执行命令
cd libxml2-2.6.8
./configure --prefix=/usr/liu/xml/libxml2    （/usr/liu/xml/libxml2为你要安装的路径）
make
make install
安装完成即可。

#if defined(LIBXML_WRITER_ENABLED) && defined(LIBXML_OUTPUT_ENABLED)

#define MY_ENCODING "UTF-8"

xmlChar *ConvertInput(const char *in, const char *encoding);

int main(int argc, char *argv[])
{
 int rc;
    xmlTextWriterPtr writer;   
    char *tmp;

 writer = xmlNewTextWriterFilename("chinese.xml", 0);
    if (writer == NULL) {
        printf("testXmlwriterFilename: Error creating the xml writer\n");
        return;
    }

 rc = xmlTextWriterStartDocument(writer, NULL, MY_ENCODING, NULL);
    if (rc < 0) {
        printf
            ("testXmlwriterMemory: Error at xmlTextWriterStartDocument\n");
        return;
    }

 /*********************中文测试**********************/

 rc = xmlTextWriterStartElement(writer, BAD_CAST "实例");
    if (rc < 0) {
        printf
            ("testXmlwriterMemory: Error at xmlTextWriterStartElement\n");
        return;
    }

 tmp = ConvertInput("非常好",MY_ENCODING);
 
 /*
 rc = xmlTextWriterWriteAttribute(writer, BAD_CAST "制作人",
                               BAD_CAST tmp);
 if (rc < 0) {
  printf
   ("testXmlwriterFilename: Error at xmlTextWriterWriteAttribute\n");
     return;
 }
 */

 
 rc = xmlTextWriterWriteElement(writer, BAD_CAST "子实例", BAD_CAST tmp);
    if (rc < 0) {
        printf
            ("testXmlwriterMemory: Error at xmlTextWriterStartElement\n");
        return;
    }
 if(tmp!=NULL) xmlFree(tmp);

 rc = xmlTextWriterEndElement(writer);
    if (rc < 0) {
        printf("testXmlwriterMemory: Error at xmlTextWriterEndElement\n");
        return;
    }

 /*********************中文测试完*********************/

 rc = xmlTextWriterEndDocument(writer);
    if (rc < 0) {
        printf("testXmlwriterMemory: Error at xmlTextWriterEndDocument\n");
        return;
    }
 
 xmlFreeTextWriter(writer);
    
 return 0;
}

//将输入字符串转换成指定的编码格式
xmlChar * ConvertInput(const char *in, const char *encoding)
{
    xmlChar *out;
    int ret;
    int size;
    int out_size;
    int temp;
    xmlCharEncodingHandlerPtr handler;

    if (in == 0)
        return 0;

    handler = xmlFindCharEncodingHandler(encoding);

    if (!handler) {
        printf("ConvertInput: no encoding handler found for '%s'\n",
               encoding ? encoding : "");
        return 0;
    }

    size = (int) strlen(in) + 1;
    out_size = size * 2 - 1;
    out = (unsigned char *) xmlMalloc((size_t) out_size);

    if (out != 0) {
        temp = size - 1;
        ret = handler->input(out, &out_size, (const xmlChar *) in, &temp);
        if (ret || temp - size + 1) {
            if (ret) {
                printf("ConvertInput: conversion wasn't successful.\n");
            } else {
                printf
                    ("ConvertInput: conversion wasn't successful. converted: %i octets.\n",
                     temp);
            }

            xmlFree(out);
            out = 0;
        } else {
            out = (unsigned char *) xmlRealloc(out, out_size + 1);
            out[out_size] = 0;  /*null terminating out */
        }
    } else {
        printf("ConvertInput: no mem\n");
    }

    return out;
}

#else
int main(void) {
    fprintf(stderr, "Writer or output support not compiled in\n");
    exit(1);
}
#endif

哪位大侠会的请快快援手！！