如何在Spring jdbcTemplate中将Array/List设置为参数? [英] How set Array/List in Spring jdbcTemplate as parameter?

问题描述

我有很多占位符'?'的SQL查询，该占位符是动态生成的，我想放置值数组来替换占位符.数组的大小每次都可以不同.数组按顺序由所有参数组成.

I have SQL query with many placeholders '?', that builds dynamically, I want to put array of values to replace placeholders. Size of array can be different every time. Array consists from all parameters in order.

return jdbcTemplate.query(Queries.someQuery,
    new Object[] {/* Array must be here */},
    new ResultSetExtractor<List<String>>() {
        @Override
        public List<String> extractData(ResultSet resultSet) 
        }
    });

sql代的示例:

for (int j = 0; j < y; j++) {
        conditionsBuilder.append("\n and p"+i+".object_id=o.object_id\n" +
                "    and p"+i+".attr_id =?\n" +
                "    and p"+i+".value =?\n");
        tablesBuilder.append(",patameters p"+i+" ");
        i++;
    }

推荐答案

使用ArrayList:

ArrayList<Object> values = new ArrayList<>;

在您的for循环中，应按在查询中出现的顺序添加值:

In your for loop you should add the values in the order they appear in the query:

values.add(value);

然后将其转换为数组:

return jdbcTemplate.query(query, values.toArray(), resultSetExtractor);

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