質問編集履歴
2
編集
test
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File without changes
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test
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@@ -146,7 +146,7 @@
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146
146
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149
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-
OutputStream out = response.getOutputStream();//画像側のストリーム<===getOutputStream()はこのレスポンスに対して既に呼び出されています
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149
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+
OutputStream out = response.getOutputStream();//画像側のストリーム<===エラー：getOutputStream()はこのレスポンスに対して既に呼び出されています
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150
150
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151
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1
編集
test
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File without changes
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test
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@@ -16,6 +16,8 @@
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16
16
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17
17
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```java
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18
18
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19
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+
//①クライント側 アンドロイドアプリ
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20
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+
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19
21
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@Override
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20
22
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21
23
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protected Result doInBackground(Void... voids) {
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@@ -113,3 +115,101 @@
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113
115
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}
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114
116
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115
117
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```
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118
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+
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119
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120
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121
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```java
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122
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123
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//②サーバー側
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124
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125
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public class Hello extends HttpServlet{
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126
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127
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128
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129
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@Override
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130
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131
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public void doGet(
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132
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133
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HttpServletRequest request,
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134
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135
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HttpServletResponse response
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136
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137
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) throws ServletException, IOException {
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138
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139
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140
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141
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try {
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142
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143
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response.setContentType("application/octet-stream ;charset=UTF-8");
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144
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145
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response.setHeader("Content-Disposition" ,"attachment");
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146
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147
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+
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148
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+
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149
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+
OutputStream out = response.getOutputStream();//画像側のストリーム<===getOutputStream()はこのレスポンスに対して既に呼び出されています
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150
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+
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151
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+
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152
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153
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//////テキスト////////start/////////////////////////////////
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154
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155
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PrintWriter out2=response.getWriter();//テキスト側のストリーム
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156
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157
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out2.println("こんにちは777777");
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158
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159
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//////テキスト////////end/////////////////////////////////
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160
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+
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161
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162
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+
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163
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+
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164
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165
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//////画像側////////start/////////////////////////////////
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166
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+
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167
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FileInputStream input =new FileInputStream("/Applications/Eclipse_4.7.2.app/Contents/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/book777/WEB-INF/classes/chapter3/1.jpg");
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168
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+
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169
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+
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170
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+
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171
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+
int i = input.read();
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172
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+
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173
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while(i !=-1) {
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174
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+
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175
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+
char c = (char)i;
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176
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+
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177
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out.write(c); //ここでバイナリーデータを流している
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178
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+
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179
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i = input.read();
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180
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+
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181
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}
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182
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+
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183
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+
input.close();
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184
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+
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185
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+
out.close();
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186
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+
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187
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+
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188
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+
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189
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//////画像側////////end/////////////////////////////////
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190
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+
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191
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+
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192
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+
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193
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+
}catch(Exception e) {
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194
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+
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195
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+
System.out.println("意味不明のエラーです");
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196
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+
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197
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+
System.out.println(e);
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198
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+
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199
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+
}catch (Throwable e) {
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200
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+
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201
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System.out.println("byte[] data = IOUtils.toByteArray(input);でエラーです");
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202
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+
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203
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+
}
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204
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+
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205
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+
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206
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+
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207
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+
//out.close();
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208
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+
|
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209
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+
}
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210
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+
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211
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+
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212
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+
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213
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+
}
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214
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+
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215
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+
```
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