选择查询在哪里子句问题在SpringjdbcTem板

Question

公共类CountryMasterModel{私有字符串CountryName[]；

public String[] getCountryNames() {
    return countryNames;
}

public void setCountryNames(String[] countryNames) {
    this.countryNames = countryNames;
}

}

公共接口服务{

List<String> getCountryData(String compCode, CountryMasterModel model) throws SQLException, DataAccessException;

}

@组件公共类CountryMasterDAO实现CountryMasterService{

@Autowired
private JdbcTemplate template;

@Override
public List<String> getCountryData(CountryMasterModel model) throws SQLException, DataAccessException {
    this.template = new JdbcTemplate(DBMSSQL.getDBCon());
    System.out.println(template.getDataSource().getConnection().getCatalog());
    List<String> ids = Arrays.asList(model.getCountryNames());
    MapSqlParameterSource parameters = new MapSqlParameterSource();
    parameters.addValue("countryName", ids);
    List<String> list = new ArrayList<String>();
    list = this.template.query("SELECT NAME FROM country_master WHERE NAME IN (?)", new Object[] { ids },
            new CountryMasterResultSetExtrator());
    System.out.println("ids = " + ids);
    System.out.println("list = " + list.get(0));
    return list;
}

public static void main(String[] args) throws DataAccessException, SQLException {
    CountryMasterModel bean = new CountryMasterModel();
    String a[] = { "India", "Pakistan", "Russia", "America",};
    bean.setCountryNames(a);
    System.out.println(StringUtil.getStringArray(a));
    List<String> list = new CountryMasterDAO().getCountryData(bean);
    System.out.println("List Size = "+list.size());
}

}

在此输入图像描述

Answer 1

选中此行：

list = this.template.query(
          "SELECT NAME FROM country_master WHERE NAME IN (?)", 
           new Object[] { ids },
            new CountryMasterResultSetExtrator()
       );

（） 需要一个参数，新对象[]{ids}有3个参数。在（？，？）中尝试此名称

有关详细信息，请查看此链接：https://www.baeldung.com/spring-jdbctemplate-in-list