- In server.xml,you can add it as a root.
<Context path="" docBase="war_name" debug="0" reloadable="true"></Context>The real reason is that it connect "/" to "/war_name",so when you visit "/url_path",it convert to visiting "/url_path/war_name",as you thought it is root. Another way is make you appName ROOT,and in this way ,don't use (Context path) in server.xml,it will conflict.
- So the Good way as I think,when deploying the project first time,Stop tomcat, and remove war file and change the deployed file as ROOT
- In html, just put enctype="multipart/form-data" into form tag as an attribute
<form action="/uploadThing" method="post" enctype="multipart/form-data">
<input type="file" name="file"/>
...
</form>- In applicationContext.xml, add a bean with id=multipartResolver
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<!-- one of the properties available; the maximum file size in bytes -->
<property name="maxUploadSize" value="100000"/>
</bean>-
For the bean multipartResolver, there need two libraries, commons-fileupload-1.3.3.jar and commons-io-2.6.jar
-
In MVC controller,using an annotation shows as follow
@RequestMapping(value = { "/uploadThing" }, method = RequestMethod.POST,consumes = "multipart/form-data")
public String uplaodThing(@RequestParam("file")MultipartFile multipartFile,...){
...
}-
Another choice is js, with using formdata,
reference:
https://developer.mozilla.org/en-US/docs/Web/API/FormData/Using_FormData_Objects
e.x
var formData = new FormData();
formData.append("path",path);
formData.append("file",file);
$.ajax({
url: 'uploadFile',
type: 'POST',
data: formData,
enctype: 'multipart/form-data',
processData: false,
contentType: false,
cache: false,
success: function (response) {
fresh();
}
});In this situation, convert the charset in MVC because the default charset for FormData is ISO-8859-1, e.x.
@RequestMapping(value = { "/uploadFile" },produces = "application/json;charset=utf-8")
@ResponseBody
public String uploadThing(@RequestParam(value="path", required = true)String path,@RequestParam(value = "file", required = false) MultipartFile multipartFile) {
String orgName = multipartFile.getOriginalFilename();
try {
path=new String(path.getBytes("ISO-8859-1"),"utf-8");
orgName=new String(orgName.getBytes("ISO-8859-1"),"utf-8");
} catch(Exception e) {
}
...What confused me is why should use the bean with id=multipartResolver. Perhaps it has some relation bewteen enctype="multipart/form-data" and multipartResolver Class, as it's mentioned in 16.8 Spring's multipart (fileupload) support. So it may be dispatched when springMVC detected the header with enctype="multipart/form-data", and it goes to the multipartResolver.
- In html, I often use jq for json post
$.ajax({
dataType: "json",
url: url,
data: data,
success: success
});- In MVC controller,add produces = "application/json" in the annotation of RequestMapping, and return @ResponseBody with json format text.
@RequestMapping(value = "/url", produces = "application/json")
@ResponseBody
public String tablesql(@RequestParam(value = "param",required = false) String param){
return "{json:\"format\"}";
}-
create a maven project,then add pom attributes, then add web.xml, applicationContext.xml, dispatcher-servlet.xml.
reference:
https://maven.apache.org/archetypes/maven-archetype-webapp/index.html
https://medium.com/nycdev/java-build-a-tomcat-web-app-with-maven-and-spring-fbc823fa9a37
https://howtodoinjava.com/maven/tomcat-maven-plugin-example/
http://tomcat.apache.org/maven-plugin-trunk/tomcat7-maven-plugin/usage.html
https://stackoverflow.com/questions/2237537/which-maven-dependencies-to-include-for-spring-3-0
https://crunchify.com/how-to-import-all-spring-mvc-dependencies-to-your-maven-project/
http://www.avajava.com/tutorials/lessons/how-do-i-create-a-web-application-project-using-maven.html
- In header, set produces value MediaType.APPLICATION_OCTET_STREAM_VALUE of the RequestMapping.
@RequestMapping(value = { "url" },produces = MediaType.APPLICATION_OCTET_STREAM_VALUE)- reference:
https://github.com/spring-projects/spring-integration/blob/master/src/reference/asciidoc/ip.adoc
https://github.com/spring-projects/spring-integration-samples/tree/master/basic/tcp-client-server
spring-projects/spring-integration-samples#87
- folder don't determine the class package when javac compiling
- the class is ordered by folder In any folder, the package is like "aa.bb.xxx" which is all ok. when having compiled, the class package must be place in folder aa/bb/xxx