Oracle PLSQL Apex 中的嵌套列表 JSON 解析

问题描述

--设置服务器输出；

DECLARE
    p_json                 CLOB := '
  {
    "value": [
        {
            "id": "AAMkADFjOTE3MDZmLTY3YWMtNDA0ZS05OWNmLWNmM","ccRecipients": [
                {
                    "emailAddress": {
                        "name": "Sudip Dutta","address": "[email protected]"
                    }
                },{
                    "emailAddress": {
                        "name": "D Roy","address": "[email protected]"
                    }
                }
            ]
        }
    ]
}'
    ;
    l_cc_email_address     VARCHAR2(2000);
    l_cc_email_addresses   VARCHAR2(4000);
    l_message_id           VARCHAR2(4000);
BEGIN
    apex_json.parse(p_json);
    FOR cc_email_counter IN 1..apex_json.get_count(p_path => 'value.ccRecipients') LOOP
        l_cc_email_address := NULL;
        l_cc_email_address := apex_json.get_varchar2(p_path => 
           'value[%d].ccRecipients[%d].emailAddress.address',p0 => cc_email_counter
        );
        dbms_output.put_line('New Iteration l_cc_email_addresses   :-   ' || l_cc_email_address);
    END LOOP;
END;

我正在尝试解析上面的 json 并想在循环中打印“地址”标签值。不能做同样的事情。上面的代码我试过了。请帮忙。

解决方法

"value" 是一个元素数组 []，其中包含一个元素 - 您需要在 apex_json.get_count 函数中选择第一个数组元素。

set serveroutput on size 999999
clear screen
DECLARE
  l_json_text CLOB;
  l_json_values    apex_json.t_values;

BEGIN 
l_json_text := '
  {
    "value": [
        {
            "id": "AAMkADFjOTE3MDZmLTY3YWMtNDA0ZS05OWNmLWNmM","ccRecipients": [
                {
                    "emailAddress": {
                        "name": "Sudip Dutta","address": "[email protected]"
                    }
                },{
                    "emailAddress": {
                        "name": "D Roy","address": "[email protected]"
                    }
                }
            ]
        }
    ]
}
';

  apex_json.parse(
    p_values => l_json_values,p_source => l_json_text
  );

  FOR r IN 1 .. APEX_JSON.get_count(p_path => 'value[1].ccRecipients',p_values => l_json_values) LOOP
    DBMS_OUTPUT.put_line('email address: '||apex_json.get_varchar2(p_path => 'value[1].ccRecipients[%d].emailAddress.address',p0 => r,p_values => l_json_values));
  END LOOP;

END;
/

email address: [email protected]
email address: [email protected]