三步走
第一步:
導入 struts2-json-plugin-2.5.jar(記得build path) ;
第二步:
配置action:
1、實現strust2的方法之一是繼承ActionSupport;
2、實現容器的get,set方法(json傳輸)
3:返回值對應的是strust.xml的result的name值
package control;
import com.opensymphony.xwork2.ActionSupport;
import common.JsonResponse;
import utils.User;
public class Strustjson extends ActionSupport{//action繼承
private static final long serialVersionUID = 1L;
public User user;
public JsonResponse jsonResponse;
public JsonResponse getJsonResponse() {
return jsonResponse;
}
public void setJsonResponse(JsonResponse jsonResponse) {
this.jsonResponse = jsonResponse;
}
public void setUser(User user) {
this.user = user;
}
public String all() {
user= new User(1,"12","412");
System.out.println("222");
return "success";//我的名字叫success
}
public String test() {
System.out.println("111");
jsonResponse = JsonResponse.Success("你做咩啊???");
return "jsonResponse";//我的名字叫success
}
}
User 實體類:
package utils;
import java.io.Serializable;
public class User implements Serializable{
private static final long serialVersionUID = 1L;
private int id;
private String name;
private String password;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
@Override
public String toString() {
return "User [id=" + id + ", name=" + name + ", password=" + password + "]";
}public User() {
}
public User(int id, String name, String password) {
this.id = id;
this.name = name;
this.password = password;
}
public static User success(String name,String passsword) {
User user=new User();
user.setName(name);
user.setPassword(passsword);
return user;
}
}
jsonResponse 實體類:
package common;
import java.io.Serializable;
public class JsonResponse implements Serializable{
private static final long serialVersionUID = 1L;
private int code;
private String msg;
private Object data;
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
public JsonResponse(int code, String msg, Object data) {
super();
this.code = code;
this.msg = msg;
this.data = data;
}
public JsonResponse() {
}
public static JsonResponse Success(Object data) {
return new JsonResponse(1,"success",data);
}
public static JsonResponse Fail(Object data) {
return new JsonResponse(1,"fail",data);
}
}
第三步
配置strust2.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"
"http://struts.apache.org/dtds/struts-2.5.dtd">
<struts>
<!-- <constant name="struts.action.extension" value="action"/> -->
<!-- <constant name="struts.enable.SlashesInActionNames" value="true"/> -->
<constant name="struts.devMode" value="true"/>
<!-- 只適合strust2.3之前版本-->
<constant name="struts.enable.DynamicMethodInvocation" value="true"/>
<!-- <constant name="struts.enable.SlashesInActionNames" value="true"/> -->
<!-- struts配置文件改動後,是否重新加載 -->
<constant name="struts.configuration.xml.reload" value="true"/>
<package name="jsondata" extends="json-default" >
<action name="datajson_*" class="control.Strustjson" method="{1}">
<result name="jsonResponse" type="json">
<param name="excludeNullProperties">true</param>
<param name="root">jsonResponse</param>
</result>
<result name="success" type="json">
<param name="excludeNullProperties">true</param>
<param name="root">User</param>
</result>
<!-- strust2.3之後版本,動態方法-->
<allowed-methods>regex:.*</allowed-methods>
</action>
</package>
</struts>
注意 :
<param name="excludeNullProperties">true</param>//去掉空值;
備註:
Strust2 訪問過程:
前端通過ajax/axios訪問數據 ,後端接收數據,經過web.xml過濾
(strust2過濾),再通過strust.xml去調用繼承action方法的類。再返回結果給strust.xml,再返回給前端;
strust2.xml:
action.name:路徑的訪問名字;
例如:http://localhost:8080/search/datajson_test :對應的是
datajson_test;(本次測試中採用的動態方法datajson_*)
開啓動態方法(適用於strust2.5及以後):
<allowed-methods>regex:.*</allowed-methods>
action.class:對應處理的類;
action.method:對應類中哪個方法;
result.name:對應類中的返回值;
result.type:返回給前端是頁面還是json數據;(默認爲頁面)
param:參數設置;
param.name:參數名稱;
param中的值,對應返回對象的名稱;
Strust2 訪問線路:
ajax或者axios |
---|
web.xml |
strust.xml |
strust.xml 中action.name 與ajax/axios的路徑(結尾)匹配 |
action.class 找到對應的類 method找到對應的方法 |
在方法中通過返回值匹配對應的result.name |
strust.xml result.type="" result值對應界面 |
strust.xml result.type=“json” result值對應j返回json數據 |