当我开始收到404错误时,我正在对我的web.xml进行一些更改。我的servlet只打印出json数据。或者当我尝试运行代码时,我的tomcat服务器没有响应。什么似乎是问题?我尝试过不同的servlet映射,但似乎仍然没有工作。感谢您花时间查看我的代码,非常感谢!
<servlet>
<servlet-name>inventory</servlet-name>
<servlet-class>InventoryServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>inventory</servlet-name>
<url-pattern>InventoryServlet</url-pattern>
</servlet-mapping>
</web-app>
刚刚打印出JSON数据的servlet的开始。
@SuppressWarnings("serial")
public class InventoryServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
ArrayList < LavaLamp > lamps = new ArrayList < LavaLamp > ();
Manufacturer lavaLampDotCom = new Manufacturer();
lavaLampDotCom.setManName("lavalamp.com");
LavaLamp blulava = new LavaLamp();
blulava.setLavaName("Blulava");
blulava.setType("Original");
blulava.setPrice(17.99);
blulava.setHeight(12);
blulava.setWidth(3.5);
blulava.setWaxColor("Blue");
blulava.setLiquidColor("Red");
blulava.setId(1);
blulava.setCostBook(new SimpleCostBook(blulava.getPrice()));
blulava.setManufacturer(lavaLampDotCom);
blulava.setManId(1);
blulava.setSku(1111);
lamps.add(blulava);
Manufacturer volcanicLavaDotNet = new Manufacturer();
volcanicLavaDotNet.setManName("volcaniclava.net");
LavaLamp bloodlava = new LavaLamp();
bloodlava.setLavaName("Blood Lava");
bloodlava.setType("Original");
bloodlava.setWaxColor("Red");
bloodlava.setLiquidColor("Green");
bloodlava.setPrice(15.99);
bloodlava.setHeight(12);
bloodlava.setWidth(3.5);
bloodlava.setId(2);
bloodlava.setCostBook(new SimpleCostBook(bloodlava.getPrice()));
bloodlava.setManufacturer(volcanicLavaDotNet);
bloodlava.setManId(4);
bloodlava.setSku(2222);
lamps.add(bloodlava);
Manufacturer lavaHouseDotCom = new Manufacturer();
lavaHouseDotCom.setManName("lavahouse.com");
LavaLamp purppower = new LavaLamp();
purppower.setLavaName("Purp Power");
purppower.setType("Large");
purppower.setWaxColor("Purple");
purppower.setLiquidColor("Yellow");
purppower.setPrice(22.99);
purppower.setHeight(16);
purppower.setWidth(4.5);
purppower.setId(3);
purppower.setCostBook(new SimpleCostBook(purppower.getPrice()));
purppower.setManufacturer(lavaHouseDotCom);
purppower.setManId(3);
purppower.setSku(3333);
lamps.add(purppower);
Manufacturer lavaCountryDotOrg = new Manufacturer();
lavaCountryDotOrg.setManName("lavacountry.org");
LavaLamp mellowyellow = new LavaLamp();
mellowyellow.setLavaName("Mellow Yellow");
mellowyellow.setType("Large");
mellowyellow.setWaxColor("Yellow");
mellowyellow.setLiquidColor("Black");
mellowyellow.setPrice(29.99);
mellowyellow.setHeight(16);
mellowyellow.setWidth(4.5);
mellowyellow.setId(4);
mellowyellow.setCostBook(new SimpleCostBook(mellowyellow.getPrice()));
mellowyellow.setManufacturer(lavaCountryDotOrg);
mellowyellow.setManId(5);
mellowyellow.setSku(4444);
lamps.add(mellowyellow);
Manufacturer jamiesBasementDotSwag = new Manufacturer();
jamiesBasementDotSwag.setManName("jamiesbasement.swag");
LavaLamp rainbowmadness = new LavaLamp();
rainbowmadness.setLavaName("Rainbow Madness");
rainbowmadness.setType("XXL");
rainbowmadness.setWaxColor("Rainbow");
rainbowmadness.setLiquidColor("Clear");
rainbowmadness.setPrice(49.99);
rainbowmadness.setHeight(50);
rainbowmadness.setWidth(12.5);
rainbowmadness.setId(5);
rainbowmadness.setCostBook(new SimpleCostBook(rainbowmadness.getPrice()));
rainbowmadness.setManufacturer(jamiesBasementDotSwag);
rainbowmadness.setManId(2);
rainbowmadness.setSku(5555);
lamps.add(rainbowmadness);
Manufacturer lavaLampCom = new Manufacturer();
lavaLampCom.setManName("lavalamp.com");
LavaLamp greenwilly = new LavaLamp();
greenwilly.setLavaName("Green Willy");
greenwilly.setType("Large");
greenwilly.setWaxColor("Green");
greenwilly.setLiquidColor("Clear");
greenwilly.setPrice(27.99);
greenwilly.setHeight(16);
greenwilly.setWidth(3.5);
greenwilly.setId(6);
greenwilly.setCostBook(new SimpleCostBook(greenwilly.getPrice()));
greenwilly.setManufacturer(lavaLampCom);
greenwilly.setManId(1);
greenwilly.setSku(6666);
lamps.add(greenwilly);
try {
PrintWriter out = response.getWriter();
out.write(new Gson().toJson(lamps));
} catch (IOException e) {
e.printStackTrace();
}
}
}
答案 0 :(得分:0)
确认您已正确设置课程,例如:
<servlet>
<servlet-name>MyServletClass</servlet-name>
<servlet-class>myPackage.mySubPackage.myClass</servlet-class>
</servlet>
我找到了这个tutorial,您可以在其中看到JPS和Servlet的完整示例以及如何修改您的web.xml文件。所有代码都可用,所以我认为它可以帮助您:http://www.ibm.com/developerworks/java/library/j-hangman-app/index.html