问题描述
各位前辈好！ 本人最近在做一个关于输气管网计算界面的项目，要用到Flex与java通信。我在java里面定义了static变量，然后在flex里面向java传值（传的值有数组类型，也有double类型），然后在java里面实现计算并返回（能不能返回数组？如何做到？在flex里输入到什么组件比较好？）到flex。现在我经过测试发现传值的过程没什么问题，但是返回到flex里老出问题，百思不得其解,请求各位援助。下面是我的调用的java类：（注：程序运行没有什么问题的，只是没法被flex调用返回值，我是想调用Final（）或者calculation（）来返回getP（）等）package danxiang;import java.sql.ResultSet;import com.sun.xml.internal.bind.v2.schemagen.xmlschema.List;import domain.Model;import domain.Result;import flex.messaging.io.ArrayList;public class SectionCalculationwj {static double d[];static int start[];public static double deta ;public static double Z;static int end[];static double l[];static double qq[];static double Q0[];static double section[];public static int point;public static int ss;static double P0[] ;static double T0[];public static double Th ;static double K[] ;public static double rog ;public static double cpg ;public static double Di;//下面这一部分是在flex里面调用的，从flex里面往这传值public String initiateqq(double init[]){ qq=init; return "qq"; }public String initiatepoint(int i){point=i;return "point";}public String initiateSection(double init[]){ section=init; return "section";}public String initiateStart(int init[]){ start=init; return "start";}public String initiateEnd(int init[]){ end=init; return "end::"+end[1];}public String initiated(double init[]){ d=init; return "D:::"+d[1]; }public String initiatel(double init[]){ l=init; return "L:::"+l[1];}public String initiateT0(double init[]){ T0=init; return "T0";}public String initiateQ0(double init[]){ Q0=init; return "Q0";}public String initiateP(double init[]){P0=init; return "P0";}public String initiateK(double init[]){ K=init; return "K";}public double initiatedeta(double DETA){ deta=DETA; return deta;}public double initiatess(int S){ ss=S; return ss;}public double initiaterog(double ROG){ rog=ROG; return rog;}public double initiatecpg(double C){ cpg=C; return cpg;}public double initiateDi(double di){ Di=di; return Di;}public double initiateTh(double th){ Th=th; return Th;}public double initiateZ(double zz){ Z=zz; return Z;}//////下面是我希望调用的，并返回到flex里面。。//public String Final() {// SectionCalculationwj aa = new SectionCalculationwj();// aa.calculation();// return "Hello,成功了！";// // } public double[] calculation() { int step = 0; Result result = new Result(); //第一步，取初值 Model model = getInitValue(); //节点数 int n = model.getPoint(); //管道数 int m = model.getSection().length; //计算出A，Azz result.setA(A(model)); result.setAzz(Azz(result.getA())); result.setP(model.getP0()); result.setAverageP(averageP(model, result)); double condition; result.setQx(model.getQ0()); result.setT(model.getT0()); result.setBw(bw(result)); do { result.setSj(Sj(model, result)); double[] tempQ = {}; //算AGA之前先求出G result.setG(G(result.getSj(), result.getQx())); result.setAGA(AGA(result)); fenkuai kf = new fenkuai(); result.setP(kf.fk(result.getAGA(), model.getSs(), result.getP(), model.getQq())); result.setAverageP(averageP(model, result)); result.setDetap(detap(result)); tempQ = Qnew(result); condition = condition(tempQ, result.getQx()); for (int k = 0; k < tempQ.length; k++) { tempQ[k] = (result.getQx()[k] + tempQ[k]) / 2; } result.setQx(tempQ); // 温降 水 result.setAa(aa(model, result)); result.setT(resetT(model, result));// 水的析出 result.setBw(bw(result)); result.setDetabw(detabw(model,result)); step += 1; } while (condition > 0.001); System.out.println(step); for (int i = 0; i < 12; i++) { System.out.println("" + result.getP()[i]); } for (int i = 0; i < 12; i++) { System.out.println("" + result.getT()[i]); } for (int i = 0; i < 11; i++) { System.out.println("" + result.getDetabw()[i]); } return result.getP(); }public double[][] A(Model model) { int[] start = model.getStart(); int[] end = model.getEnd(); double[] section = model.getSection(); int n = model.getPoint(); int m = section.length; double[][] A = new double[n][m]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { if (i + 1 == start[j]) { A[i][j] = -1; } if (i + 1 == end[j]) { A[i][j] = 1; } else if (i + 1 != start[j] && i + 1 != end[j]) { A[i][j] = 0; } } } return A; } //将A矩阵转置 public double[][] Azz(double[][] A) { int n = A.length; int m = A[0].length; double[][] Azz = new double[m][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { Azz[j][i] = A[i][j]; } } return Azz; } // 计算Sj public double[] Sj(Model model, Result result) { double[] section = model.getSection(); double[] D = model.getD(); double[] L = model.getL(); double[] T = result.getT(); double deta = model.getDeta(); double Z = model.getZ(); double[] averageP = result.getAverageP(); //第一步，计算lam的值 int m = section.length; double[] lam = new double[m]; double[] Sj = new double[m]; for (int i = 0; i < m; i++) { lam[i] = 0.009407 / Math.pow(D[i], (1.0 / 3)); } //第二步，计算Sj for (int i = 0; i < m; i++) { Sj[i] = -675.3515 * lam[i] * deta * Z * T[i] * L[i] / Math.pow(D[i], 5) / (2 * averageP[i]); } return Sj; } // 计算G public double[][] G(double[] Sj, double[] Q) { int m = Sj.length; double[][] G = new double[m][m]; for (int i = 0; i < m; i++) { for (int j = 0; j < m; j++) { if (i == j) { G[i][j] = 1 / Sj[i] / Math.abs(Q[i]); } else { G[i][j] = 0; } } } return G; } //计算AGA public double[][] AGA(Result result) { double[][] G = result.getG(); double[][] A = result.getA(); double[][] Azz = result.getAzz(); int n = A.length; int m = A[0].length; double AG[][] = new double[n][m]; double AGA[][] = new double[n][n]; for (int i = 0; i < A.length; i++) { for (int j = 0; j < G[0].length; j++) { for (int k = 0; k < G.length; k++) { AG[i][j] += A[i][k] * G[k][j]; } } } for (int i = 0; i < AG.length; i++) { for (int j = 0; j < Azz[0].length; j++) { for (int k = 0; k < Azz.length; k++) { AGA[i][j] += AG[i][k] * Azz[k][j]; } } } return AGA; } public double[] detap(Result result) { double[][] Azz = result.getAzz(); double[] p = result.getP(); int m = Azz.length; int n = Azz[0].length; double[] detap = new double[m]; //计算压力降 for (int i = 0; i < m; i++) { for (int j = 0; j < n; j++) { detap[i] += Azz[i][j] * p[j]; } } return detap; } public double[] averageP(Model model, Result result) { double[] P = result.getP(); int[] start = model.getStart(); int[] end = model.getEnd(); int m = start.length; double[] averageP = new double[m]; for (int j = 0; j < m; j++) { averageP[j] = 0.5 * (P[start[j] - 1] + P[end[j] - 1]); } return averageP; } public double[] Qnew(Result result) { //计算新流量 double[][] G = result.getG(); double[] detap = result.getDetap(); int m = G.length; double[] Qnew = new double[m]; for (int i = 0; i < m; i++) { for (int j = 0; j < m; j++) { Qnew[i] += G[i][j] * detap[j]; } } return Qnew; } public double condition(double[] tempQ, double[] Q) { int m = tempQ.length; double condition = 0.0; for (int i = 0; i < m; i++) { condition += Math.pow((tempQ[i] - Q[i]), 2); } condition = Math.pow(condition, 0.5); return condition; } //单相温降计算 public double[] aa(Model model, Result result) { double[] Q = result.getQx(); double[] D = model.getD(); double[] K = model.getK(); double rog = model.getRog(); double cpg = model.getCpg(); double[] bw=result.getBw(); int m = Q.length; double[] aa = new double[m]; for (int i = 0; i < m; i++) { aa[i] = K[i] * Math.PI * D[i] / ((rog+bw[i]) * Q[i] * cpg )/1000000; } return aa; } public double[] resetT(Model model, Result result) { double Th = model.getTh(); int[] start = model.getStart(); int[] end = model.getEnd(); double[] T = result.getT(); double[] aa = result.getAa(); double[] l = model.getL(); double Di = model.getDi(); double[] detap = result.getDetap(); int m = aa.length; for (int i = 0; i < m; i++) { T[end[i] - 1] = Th + ((T[start[i] - 1]) - Th) * Math.exp(-aa[i] * l[i]) + Di * detap[i] / 1000000 * (1 - Math.exp(-aa[i] * l[i])) / aa[i] / l[i]; } return T; } //饱和水的计算kg/m3直接加在气体密度上 public double[] bw(Result result) { double[] T = result.getT(); double[] P=result.getP(); int m = P.length; double[] pb=new double[m];//饱和蒸汽压 double[] bw = new double[m]; // y = 0.06233 x3 + 0.60057 x2 + 46.27664 x + 643.34653 xOC，ypa for (int j = 0; j < m; j++) { pb[j] = 0.06233*Math.pow(T[j]-273.15,3)+0.60057*Math.pow(T[j]-273.15,2)+46.27664*(T[j]-273.15)+643.34653; bw[j]=803*pb[j]/(P[j]-pb[j])*0.001; } return bw; } //起终点水量变化计算 >0进水,<0析出水 单位kg public double[] detabw(Model model,Result result) { double[] bw = result.getBw(); int[] start=model.getStart(); int[] end=model.getEnd(); double[]d=model.getD(); double[]L=model.getL(); int m = start.length; double[] detabw = new double[m]; for (int j = 0; j < m; j++) { detabw[j] = (bw[end[j]-1] - bw[start[j]-1])*(Math.PI*Math.pow(d[j], 2)/4)*L[j]; } return detabw; } } 问题补充：FLEX里面的array可以直接传给java的数组，我测试过了；问题是我现在即使把public double[] calculation() 改成public String calculation()返回单个字符getP()[1]也是不成功zyn010101 写道
解决方案
把calculation方法中的代码全放到下面的代码处，try{代码 } catch(Exception e){e.printStackTrace();}
解决方案二：
我们Flex访问后台用的<mx:HTTPService标签可以定位到后台要访问的Action，在请求的时可以用var params:URLVariables = new URLVariables();params.objec = Object可以携带任何类型的参数，params.oper="adminLogin";，具体那个方法， 在后台Java中直接可以request.getParameter("object")获得传过来的参数，在后台做一系列的操作计算以后，用writeResponse(rusponse,object.toString());写回到前台的成功方法（注意，writeResponse为自定义方法）， 写回的object为String类型，你可以使用JSON包的JSON对象开封装数组，集合等， 现在就可以在前台Flex的protected function logOutSuccess(event:ResultEvent):void{var returnInfo : String = event.result.toString();｝里面得到这个对象了，然后你传过来的是什么类型你就转换成什么类型，就可以了
解决方案三：
直接string交互 ， 传过去了再自己折腾呗 。
解决方案四：
我qq381547903，你加我吧
解决方案五：
在后台java代码加catch Exception块，否则控制台不报错
解决方案六：
flex获取的数据alert出来和java端获取的一样不？前端报什么错？监控RemoteObject的fault事件，把错误信息alert出来看看。
解决方案七：
你查下as和java的数据类型对应表，你把数组转成字符串到flex端再切割字符串吧。