jdbcTemplate.update()的几种写法 以及NamedParameterJdbcTemplate

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api提供了update的几种调用写法

  //方法一直接在sql中拼接好了参数之后调用即可	
    @Override
	public int update(final String sql) throws DataAccessException {
		Assert.notNull(sql, "SQL must not be null");
		if (logger.isDebugEnabled()) {
			logger.debug("Executing SQL update [" + sql + "]");
		}

		class UpdateStatementCallback implements StatementCallback<Integer>, SqlProvider {
			@Override
			public Integer doInStatement(Statement stmt) throws SQLException {
				int rows = stmt.executeUpdate(sql);
				if (logger.isDebugEnabled()) {
					logger.debug("SQL update affected " + rows + " rows");
				}
				return rows;
			}
			@Override
			public String getSql() {
				return sql;
			}
		}

		return execute(new UpdateStatementCallback());
	}

    //方法二 使用占位符 多参数依次入参
	@Override
	public int update(String sql, Object... args) throws DataAccessException {
		return update(sql, newArgPreparedStatementSetter(args));
	}

    //方法三 实现回调接口PreparedStatementSetter 重写里面的方法
    @Override
	public int update(String sql, PreparedStatementSetter pss) throws DataAccessException {
		return update(new SimplePreparedStatementCreator(sql), pss);
	}
    
    //方法四 添加了第两个参数数组，用于显式的指定每个占位符所对应的字段数据类型
    @Override
	public int update(String sql, Object[] args, int[] argTypes) throws DataAccessException {
		return update(sql, newArgTypePreparedStatementSetter(args, argTypes));
	}

  @Autowired
  private JdbcTemplate jdbcTemplate;  
  
  @Transactional(rollbackFor=Exception.class)
    public void updateManegerSub(UpdateManagerParam updateManagerParam){

        StringBuffer sql = new StringBuffer("UPDATE pub_user SET account = ? ,phone = ? ,email = ? ," +
                "update_date = NOW() ,user_name = ? " );

        if (StringUtils.isNotEmpty(updateManagerParam.getPassword())){
            sql.append(" ,password = '" + updateManagerParam.getPassword() +"'");
        }
        sql.append("WHERE user_id = ? AND del_flag = ?");

        //方法一，将sql语句中的参数全部按照密码字段一样拼接好之后，直接调用此方法
        jdbcTemplate.update(sql.toString());
        
        //方法二 使用占位符 多参数依次入参
        jdbcTemplate.update(sql.toString() ,
                updateManagerParam.getAccount(),updateManagerParam.getPhone(),updateManagerParam.getEmail(),
                updateManagerParam.getUserName(),
                updateManagerParam.getUserId(),UserEntity.DEL_FLAG_NORMAL);

        //方法三 实现回调接口PreparedStatementSetter 重写里面的方法
        jdbcTemplate.update(sql.toString(), new PreparedStatementSetter() {
            @Override
            public void setValues(PreparedStatement ps) throws SQLException {
                ps.setString(1,updateManagerParam.getAccount());
                ps.setString(2,updateManagerParam.getPhone());
                ps.setString(3,updateManagerParam.getEmail());
                ps.setString(4,updateManagerParam.getUserName());
                ps.setLong(5,updateManagerParam.getUserId());
                ps.setString(6,UserEntity.DEL_FLAG_NORMAL);
            }
        });

        //方法四 添加了第两个参数数组，用于显式的指定每个占位符所对应的字段数据类型
        jdbcTemplate.update(sql.toString(),
                new Object[]{updateManagerParam.getAccount(),updateManagerParam.getPhone(),updateManagerParam.getEmail(),updateManagerParam.getUserName(),updateManagerParam.getUserId(),UserEntity.DEL_FLAG_NORMAL},
                new int[]{Types.VARCHAR,Types.VARCHAR,Types.VARCHAR,Types.VARCHAR,Types.BIGINT,Types.VARCHAR,}
                );

    }

若使用参数绑定，则需要使用 namedParameterJdbcTemplate    https://blog.csdn.net/u013468917/article/details/52219849

  @Autowired
  private NamedParameterJdbcTemplate namedParameterJdbcTemplate;

 @Transactional(rollbackFor=Exception.class)
    public void updateManegerSub(UpdateManagerParam updateManagerParam,Long roleId){

        Map<String ,Object> params = new HashMap<>();

        StringBuffer sql = new StringBuffer("UPDATE pub_user SET account = :account ,phone = :phone ,email = :email , " +
                "update_date = NOW() ,user_name = :user_name " );

        params.put("account",updateManagerParam.getAccount());
        params.put("phone",updateManagerParam.getPhone());
        params.put("email",updateManagerParam.getEmail());
        params.put("user_name",updateManagerParam.getUserName());

        if (StringUtils.isNotEmpty(updateManagerParam.getPassword())){
            sql.append(" ,password = :password ");
            params.put("password",updateManagerParam.getPassword());
        }
        sql.append("WHERE user_id = :user_id AND del_flag = :del_flag ");
        params.put("user_id",updateManagerParam.getUserId());
        params.put("del_flag",UserEntity.DEL_FLAG_NORMAL);

        namedParameterJdbcTemplate.update(sql.toString(),params);

    }