今天遇到一个servlet乱码问题
新建web工程myproject
新建servlet
public class ThreeParams extends HttpServlet
{
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
resp.setContentType("text/html;charset=UTF-8");
req.setCharacterEncoding("UTF-8");
PrintWriter out=resp.getWriter();
out.println(req.getParameter("param1"));
out.println("<br>");
out.println(req.getParameter("param2"));
out.println("<br>");
out.println(req.getParameter("param3"));
out.println("<br>");
System.out.println("in doGet");
}
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
System.out.println("in doPost");
resp.setContentType("text/html;charset=UTF-8 ");
req.setCharacterEncoding("UTF-8");
PrintWriter out=resp.getWriter();
out.println(req.getParameter("param1"));
out.println("<br>");
out.println(req.getParameter("param2"));
out.println("<br>");
out.println(req.getParameter("param3"));
out.println("<br>");
}
private static final long serialVersionUID = 1L;
}
新建jsp类 为servlet提供参数
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="ThreeParams" id="form1" method="post" name="form1">
<table width="343" border="1">
<tr>
<td width="92">
param1
</td>
<td width="94">
<input name="param1" type="text" id="param1" />
</td>
</tr>
<tr>
<td width="92">
param2
</td>
<td>
<input name="param2" type="text" id="param2" />
</td>
</tr>
<tr>
<td>
param3
</td>
<td>
<input type="text" name="param3" id="param3" />
</td>
</tr>
<tr>
<td>
</td>
<td>
<label>
<input type="submit" value="提交" />
</label>
</td>
</tr>
</table>
</form>
<br>
<form action="ThreeParams" id="form1" method="get" name="form1">
<table width="343" border="1">
<tr>
<td width="92">
param1
</td>
<td width="94">
<input name="param1" type="text" id="param1" />
</td>
</tr>
<tr>
<td width="92">
param2
</td>
<td>
<input name="param2" type="text" id="param2" />
</td>
</tr>
<tr>
<td>
param3
</td>
<td>
<input type="text" name="param3" id="param3" />
</td>
</tr>
<tr>
<td>
</td>
<td>
<label>
<input type="submit" value="提交" />
</label>
</td>
</tr>
</table>
</form>
</body>
</html>
接下来配置web.xml
<servlet>
<servlet-name>threep</servlet-name>
<servlet-class>ThreeParams</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>threep</servlet-name>
<url-pattern>/ThreeParams</url-pattern>
</servlet-mapping>
执行 http://localhost:8080/myproject/threeparams.jsp
在表单中输入中文，发现post方式提交的表单中的中文提交后正常显示，而get方式提交的表单中中文是乱码。解决方法是修改tomcat中的server.xml，将其中的
<Connector port="8080" protocol="HTTP/1.1"
maxThreads="150" connectionTimeout="20000"
redirectPort="8443" />
改为<Connector port="8080" protocol="HTTP/1.1"
maxThreads="150" connectionTimeout="20000"
redirectPort="8443" URIEncoding="UTF-8"/>
就可以都正常显示中文字符了
新建servlet
public class ThreeParams extends HttpServlet
{
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
resp.setContentType("text/html;charset=UTF-8");
req.setCharacterEncoding("UTF-8");
PrintWriter out=resp.getWriter();
out.println(req.getParameter("param1"));
out.println("<br>");
out.println(req.getParameter("param2"));
out.println("<br>");
out.println(req.getParameter("param3"));
out.println("<br>");
System.out.println("in doGet");
}
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException
{
System.out.println("in doPost");
resp.setContentType("text/html;charset=UTF-8 ");
req.setCharacterEncoding("UTF-8");
PrintWriter out=resp.getWriter();
out.println(req.getParameter("param1"));
out.println("<br>");
out.println(req.getParameter("param2"));
out.println("<br>");
out.println(req.getParameter("param3"));
out.println("<br>");
}
private static final long serialVersionUID = 1L;
}
新建jsp类 为servlet提供参数
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>
<form action="ThreeParams" id="form1" method="post" name="form1">
<table width="343" border="1">
<tr>
<td width="92">
param1
</td>
<td width="94">
<input name="param1" type="text" id="param1" />
</td>
</tr>
<tr>
<td width="92">
param2
</td>
<td>
<input name="param2" type="text" id="param2" />
</td>
</tr>
<tr>
<td>
param3
</td>
<td>
<input type="text" name="param3" id="param3" />
</td>
</tr>
<tr>
<td>
</td>
<td>
<label>
<input type="submit" value="提交" />
</label>
</td>
</tr>
</table>
</form>
<br>
<form action="ThreeParams" id="form1" method="get" name="form1">
<table width="343" border="1">
<tr>
<td width="92">
param1
</td>
<td width="94">
<input name="param1" type="text" id="param1" />
</td>
</tr>
<tr>
<td width="92">
param2
</td>
<td>
<input name="param2" type="text" id="param2" />
</td>
</tr>
<tr>
<td>
param3
</td>
<td>
<input type="text" name="param3" id="param3" />
</td>
</tr>
<tr>
<td>
</td>
<td>
<label>
<input type="submit" value="提交" />
</label>
</td>
</tr>
</table>
</form>
</body>
</html>
接下来配置web.xml
<servlet>
<servlet-name>threep</servlet-name>
<servlet-class>ThreeParams</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>threep</servlet-name>
<url-pattern>/ThreeParams</url-pattern>
</servlet-mapping>
执行 http://localhost:8080/myproject/threeparams.jsp
在表单中输入中文，发现post方式提交的表单中的中文提交后正常显示，而get方式提交的表单中中文是乱码。解决方法是修改tomcat中的server.xml，将其中的
<Connector port="8080" protocol="HTTP/1.1"
maxThreads="150" connectionTimeout="20000"
redirectPort="8443" />
改为<Connector port="8080" protocol="HTTP/1.1"
maxThreads="150" connectionTimeout="20000"
redirectPort="8443" URIEncoding="UTF-8"/>
就可以都正常显示中文字符了