140 lines
4.0 KiB
Java
140 lines
4.0 KiB
Java
package com.jinrui.assembly.utils;
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import com.alibaba.fastjson.JSONObject;
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import com.jinrui.assembly.utils.text.Convert;
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import com.jinrui.assembly.utils.text.StringUtils;
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import org.springframework.web.context.request.RequestAttributes;
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import org.springframework.web.context.request.RequestContextHolder;
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import org.springframework.web.context.request.ServletRequestAttributes;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import javax.servlet.http.HttpSession;
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import java.io.IOException;
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import java.io.PrintWriter;
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/**
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* 客户端工具类
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*
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* @author ruoyi
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*/
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public class ServletUtils {
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/**
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* 获取String参数
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*/
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public static String getParameter(String name) {
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return getRequest().getParameter(name);
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}
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/**
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* 获取String参数
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*/
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public static String getParameter(String name, String defaultValue) {
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return Convert.toStr(getRequest().getParameter(name), defaultValue);
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}
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/**
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* 获取Integer参数
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*/
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public static Integer getParameterToInt(String name) {
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return Convert.toInt(getRequest().getParameter(name));
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}
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/**
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* 获取Integer参数
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*/
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public static Integer getParameterToInt(String name, Integer defaultValue) {
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return Convert.toInt(getRequest().getParameter(name), defaultValue);
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}
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/**
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* 获取request
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*/
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public static HttpServletRequest getRequest() {
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return getRequestAttributes().getRequest();
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}
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/**
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* 获取response
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*/
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public static HttpServletResponse getResponse() {
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return getRequestAttributes().getResponse();
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}
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/**
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* 获取session
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*/
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public static HttpSession getSession() {
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return getRequest().getSession();
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}
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public static ServletRequestAttributes getRequestAttributes() {
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RequestAttributes attributes = RequestContextHolder.getRequestAttributes();
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return (ServletRequestAttributes) attributes;
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}
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/**
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* 将字符串渲染到客户端
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*
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* @param response 渲染对象
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* @param string 待渲染的字符串
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* @return null
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*/
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public static String renderString(HttpServletResponse response, String string) {
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try {
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response.setStatus(200);
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response.setContentType("application/json");
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response.setCharacterEncoding("utf-8");
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response.getWriter().print(string);
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} catch (IOException e) {
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e.printStackTrace();
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}
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return null;
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}
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/**
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* 是否是Ajax异步请求
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*
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* @param request
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*/
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public static boolean isAjaxRequest(HttpServletRequest request) {
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String accept = request.getHeader("accept");
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if (accept != null && accept.indexOf("application/json") != -1) {
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return true;
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}
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String xRequestedWith = request.getHeader("X-Requested-With");
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if (xRequestedWith != null && xRequestedWith.indexOf("XMLHttpRequest") != -1) {
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return true;
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}
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String uri = request.getRequestURI();
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if (StringUtils.inStringIgnoreCase(uri, ".json", ".xml")) {
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return true;
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}
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String ajax = request.getParameter("__ajax");
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if (StringUtils.inStringIgnoreCase(ajax, "json", "xml")) {
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return true;
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}
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return false;
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}
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/**
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* 返回 JSON 字符串
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*
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* @param response 响应
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* @param object 对象，会序列化成 JSON 字符串
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*/
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@SuppressWarnings("deprecation") // 必须使用 APPLICATION_JSON_UTF8_VALUE，否则会乱码
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public static void writeJSON(HttpServletResponse response, Object object) throws IOException {
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String content = JSONObject.toJSONString(object);
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response.setCharacterEncoding("UTF-8");
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response.setContentType("application/json; charset=utf-8");
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PrintWriter printWriter = response.getWriter();
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printWriter.write(content);
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printWriter.flush();
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printWriter.close();
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}
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}
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