{"id":32473,"date":"2023-12-08T11:11:59","date_gmt":"2023-02-11T04:40:41","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%83%b3%e7%94%a8node-js%e5%a4%84%e7%90%86promise-mysql%ef%bc%8c%e5%9b%a0%e6%ad%a4%e7%94%a8%e8%87%aa%e5%b7%b1%e7%9a%84%e8%a7%82%e7%82%b9%e8%bf%9b%e8%a1%8c%e4%ba%86%e6%80%bb%e7%bb%93%e3%80%82\/"},"modified":"2024-05-04T12:39:22","modified_gmt":"2024-05-04T04:39:22","slug":"%e6%88%91%e6%83%b3%e7%94%a8node-js%e5%a4%84%e7%90%86promise-mysql%ef%bc%8c%e5%9b%a0%e6%ad%a4%e7%94%a8%e8%87%aa%e5%b7%b1%e7%9a%84%e8%a7%82%e7%82%b9%e8%bf%9b%e8%a1%8c%e4%ba%86%e6%80%bb%e7%bb%93%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e6%88%91%e6%83%b3%e7%94%a8node-js%e5%a4%84%e7%90%86promise-mysql%ef%bc%8c%e5%9b%a0%e6%ad%a4%e7%94%a8%e8%87%aa%e5%b7%b1%e7%9a%84%e8%a7%82%e7%82%b9%e8%bf%9b%e8%a1%8c%e4%ba%86%e6%80%bb%e7%bb%93%e3%80%82\/","title":{"rendered":"\u6211\u60f3\u7528Node.js\u5904\u7406promise-mysql\uff0c\u56e0\u6b64\u7528\u81ea\u5df1\u7684\u89c2\u70b9\u8fdb\u884c\u4e86\u603b\u7ed3"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u4f60\u597d\uff0c\u53c8\u662f\u6211\u3002
\n\u8fd9\u6b21\u6211\u60f3\u8981\u5c1d\u8bd5\u5904\u7406promise-mysql\u3002
\n\u50cf\u5f80\u5e38\u4e00\u6837\uff0c\u6211\u662f\u6478\u7d22\u7740\u3002<\/p>\n

\u4e3a\u4e86\u5728Node.js\u4e2d\u4f7f\u7528MySQL\uff0c\u6211\u7528\u81ea\u5df1\u7684\u89d2\u5ea6\u6574\u7406\u4e86\u5230\u8fbe\u8fd9\u91cc\u7684\u7ecf\u8fc7\u3002<\/p>\n

\u7b80\u5355\u7684\u64cd\u4f5c\u786e\u8ba4<\/h1>\n

\u8bbe\u5b9a<\/h2>\n
const<\/span> mysql<\/span> =<\/span> require<\/span>(<\/span>'<\/span>\/usr\/local\/lib\/node_modules\/promise-mysql<\/span>'<\/span>);<\/span>\r\n\r\nmysql<\/span>.<\/span>createConnection<\/span>({<\/span>\r\n    host<\/span>:<\/span> '<\/span>localhost<\/span>'<\/span>,<\/span>\r\n    user<\/span>:<\/span> '<\/span>root<\/span>'<\/span>,<\/span>\r\n    password<\/span>:<\/span> ''<\/span>,<\/span>\r\n    database<\/span>:<\/span> '<\/span>nodejs<\/span>'<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>conn<\/span>)<\/span> {<\/span>\r\n    \/\/ do stuff with conn<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>promise-mysql createConnection.<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>conn<\/span>);<\/span>\r\n    conn<\/span>.<\/span>end<\/span>();<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
\u9009\u62e9<\/h2>\n
const<\/span> mysql<\/span> =<\/span> require<\/span>(<\/span>'<\/span>\/usr\/local\/lib\/node_modules\/promise-mysql<\/span>'<\/span>);<\/span>\r\n\r\nmysql<\/span>.<\/span>createConnection<\/span>({<\/span>\r\n    host<\/span>:<\/span> '<\/span>localhost<\/span>'<\/span>,<\/span>\r\n    user<\/span>:<\/span> '<\/span>root<\/span>'<\/span>,<\/span>\r\n    password<\/span>:<\/span> ''<\/span>,<\/span>\r\n    database<\/span>:<\/span> '<\/span>nodejs<\/span>'<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>conn<\/span>)<\/span> {<\/span>\r\n    \/\/ do stuff with conn<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>promise-mysql createConnection.<\/span>'<\/span>);<\/span>\r\n    \/\/ console.log(conn);<\/span>\r\n\r\n    \/\/ select<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>'<\/span>SELECT * FROM node_mysql_test<\/span>'<\/span>);<\/span>\r\n    conn<\/span>.<\/span>end<\/span>();<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>rows<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>rows<\/span>);<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
const<\/span> mysql<\/span> =<\/span> require<\/span>(<\/span>'<\/span>\/usr\/local\/lib\/node_modules\/promise-mysql<\/span>'<\/span>);<\/span>\r\nlet<\/span> connection<\/span>;<\/span>\r\n\r\nmysql<\/span>.<\/span>createConnection<\/span>({<\/span>\r\n    host<\/span>:<\/span> '<\/span>localhost<\/span>'<\/span>,<\/span>\r\n    user<\/span>:<\/span> '<\/span>root<\/span>'<\/span>,<\/span>\r\n    password<\/span>:<\/span> ''<\/span>,<\/span>\r\n    database<\/span>:<\/span> '<\/span>nodejs<\/span>'<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>conn<\/span>)<\/span> {<\/span>\r\n    \/\/ do stuff with conn<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>promise-mysql createConnection.<\/span>'<\/span>);<\/span>\r\n    \/\/ console.log(conn);<\/span>\r\n    connection<\/span> =<\/span> conn<\/span>;<\/span>\r\n    \/\/ select<\/span>\r\n    const<\/span> result<\/span> =<\/span> connection<\/span>.<\/span>query<\/span>(<\/span>'<\/span>SELECT * FROM node_mysql_test<\/span>'<\/span>);<\/span>\r\n    connection<\/span>.<\/span>end<\/span>();<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>result<\/span>);<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>rows<\/span>)<\/span> {<\/span>\r\n    \/\/ result<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>SELECT is Success!<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>rows<\/span>);<\/span>\r\n}).<\/span>catch<\/span>(<\/span>function<\/span>(<\/span>error<\/span>)<\/span> {<\/span>\r\n    if<\/span> (<\/span>connection<\/span> &&<\/span> connection<\/span>.<\/span>end<\/span>)<\/span> connection<\/span>.<\/span>end<\/span>();<\/span>\r\n    \/\/logs out the error<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>catch error.<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>error<\/span>);<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
\u8bf7\u63d2\u5165<\/h2>\n
\/**\r\n * promise-mysql module\r\n * @type       {Object}\r\n *\/<\/span>\r\nconst<\/span> mysql<\/span> =<\/span> require<\/span>(<\/span>'<\/span>\/usr\/local\/lib\/node_modules\/promise-mysql<\/span>'<\/span>);<\/span>\r\n\/**\r\n * table name\r\n * @type       {string}\r\n *\/<\/span>\r\nconst<\/span> TABLE_NAME<\/span> =<\/span> '<\/span>node_mysql_test<\/span>'<\/span>;<\/span>\r\n\/**\r\n * connection\r\n * @type       {Object}\r\n *\/<\/span>\r\nlet<\/span> conn<\/span>;<\/span>\r\nlet<\/span> connection<\/span> =<\/span> mysql<\/span>.<\/span>createConnection<\/span>({<\/span>\r\n    host<\/span>:<\/span> '<\/span>localhost<\/span>'<\/span>,<\/span>\r\n    user<\/span>:<\/span> '<\/span>root<\/span>'<\/span>,<\/span>\r\n    password<\/span>:<\/span> ''<\/span>,<\/span>\r\n    database<\/span>:<\/span> '<\/span>nodejs<\/span>'<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>connect<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>promise-mysql connect.<\/span>'<\/span>);<\/span>\r\n    conn<\/span> =<\/span> connect<\/span>;<\/span>\r\n    \/\/ insert<\/span>\r\n    const<\/span> sql<\/span> =<\/span> '<\/span>INSERT INTO <\/span>'<\/span> +<\/span> TABLE_NAME<\/span> +<\/span> '<\/span> SET ?<\/span>'<\/span>;<\/span>\r\n    const<\/span> inserts<\/span> =<\/span> {<\/span>name<\/span>:<\/span> '<\/span>\u9df2\u5c3e\u96f7<\/span>'<\/span>};<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>sql<\/span>,<\/span> inserts<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>result<\/span>);<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>res<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>res<\/span>);<\/span>\r\n    \/\/ select<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>'<\/span>SELECT * FROM node_mysql_test<\/span>'<\/span>);<\/span>\r\n    conn<\/span>.<\/span>end<\/span>();<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>rows<\/span>)<\/span> {<\/span>\r\n    \/\/ select is success<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>SELECT is Success!<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>rows<\/span>);<\/span>\r\n}).<\/span>catch<\/span>(<\/span>function<\/span>(<\/span>error<\/span>)<\/span> {<\/span>\r\n    if<\/span> (<\/span>conn<\/span> &&<\/span> conn<\/span>.<\/span>end<\/span>)<\/span> conn<\/span>.<\/span>end<\/span>();<\/span>\r\n    \/\/logs out the error<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>catch error.<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>error<\/span>);<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
\u66f4\u65b0<\/h2>\n
\/**\r\n * promise-mysql module\r\n * @type       {Object}\r\n *\/<\/span>\r\nconst<\/span> mysql<\/span> =<\/span> require<\/span>(<\/span>'<\/span>\/usr\/local\/lib\/node_modules\/promise-mysql<\/span>'<\/span>);<\/span>\r\n\/**\r\n * table name\r\n * @type       {string}\r\n *\/<\/span>\r\nconst<\/span> TABLE_NAME<\/span> =<\/span> '<\/span>node_mysql_test<\/span>'<\/span>;<\/span>\r\n\/**\r\n * connection\r\n * @type       {Object}\r\n *\/<\/span>\r\nlet<\/span> conn<\/span>;<\/span>\r\nlet<\/span> connection<\/span> =<\/span> mysql<\/span>.<\/span>createConnection<\/span>({<\/span>\r\n    host<\/span>:<\/span> '<\/span>localhost<\/span>'<\/span>,<\/span>\r\n    user<\/span>:<\/span> '<\/span>root<\/span>'<\/span>,<\/span>\r\n    password<\/span>:<\/span> ''<\/span>,<\/span>\r\n    database<\/span>:<\/span> '<\/span>nodejs<\/span>'<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>connect<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>promise-mysql connect.<\/span>'<\/span>);<\/span>\r\n    conn<\/span> =<\/span> connect<\/span>;<\/span>\r\n    \/\/ insert<\/span>\r\n    const<\/span> sql<\/span> =<\/span> '<\/span>UPDATE <\/span>'<\/span> +<\/span> TABLE_NAME<\/span> +<\/span> '<\/span> SET age = ? WHERE name = ?<\/span>'<\/span>;<\/span>\r\n    const<\/span> inserts<\/span> =<\/span> [<\/span>35<\/span>,<\/span> '<\/span>\u6c37\u5ba4<\/span>'<\/span>];<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>sql<\/span>,<\/span> inserts<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>result<\/span>);<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>res<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>res<\/span>);<\/span>\r\n    \/\/ select<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>'<\/span>SELECT * FROM node_mysql_test<\/span>'<\/span>);<\/span>\r\n    conn<\/span>.<\/span>end<\/span>();<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>rows<\/span>)<\/span> {<\/span>\r\n    \/\/ select is success<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>SELECT is Success!<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>rows<\/span>);<\/span>\r\n}).<\/span>catch<\/span>(<\/span>function<\/span>(<\/span>error<\/span>)<\/span> {<\/span>\r\n    if<\/span> (<\/span>conn<\/span> &&<\/span> conn<\/span>.<\/span>end<\/span>)<\/span> conn<\/span>.<\/span>end<\/span>();<\/span>\r\n    \/\/logs out the error<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>catch error.<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>error<\/span>);<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
\u606d\u559c\uff01\u51b0\u5ba4\u5148\u751f\u7684\u6b63\u786e\u5e74\u9f84\u5df2\u88ab\u8bb0\u5f55\u4e0b\u6765\uff01<\/p>\n
\u522a\u9664<\/h2>\n
\/**\r\n * promise-mysql module\r\n * @type       {Object}\r\n *\/<\/span>\r\nconst<\/span> mysql<\/span> =<\/span> require<\/span>(<\/span>'<\/span>\/usr\/local\/lib\/node_modules\/promise-mysql<\/span>'<\/span>);<\/span>\r\n\/**\r\n * table name\r\n * @type       {string}\r\n *\/<\/span>\r\nconst<\/span> TABLE_NAME<\/span> =<\/span> '<\/span>node_mysql_test<\/span>'<\/span>;<\/span>\r\n\/**\r\n * connection\r\n * @type       {Object}\r\n *\/<\/span>\r\nlet<\/span> conn<\/span>;<\/span>\r\nlet<\/span> connection<\/span> =<\/span> mysql<\/span>.<\/span>createConnection<\/span>({<\/span>\r\n    host<\/span>:<\/span> '<\/span>localhost<\/span>'<\/span>,<\/span>\r\n    user<\/span>:<\/span> '<\/span>root<\/span>'<\/span>,<\/span>\r\n    password<\/span>:<\/span> ''<\/span>,<\/span>\r\n    database<\/span>:<\/span> '<\/span>nodejs<\/span>'<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>connect<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>promise-mysql connect.<\/span>'<\/span>);<\/span>\r\n    conn<\/span> =<\/span> connect<\/span>;<\/span>\r\n    \/\/ delete<\/span>\r\n    const<\/span> sql<\/span> =<\/span> '<\/span>DELETE FROM <\/span>'<\/span> +<\/span> TABLE_NAME<\/span> +<\/span> '<\/span> WHERE name = ?<\/span>'<\/span>;<\/span>\r\n    const<\/span> inserts<\/span> =<\/span> [<\/span>'<\/span>\u845b\u57ce<\/span>'<\/span>];<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>sql<\/span>,<\/span> inserts<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>result<\/span>);<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>res<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>res<\/span>);<\/span>\r\n    \/\/ select<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>'<\/span>SELECT * FROM node_mysql_test<\/span>'<\/span>);<\/span>\r\n    conn<\/span>.<\/span>end<\/span>();<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>rows<\/span>)<\/span> {<\/span>\r\n    \/\/ select is success<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>SELECT is Success!<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>rows<\/span>);<\/span>\r\n}).<\/span>catch<\/span>(<\/span>function<\/span>(<\/span>error<\/span>)<\/span> {<\/span>\r\n    if<\/span> (<\/span>conn<\/span> &&<\/span> conn<\/span>.<\/span>end<\/span>)<\/span> conn<\/span>.<\/span>end<\/span>();<\/span>\r\n    \/\/logs out the error<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>catch error.<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>error<\/span>);<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
\u8fd8\u6709\u5176\u4ed6SELECT\u7684\u65b9\u6cd5<\/h2>\n
\/**\r\n * promise-mysql module\r\n * @type       {Object}\r\n *\/<\/span>\r\nconst<\/span> mysql<\/span> =<\/span> require<\/span>(<\/span>'<\/span>\/usr\/local\/lib\/node_modules\/promise-mysql<\/span>'<\/span>);<\/span>\r\n\/**\r\n * table name\r\n * @type       {string}\r\n *\/<\/span>\r\nconst<\/span> TABLE_NAME<\/span> =<\/span> '<\/span>node_mysql_test<\/span>'<\/span>;<\/span>\r\n\/**\r\n * pool\r\n * @type       {Object}\r\n *\/<\/span>\r\nlet<\/span> conn<\/span>;<\/span>\r\nlet<\/span> pool<\/span> =<\/span> mysql<\/span>.<\/span>createPool<\/span>({<\/span>\r\n    host<\/span>:<\/span> '<\/span>localhost<\/span>'<\/span>,<\/span>\r\n    user<\/span>:<\/span> '<\/span>root<\/span>'<\/span>,<\/span>\r\n    password<\/span>:<\/span> ''<\/span>,<\/span>\r\n    database<\/span>:<\/span> '<\/span>nodejs<\/span>'<\/span>\r\n});<\/span>\r\n\r\nlet<\/span> sql<\/span> =<\/span> '<\/span>SELECT * FROM <\/span>'<\/span> +<\/span> TABLE_NAME<\/span>;<\/span>\r\npool<\/span>.<\/span>query<\/span>(<\/span>sql<\/span>).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>rows<\/span>)<\/span> {<\/span>\r\n    \/\/ select is success<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>SELECT is Success!<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>rows<\/span>);<\/span>\r\n}).<\/span>catch<\/span>(<\/span>function<\/span>(<\/span>error<\/span>)<\/span> {<\/span>\r\n    \/\/logs out the error<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>catch error.<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>error<\/span>);<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
\/**\r\n * promise-mysql module\r\n * @type       {Object}\r\n *\/<\/span>\r\nconst<\/span> mysql<\/span> =<\/span> require<\/span>(<\/span>'<\/span>\/usr\/local\/lib\/node_modules\/promise-mysql<\/span>'<\/span>);<\/span>\r\n\/**\r\n * table name\r\n * @type       {string}\r\n *\/<\/span>\r\nconst<\/span> TABLE_NAME<\/span> =<\/span> '<\/span>node_mysql_test<\/span>'<\/span>;<\/span>\r\n\/**\r\n * pool\r\n * @type       {Object}\r\n *\/<\/span>\r\nlet<\/span> conn<\/span>;<\/span>\r\nlet<\/span> pool<\/span> =<\/span> mysql<\/span>.<\/span>createPool<\/span>({<\/span>\r\n    host<\/span>:<\/span> '<\/span>localhost<\/span>'<\/span>,<\/span>\r\n    user<\/span>:<\/span> '<\/span>root<\/span>'<\/span>,<\/span>\r\n    password<\/span>:<\/span> ''<\/span>,<\/span>\r\n    database<\/span>:<\/span> '<\/span>nodejs<\/span>'<\/span>\r\n});<\/span>\r\n\r\npool<\/span>.<\/span>getConnection<\/span>().<\/span>then<\/span>(<\/span>function<\/span>(<\/span>connection<\/span>)<\/span> {<\/span>\r\n    let<\/span> sql<\/span> =<\/span> '<\/span>SELECT * FROM <\/span>'<\/span> +<\/span> TABLE_NAME<\/span>;<\/span>\r\n    connection<\/span>.<\/span>query<\/span>(<\/span>sql<\/span>).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>rows<\/span>)<\/span> {<\/span>\r\n        \/\/ select is success<\/span>\r\n        console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>SELECT is Success!<\/span>'<\/span>);<\/span>\r\n        console<\/span>.<\/span>log<\/span>(<\/span>rows<\/span>);<\/span>\r\n    });<\/span>\r\n}).<\/span>catch<\/span>(<\/span>function<\/span>(<\/span>error<\/span>)<\/span> {<\/span>\r\n    \/\/logs out the error<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>catch error.<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>error<\/span>);<\/span>\r\n    done<\/span>(<\/span>error<\/span>);<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
\u6211\u60f3\u8981\u5b9e\u73b0\u4ea4\u6613.<\/h1>\n
\u73b0\u5728\u6bd4\u8d77\u4f7f\u7528node-mysql\u7684\u65f6\u5019\uff0c\u53ef\u8bfb\u6027\u597d\u591a\u4e86\u3002<\/p>\n
\/**\r\n * promise-mysql module\r\n * @type       {Object}\r\n *\/<\/span>\r\nconst<\/span> mysql<\/span> =<\/span> require<\/span>(<\/span>'<\/span>\/usr\/local\/lib\/node_modules\/promise-mysql<\/span>'<\/span>);<\/span>\r\n\/**\r\n * table name\r\n * @type       {string}\r\n *\/<\/span>\r\nconst<\/span> TABLE_NAME<\/span> =<\/span> '<\/span>node_mysql_test<\/span>'<\/span>;<\/span>\r\n\/**\r\n * connection\r\n * @type       {Object}\r\n *\/<\/span>\r\nlet<\/span> conn<\/span>;<\/span>\r\nmysql<\/span>.<\/span>createConnection<\/span>({<\/span>\r\n    host<\/span>:<\/span> '<\/span>localhost<\/span>'<\/span>,<\/span>\r\n    user<\/span>:<\/span> '<\/span>root<\/span>'<\/span>,<\/span>\r\n    password<\/span>:<\/span> ''<\/span>,<\/span>\r\n    database<\/span>:<\/span> '<\/span>nodejs<\/span>'<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>connect<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>promise-mysql connect.<\/span>'<\/span>);<\/span>\r\n    conn<\/span> =<\/span> connect<\/span>;<\/span>\r\n    \/\/ console.log(conn);<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>beginTransaction<\/span>();<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>res<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>res<\/span>);<\/span>\r\n    let<\/span> sql<\/span> =<\/span> '<\/span>SELECT * FROM <\/span>'<\/span> +<\/span> TABLE_NAME<\/span>;<\/span>\r\n    return<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>sql<\/span>);<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>rows<\/span>)<\/span> {<\/span>\r\n    \/\/ select is success<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>SELECT is Success!<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>rows<\/span>);<\/span>\r\n    \/\/ insert data<\/span>\r\n    let<\/span> sql<\/span> =<\/span> '<\/span>INSERT INTO <\/span>'<\/span> +<\/span> TABLE_NAME<\/span> +<\/span> '<\/span> SET ?<\/span>'<\/span>;<\/span>\r\n    let<\/span> inserts<\/span> =<\/span> {<\/span>name<\/span>:<\/span> '<\/span>\u6850\u751f<\/span>'<\/span>,<\/span> age<\/span>:<\/span> 26<\/span>};<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>sql<\/span>,<\/span> inserts<\/span>);<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>res<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>INSERT is Success!<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>res<\/span>);<\/span>\r\n    \/\/ const result = conn.rollback();    \/\/ \u3053\u3053\u3067\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u767a\u52d5\u3059\u308c\u3070\u5b9f\u884c\u3055\u308c\u305a\u306b\u7d42\u308f\u308b<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>commit<\/span>();<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>res<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>COMMIT Success!<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>res<\/span>);<\/span>\r\n    \/\/ select data<\/span>\r\n    let<\/span> sql<\/span> =<\/span> '<\/span>SELECT * FROM <\/span>'<\/span> +<\/span> TABLE_NAME<\/span>;<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>sql<\/span>);<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>rows<\/span>)<\/span> {<\/span>\r\n    \/\/ select is success<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>SELECT is Success!<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>rows<\/span>);<\/span>\r\n    return<\/span> Promise<\/span>.<\/span>resolve<\/span>(<\/span>1<\/span>);<\/span>    \/\/ \u6b21\u306eFunction\u306b\u884c\u304f\u5f15\u6570<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>res<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>res<\/span>);<\/span>\r\n    \/\/ \u6700\u5f8c\u306b\u5fc5\u305a\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u3092\u958b\u653e\u3059\u308b<\/span>\r\n    if<\/span> (<\/span>conn<\/span>)<\/span>\r\n    {<\/span>\r\n        conn<\/span>.<\/span>end<\/span>();<\/span>\r\n    }<\/span>\r\n});<\/span>\r\n<\/code><\/pre>\n
\u5173\u4e8e\u8fde\u63a5\u6c60\u7684\u5185\u5bb9<\/h1>\n
\/**\r\n * promise-mysql module\r\n * @type       {Object}\r\n *\/<\/span>\r\nconst<\/span> mysql<\/span> =<\/span> require<\/span>(<\/span>'<\/span>\/usr\/local\/lib\/node_modules\/promise-mysql<\/span>'<\/span>);<\/span>\r\n\/**\r\n * table name\r\n * @type       {string}\r\n *\/<\/span>\r\nconst<\/span> TABLE_NAME<\/span> =<\/span> '<\/span>node_mysql_test<\/span>'<\/span>;<\/span>\r\n\/**\r\n * connection\r\n * @type       {Object}\r\n *\/<\/span>\r\nlet<\/span> conn<\/span>;<\/span>\r\n\/**\r\n * pool\r\n * @type       {Object}\r\n *\/<\/span>\r\nlet<\/span> pool<\/span> =<\/span> mysql<\/span>.<\/span>createPool<\/span>({<\/span>\r\n    host<\/span>:<\/span> '<\/span>localhost<\/span>'<\/span>,<\/span>\r\n    user<\/span>:<\/span> '<\/span>root<\/span>'<\/span>,<\/span>\r\n    password<\/span>:<\/span> ''<\/span>,<\/span>\r\n    database<\/span>:<\/span> '<\/span>nodejs<\/span>'<\/span>,<\/span>\r\n    connectionLimit<\/span>:<\/span> 10<\/span>,<\/span>\r\n})<\/span>\r\n\r\npool<\/span>.<\/span>getConnection<\/span>().<\/span>then<\/span>(<\/span>function<\/span>(<\/span>connect<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>promise-mysql connect.<\/span>'<\/span>);<\/span>\r\n    conn<\/span> =<\/span> connect<\/span>;<\/span>\r\n    \/\/ console.log(conn);<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>beginTransaction<\/span>();<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>res<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>res<\/span>);<\/span>\r\n    let<\/span> sql<\/span> =<\/span> '<\/span>SELECT * FROM <\/span>'<\/span> +<\/span> TABLE_NAME<\/span>;<\/span>\r\n    return<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>sql<\/span>);<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>rows<\/span>)<\/span> {<\/span>\r\n    \/\/ select is success<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>SELECT is Success!<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>rows<\/span>);<\/span>\r\n    \/\/ insert data<\/span>\r\n    let<\/span> sql<\/span> =<\/span> '<\/span>INSERT INTO <\/span>'<\/span> +<\/span> TABLE_NAME<\/span> +<\/span> '<\/span> SET ?<\/span>'<\/span>;<\/span>\r\n    let<\/span> inserts<\/span> =<\/span> {<\/span>name<\/span>:<\/span> '<\/span>\u6700\u4e0a<\/span>'<\/span>,<\/span> age<\/span>:<\/span> 52<\/span>};<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>sql<\/span>,<\/span> inserts<\/span>);<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>res<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>INSERT is Success!<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>res<\/span>);<\/span>\r\n    \/\/ const result = conn.rollback();    \/\/ \u3053\u3053\u3067\u30ed\u30fc\u30eb\u30d0\u30c3\u30af\u767a\u52d5\u3059\u308c\u3070\u5b9f\u884c\u3055\u308c\u305a\u306b\u7d42\u308f\u308b<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>commit<\/span>();<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>res<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>COMMIT Success!<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>res<\/span>);<\/span>\r\n    \/\/ select data<\/span>\r\n    let<\/span> sql<\/span> =<\/span> '<\/span>SELECT * FROM <\/span>'<\/span> +<\/span> TABLE_NAME<\/span>;<\/span>\r\n    const<\/span> result<\/span> =<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>sql<\/span>);<\/span>\r\n    return<\/span> result<\/span>;<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>rows<\/span>)<\/span> {<\/span>\r\n    \/\/ select is success<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>SELECT is Success!<\/span>'<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>rows<\/span>);<\/span>\r\n    return<\/span> Promise<\/span>.<\/span>resolve<\/span>(<\/span>1<\/span>);<\/span>    \/\/ \u6b21\u306eFunction\u306b\u884c\u304f\u5f15\u6570<\/span>\r\n}).<\/span>then<\/span>(<\/span>function<\/span>(<\/span>res<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>res<\/span>);<\/span>\r\n    \/\/ \u6700\u5f8c\u306b\u5fc5\u305a\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u3092\u958b\u653e\u3059\u308b<\/span>\r\n    \/\/ console.log(conn);<\/span>\r\n    \/\/ if (conn && conn.end)<\/span>\r\n    \/\/ {<\/span>\r\n    \/\/     conn.end();<\/span>\r\n    \/\/ }<\/span>\r\n    pool<\/span>.<\/span>releaseConnection<\/span>(<\/span>conn<\/span>);<\/span>\r\n}).<\/span>catch<\/span>(<\/span>function<\/span>(<\/span>err<\/span>)<\/span> {<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>'<\/span>catch error.<\/span>'<\/span>);<\/span>\r\n    done<\/span>(<\/span>err<\/span>);<\/span>\r\n});<\/span>\r\n\r\n<\/code><\/pre>\n
\u5728\u4f7f\u7528pool\u7684\u60c5\u51b5\u4e0b\uff0c\u5f00\u59cb\u7684\u65f6\u5019\u4f7f\u7528pool.getConnection()\u83b7\u53d6\u8fde\u63a5\uff0c\u7ed3\u675f\u7684\u65f6\u5019\u4f7f\u7528pool.releaseConnection(connection)\u91ca\u653e\u8fde\u63a5\u3002<\/p>\n
\u4f60\u4e0d\u80fd\u4f7f\u7528async\/await\u5417\uff1f<\/h1>\n
\u53ef\u4ee5\u5199\u3002\u5b9e\u9645\u4e0a\u8fd9\u8fb9\u66f4\u806a\u660e\u3002<\/p>\n
async<\/span> mysqlSelect<\/span>()<\/span>\r\n{<\/span>\r\n    let<\/span> conn<\/span> =<\/span> await<\/span> mysql<\/span>.<\/span>createConnection<\/span>({<\/span>\r\n        host<\/span>:<\/span> '<\/span>localhost<\/span>'<\/span>,<\/span>\r\n        user<\/span>:<\/span> '<\/span>root<\/span>'<\/span>,<\/span>\r\n        password<\/span>:<\/span> ''<\/span>,<\/span>\r\n        database<\/span>:<\/span> '<\/span>nodejs<\/span>'<\/span>\r\n    });<\/span>\r\n\r\n    let<\/span> sql<\/span> =<\/span> '<\/span>SELECT * FROM <\/span>'<\/span> +<\/span> TABLE_NAME<\/span>;<\/span>\r\n    const<\/span> result<\/span> =<\/span> await<\/span> conn<\/span>.<\/span>query<\/span>(<\/span>sql<\/span>);<\/span>\r\n    console<\/span>.<\/span>log<\/span>(<\/span>result<\/span>);<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6700\u540e<\/h1>\n
\u9019\u7bc7\u6587\u7ae0\u9084\u6c92\u6709\u9810\u5b9a\u7684\u66f4\u65b0\u3002
\n\u53e6\u5916\uff0c\u5982\u679c\u6709\u8cc7\u8a0a\u7684\u8a71\uff0c\u8acb\u5728\u8a55\u8ad6\u4e2d\u63d0\u4f9b\uff0c\u5c07\u4e0d\u52dd\u611f\u6fc0\u3002
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