Message formatting Method

When I learned the C language, I did not adapt to its print method to output information. Later I found it interesting. Because it places the parameter in the desired position according to the appropriate position.

Later, when writing a message, I found that many messages are similar, and then I wanted to use a template. Then I only needed the changed information to pass it as a parameter. Later, I checked that Java has good support.

Next, we will summarize some of the frequently used message formatting methods that can be used in project development.

1. Java implementation

 
/** String java. Text. messageformat. Format (string pattern, object... arguments) * format information and enter the following parameters in the specified position in sequence. * Note: The placeholder count starts from "0" */Public void formatmessage () {string pattern = "{0}-{1}-{2}"; string result = messageformat. format (pattern, 1, "two", '3'); system. out. println (result );}/*~! Output: 1-two-3 */
 

/** String Java. lang. string. format (string format, object... ARGs) * Outputs a six-digit numeric string. For the rule of filling * format with "0" for the missing digits, see formatter class in API-Format String syntax */Public void formatstring () {string format = "% 06d"; string result = string. format (format, 30); system. out. println (result );}/*~! Output: 000030 */
 

2. Struts 2 Application

A. Configure the International File
Method 1: struts. xml configuration
<Constant name = "struts. Custom. i18n. Resources" value = "message"> </constant>
Method 2: struts. properties configuration
Struts. Custom. i18n. Resources = message
B. message_zh_cn.properties Configuration
Temp = {0} data {1}
C. Use it on the page
<S: Text name = "Temp">
<S: Param value = "% {'kkkk '}"/>
<S: param> kllll </S: param>
</S: Text>

! Use of the <s: param> label
The S: Param tag of struts2 mainly has two attributes: Name and value. If you want to enter the direct quantity in the value attribute, you can write as follows: <s: param name = "some" value = "% {'user'}"/>, you can also write: <s: Param name = "some"> User </s: param>. However, if the value is directly assigned, this value is not dynamically generated by action, but a character string specified by itself. Only the latter can be used.

3. Javascript implementation

String. format = function (SRC) {If (arguments. length = 0) return NULL; var ARGs = array. prototype. slice. call (arguments, 1); Return SRC. replace (/\ {(\ D +) \}/g, function (M, I) {return ARGs [I] = undefined? Null: ARGs [I] ;}) ;};
 

Message formatting is implemented.

Recently, I saw jquery. i18n. properties on the Internet to achieve internationalization. I learned about it yesterday.

// This will initialize the plugin // and show two dialog boxes: one with the text "ol áworld" // and other with the text "Good Morning John! "Jquery. i18n. properties ({Name: 'message', // use the resource file name path: 'js/i18n/', // path of the resource file: 'both ', // call method. The value 'vars' (default) can be used as a variable. The 'map' map method or 'both' both support language: 'en _ us ', // language callback: function () {// We specified mode: 'Both 'So translated values will be // available as JS vars/functions and as a map // accessing a simple value through the map // call jquery through map. i18n. prop ('msg _ hello'); // accessing a value with placeholders through the map // call with the map parameter. John replaces the corresponding parameter and supports multiple parameters of jquery. i18n. prop ('msg _ complex ', ['john']); // accessing a simple value through a JS variable // Call Alert (msg_hello + ''+ msg_world) through variables );}});
 

You can use $. i18n. Prop ('key'); to obtain information and display it. Obviously, this is a public method. When we want to further encapsulate it, we encounter a problem: when the variable length parameter is passed to the i18n plug-in, the reason is that the number of parameters cannot be determined. Of course, in JS, parameters for each function are actually an array of arguments. Through this, I made some modifications to them and manually processed the parameter list.

 
$. I18n. Prop = function (key/* Add parameters as function arguments as necessary */) {// For details, refer to the source file ............ // Here is what I addedCodeIf the parameter is an array, It is merged into the parameter array if (arguments. length = 2) {var Params = arguments [1]; if ($. isarray (Params) {arguments. length = 1; $. merge (arguments, Params );}}............}
 

The preceding section describes how to format parameters ~