResultSet rs, int value) throws SQLException { Person person = new Person (); person.setId(new Integer(rs.getInt("id"))); person.setUsername(rs.getString("username")); person.setAge(rs.getString("age")); return user; } }); 4、query()方法執(zhí)行查詢 User user = new User(); jdbcTemplate.query("SELECT * FROM USER WHERE user_id = ?",new Object[] {id}, new RowCallbackHandler() { public void processRow(ResultSet rs) throws SQLException { user.setId(rs.getString("user_id")); user.setName(rs.getString("name")); user.setSex(rs.getString("sex").charAt(0)); user.setAge(rs.getInt("age")); } }); final User user = new User();
jdbcTemplate.query("SELECT * FROM USER WHERE user_id = ?",
new Object[] {id},
new RowCallbackHandler() {
public void processRow(ResultSet rs) throws SQLException {
user.setId(rs.getString("user_id"));
user.setName(rs.getString("name"));
user.setSex(rs.getString("sex").charAt(0));
user.setAge(rs.getInt("age"));
}
});
lst = jdbcTemplate.query("SELECT * FROM USER WHERE user_id = ?",new Object[] {id}, new RowMapper(){ public Map mapRow(ResultSet rs, int arg1) throws SQLException { Map m = new HashMap(); m.put("user_id", rs.getObject("user_id")); m.put("name", rs.getObject("name")); m.put("sex", rs.getObject("sex")); m.put("age", rs.getObject("age")); return m; } });
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來(lái)自： 昵稱16088576 > 《JAVA筆記》
